Marjoni Imamora - Profile on Academia.edu (original) (raw)
Papers by Marjoni Imamora
This study aims to determine the application of the talking stick type cooperative learning model... more This study aims to determine the application of the talking stick type cooperative learning model using question cards to students' physics learning outcomes. This type of research is a quasi-experimental research, with a posttest only control group design. Sampling used simple random sampling where class X.4 as the experimental class and X.3 as the control class. Collecting data using a cognitive test of learning outcomes in the form of a multiple choice test with 20 questions. Data on the affective and psychomotor domains of students used observation sheets which were analyzed descriptively qualitatively. From the results of the final test, the average final score for the cognitive domain in the experimental class and control class was 73.47 and 66.30, respectively. For the affective domain, the average values obtained by the experimental class and control class are 72.12 and 68.18, respectively. As for the psychomotor domain, the average values for the experimental class and control class are 73.10 and 68.29, respectively. From the hypothesis test that was carried out, it was found that H0 was rejected and H1 was accepted, it can be concluded that "student physics learning outcomes in the application of the talking stick type cooperative learning model using question cards are better than the physics learning outcomes of students who do not use the talking stick type cooperative learning model. Straight in class X SMAN 2 Sungai Tarab".
Bulletin of Materials Science, 2021
Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior ... more Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior physicochemical properties over a highly symmetric structure counterpart. Here, we present a straightforward method to grow vertically oriented ZnO nanosheet directly on fluorine-tin oxide substrate using a microwave-assisted quasi-hydrothermal method. We also found that the Ag nanoparticles (AgNPs) loading on the surface can effectively modify their optical properties, the potential for upgrading its performance in the existing applications. Due to the simplicity of the technique, AgNPs-loaded standing ZnO nanosheet should find potential application in solar cells, sensing and photocatalysis.
One of the factors in fluence the achievement of learning objectives in schools is teaching mater... more One of the factors in fluence the achievement of learning objectives in schools is teaching material. Based on observations and interviews at SMAN 1 Rambatan, it was found that the teaching materials used by teachers were only textbooks and worksheets on material, formulas, and there were no practicum materials which were improved the 2013 curriculum. This caused the students have not found their own concepts. Therefore, this study aims to create a CTL based learning module to achieve valid HOTS, and practically can assist student in solving physics material, specifically for material harmonious vibration. This type of is research development or research with 4-D research models. which are donated : approved, developed, and disseminated. The CTL learning-based module for achieveing HOTS goals in physics learning designed about seven lessons, named : constructivism, asking questions, inquiry, learning communities, modeling, reflection, and authentic assessment which are studying LOT...
This study aims to determine whether the results of class X students learn physics by using probl... more This study aims to determine whether the results of class X students learn physics by using problem based learning based LKS get better results than the conventional learning in SMAN 1 Batipuh. This research is quasi-experimental research. As the population of this study were all students of class X consists of nine classes taken at random, taken two classes will be assigned as the control class and experimental class. The sampling technique using simple random sampling when members of the population considered to be homogeneous, measures of sampling there are four phases: (1) collecting the value of daily tests of students, (2) test of normality (3) to test the homogeneity (4) analyzing the variation, Results of the study were taken from 33.33% yield cognitive learning, 33.33% affective domain of learning outcomes, 33.33% psychomotor learning outcomes. Obtained an average of learning outcomes experimental class and control class 68.49 73.19 hypothesis testing performed using t-test...
Edusainstika: Jurnal Pembelajaran MIPA, 2021
This study aims to determine the application of the talking stick type cooperative learning model... more This study aims to determine the application of the talking stick type cooperative learning model using question cards to students' physics learning outcomes. This type of research is a quasi-experimental research, with a posttest only control group design. Sampling used simple random sampling where class X.4 as the experimental class and X.3 as the control class. Collecting data using a cognitive test of learning outcomes in the form of a multiple choice test with 20 questions. Data on the affective and psychomotor domains of students used observation sheets which were analyzed descriptively qualitatively. From the results of the final test, the average final score for the cognitive domain in the experimental class and control class was 73.47 and 66.30, respectively. For the affective domain, the average values obtained by the experimental class and control class are 72.12 and 68.18, respectively. As for the psychomotor domain, the average values for the experimental class and control class are 73.10 and 68.29, respectively. From the hypothesis test that was carried out, it was found that H0 was rejected and H1 was accepted, it can be concluded that "student physics learning outcomes in the application of the talking stick type cooperative learning model using question cards are better than the physics learning outcomes of students who do not use the talking stick type cooperative learning model. Straight in class X SMAN 2 Sungai Tarab".
Sainstek : Jurnal Sains dan Teknologi, 2020
A reciprocal relationship is needed between humans and the environment so that there is a balance... more A reciprocal relationship is needed between humans and the environment so that there is a balance and harmony between nature and humans. Therefore it is necessary to implement environmental integrated education, so that the concepts and principles of various kinds of natural phenomena can easily be developed in learning materials and these understandings can be used in everyday life. This development research aims to produce a physics module of global warming symptoms based on the SETS approach. This type of research is research and development with the ADDIE model contains five stages, namely: (1) analyze; (2) design; (3) development; (4) implement; (5) evaluate (assessment). From the research results, it was found that the physics module based on the SETS approach had met the very valid criteria with a percentage of 92%. In terms of practicality, the SETS-based physics module has met the very practical criteria with the percentage of teacher and student response questionnaires being 93% and 90.56%, respectively. In addition, the SETS-based physics module has also met the effective criteria with an N-gain value of 0.76
Bulletin of Materials Science, 2021
Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior ... more Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior physicochemical properties over a highly symmetric structure counterpart. Here, we present a straightforward method to grow vertically oriented ZnO nanosheet directly on fluorine-tin oxide substrate using a microwave-assisted quasi-hydrothermal method. We also found that the Ag nanoparticles (AgNPs) loading on the surface can effectively modify their optical properties, the potential for upgrading its performance in the existing applications. Due to the simplicity of the technique, AgNPs-loaded standing ZnO nanosheet should find potential application in solar cells, sensing and photocatalysis.
One of the factors in fluence the achievement of learning objectives in schools is teaching mater... more One of the factors in fluence the achievement of learning objectives in schools is teaching material. Based on observations and interviews at SMAN 1 Rambatan, it was found that the teaching materials used by teachers were only textbooks and worksheets on material, formulas, and there were no practicum materials which were improved the 2013 curriculum. This caused the students have not found their own concepts. Therefore, this study aims to create a CTL based learning module to achieve valid HOTS, and practically can assist student in solving physics material, specifically for material harmonious vibration. This type of is research development or research with 4-D research models. which are donated : approved, developed, and disseminated. The CTL learning-based module for achieveing HOTS goals in physics learning designed about seven lessons, named : constructivism, asking questions, inquiry, learning communities, modeling, reflection, and authentic assessment which are studying LOT...
This study aims to determine whether the results of class X students learn physics by using probl... more This study aims to determine whether the results of class X students learn physics by using problem based learning based LKS get better results than the conventional learning in SMAN 1 Batipuh. This research is quasi-experimental research. As the population of this study were all students of class X consists of nine classes taken at random, taken two classes will be assigned as the control class and experimental class. The sampling technique using simple random sampling when members of the population considered to be homogeneous, measures of sampling there are four phases: (1) collecting the value of daily tests of students, (2) test of normality (3) to test the homogeneity (4) analyzing the variation, Results of the study were taken from 33.33% yield cognitive learning, 33.33% affective domain of learning outcomes, 33.33% psychomotor learning outcomes. Obtained an average of learning outcomes experimental class and control class 68.49 73.19 hypothesis testing performed using t-test...
Sainstek : Jurnal Sains dan Teknologi, 2020
A reciprocal relationship is needed between humans and the environment so that there is a balance... more A reciprocal relationship is needed between humans and the environment so that there is a balance and harmony between nature and humans. Therefore it is necessary to implement environmental integrated education, so that the concepts and principles of various kinds of natural phenomena can easily be developed in learning materials and these understandings can be used in everyday life. This development research aims to produce a physics module of global warming symptoms based on the SETS approach. This type of research is research and development with the ADDIE model contains five stages, namely: (1) analyze; (2) design; (3) development; (4) implement; (5) evaluate (assessment). From the research results, it was found that the physics module based on the SETS approach had met the very valid criteria with a percentage of 92%. In terms of practicality, the SETS-based physics module has met the very practical criteria with the percentage of teacher and student response questionnaires being 93% and 90.56%, respectively. In addition, the SETS-based physics module has also met the effective criteria with an N-gain value of 0.76
Journal of Teaching and Learning Physics, 2020
limitations on the hard module and the lack of availability of technology-based learning media le... more limitations on the hard module and the lack of availability of technology-based learning media led to a lack of student motivation in learning physics. As a result, it is necessary to develop a constructivism-based electronic physics module. The objective of this research is to know the validity of constructivism-based electronic physics module for 1st student in Senior high school. This research is research and development research. Feasibility tests of the electronic module are carried out through the validation. Validation was carried out by three validators. Based on validation, it showed that constructivism-based electronic physics module that was developed is very valid with a percentage of 89.08%.AbstrakKeterbatasan pada modul cetak serta kurangnya ketersediaan media pembelajaran yang berbasis teknologi menyebabkan kurangnya motivasi siswa dalam mempelajari fisika. Untuk itu perlu dikembangkan sebuah Modul Elektronik fisika berbasis konstruktivisme. Penelitian ini bertujuan u...
Journal of Teaching and Learning Physics, 2020
limitations on the hard module and the lack of availability of technology-based learning media le... more limitations on the hard module and the lack of availability of technology-based learning media led to a lack of student motivation in learning physics. As a result, it is necessary to develop a constructivism-based electronic physics module. The objective of this research is to know the validity of constructivism-based electronic physics module for 1st student in Senior high school. This research is research and development research. Feasibility tests of the electronic module are carried out through the validation. Validation was carried out by three validators. Based on validation, it showed that constructivism-based electronic physics module that was developed is very valid with a percentage of 89.08%.AbstrakKeterbatasan pada modul cetak serta kurangnya ketersediaan media pembelajaran yang berbasis teknologi menyebabkan kurangnya motivasi siswa dalam mempelajari fisika. Untuk itu perlu dikembangkan sebuah Modul Elektronik fisika berbasis konstruktivisme. Penelitian ini bertujuan u...
Journal of Materials Science: Materials in Electronics, 2018
The well-aligned Zinc Oxide Nanorods (ZnONRs) arrays was obtained through a hydrothermal process ... more The well-aligned Zinc Oxide Nanorods (ZnONRs) arrays was obtained through a hydrothermal process at various precursor concentrations (PC) under a growth temperature of 90 °C for an hour. The effect of PC (0.02, 0.03, 0.04, 0.05, and 0.06 M which is denoted as K0.01-K0.06) to the structural, optical, and morfology (diameter, height, slope, and density) of ZnONRs were studied by using X-ray diffraction, UV-Vis spectroscopy, and field emission scanning electron microscopy (FESEM). As-synthesized ZnONRs exhibit an uniform growth direction along the [002] orientations with average diameters in the range of 40-90 nm. These nanorods showed a strong optical absorption peak centering at 367 nm,which is equivalent to optical energy band gap of ZnO 3.37 eV, confirming the formation of ZnONRs. The morfology of ZnONRs in term of diameter, height, slope, and density increases with the PC. The highest density of approximately 182 number/µm −2 with average slope of 6 degree (aligning percentage of 83 ± 12%) was obtained at the PC of K0.04. It is interesting to find that the dye sensitized solar cell utilizing the sample K0.04 showed five times increasing in the power conversion efficiency as compared to that of device utilizing K0.02 sample.
Sainstek : Jurnal Sains dan Teknologi, 2016
The investigation of bimetallic CuPt Nanoparticles (CuPt NPs) with average diameters in the 196.7... more The investigation of bimetallic CuPt Nanoparticles (CuPt NPs) with average diameters in the 196.7±98 nm range have been prepared by the Liquid phase deposition methods and synthesized directly on an indium tin oxide (ITO) substrate. CuPt NPs with high surface defect grown on (ITO) surface were prepared via a simple immersion of the substrate into a solution contains 1 mM Potassium Hexachloro Platinate (K2PtCl6), 0.2 mM Anhydrous Copper (II) Sulfate (CuSO4) anhydrous, 0.01 M Sodium dodecyl sulfate (SDS) and 10 mM Formic acid for 4 h at room temperature. The modification of Cu 2+ ion precursor play a role to determine the nanoparticles geometry obtained. The simultaneous reduction of metal ions leads to either a surface enriched with one component or an alloy type of structure depending on the bimetal composition. The bimetallic CuPt NPs dispersions are characterized by FESEM, EDX Mapping, XRD, HRTEM and XPS analysis.
Sainstek : Jurnal Sains dan Teknologi, 2018
This study aims to produce free fall practicum tools by utilizing phototransistor sensors to reco... more This study aims to produce free fall practicum tools by utilizing phototransistor sensors to record the travel time of objects that fall from the starting point to the end point. Dealing with free falling equipment (GJB), equipment in schools is generally still very simple that is using a stopwatch. This type of research is a research and development using 4-d model (define, design, develop and disseminate), which is limited to the stage of development to practicalization activities. Data were collected through validation and responses toward administered questionnaires. Data analysis were conducted by analyzing validation sheet and quantitative response questionnaire by finding percentage of each item on the validation sheet. Then the data validation results are analyzed by descriptive technique to describe the quality of the developed product. The result of calibration of free fall practicum by using phototransistor sensor at 40 cm, 50 cm, and 70 cm distance obtained the average travel time of each object is 0.28 s, 0.32 s, and 0.37 s. These results indicate that the practicum tool has been calibrated. Validation of practicum tool is 72,39% and validation of questionnaire response of practican is 75%, indicating tool categorized valid. Furthermore, this tool is tested in class X.MIA and XI.MIA MAN 3 Payakumbuh which consisted 23 students in the science laboratory of MAN 3 Payakumbuh with the questionnaire response practicality are 87.75% and 84.41% respectively which are categorized very practical.
Optical Materials, 2018
In this review, we present a summary of research to date on the anatase polymorph of TiO 2 nanost... more In this review, we present a summary of research to date on the anatase polymorph of TiO 2 nanostructures containing high-energy facet, particularly (001) plane, with porous structure, covering their synthesis and their application in photocatalysis as well as a review of any attempts to modify their electrical, optical and photocatalytic properties via doping. After giving a brief introduction on the role of crystalline facet on the physico-chemical properties of the anatase TiO 2 , we discuss the electrical and optical properties of pristine anatase TiO 2 and after being doped with both metal and non-metals dopants. We then continue to the discussion of the electrical properties of (001) faceted anatase TiO 2 and their modification upon being prepared in the form of porous morphology. Before coming to the review of the photocatalytic properties of the (001) faceted anatase and (001) with porous morphology in selected photocatalysis application, such as photodegradation of organic pollutant, hydrogenation reaction, water splitting, etc., we discuss the synthetic strategy for the preparation of them. We then end our discussion by giving an outlook on future strategy for development of research related to highenergy faceted and porous anatase TiO 2 .
KnE Engineering, 2016
Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar ... more Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar cell devices. The performance of such devices is strongly depending on the nanostructures of the thin films used. In this paper reports the effect of growth temperature during synthesis of one-dimensional (1-D) anatase ZnO nanorod arrays through hydrothermal process facing their structure, morphology, and optical properties. The ZnO nanorod was first synthesized use the solution concentration and time fixed at 0.04M and 1 hour. The growth temperature were varied from 70, 80, 90 and 100 °C. The effect of growth temperature on the structural, morphology, and optical absorption of ZnO nanorod were studied by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and UV–vis spectroscopy. The regularity, diameters, heights, and surface densities of the ZnO nanorods were increased with the growth temperature.The optimum results of FESEM characterizations showed tha...
KnE Engineering, 2016
Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar ... more Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar cell devices. The performance of such devices is strongly depending on the nanostructures of the thin films used. In this paper reports the effect of growth temperature during synthesis of one-dimensional (1-D) anatase ZnO nanorod arrays through hydrothermal process facing their structure, morphology, and optical properties. The ZnO nanorod was first synthesized use the solution concentration and time fixed at 0.04M and 1 hour. The growth temperature were varied from 70, 80, 90 and 100 °C. The effect of growth temperature on the structural, morphology, and optical absorption of ZnO nanorod were studied by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and UV–vis spectroscopy. The regularity, diameters, heights, and surface densities of the ZnO nanorods were increased with the growth temperature.The optimum results of FESEM characterizations showed tha...
Effect of thermal reduction temperature on the optical and electrical properties of multilayer graphene
Journal of Materials Science: Materials in Electronics, 2016
Multilayer graphene was prepared by thermal reduction of graphene oxide film at various temperatu... more Multilayer graphene was prepared by thermal reduction of graphene oxide film at various temperatures (200, 400 and 500 °C) in argon atmosphere for an hour. The graphite oxide was first synthesized by using modified Hummers method and spin coated on quartz substrate to form graphene oxide film. X-ray diffraction, field emission scanning electron microscopy, UV–Vis spectroscopy and four point probe measurement were used to characterize the resultant multilayer graphene. The transmittance and sheet resistance decreased with the thermal reduction temperature. The lowest sheet resistance of 91.6 ± 0.3 kΩ/sq was obtained at temperature of 500 °C, showing almost 100 times improvement compared to that prepared at 200 °C.
![Research paper thumbnail of Polythiopene sodium poly [2-(3-thienyl)-ethoxy-4-buthylsulfonate] Inkjet Printed Film-Sensitized ZnO Nanorods Solar Cells](https://attachments.academia-assets.com/86595945/thumbnails/1.jpg)
](This paper reports the study of the sensitizing effect and the structure of the water soluble pol... more This paper reports the study of the sensitizing effect and the structure of the water soluble polymeric dye of polythiopene sodium poly [2-(3-thienyl)-ethoxy-4-buthylsulfonate] (PTEBS) ink-jet thin film on the performance of the dye sensitized solar cells (DSSC) based-ZnO nanorods (ZNRs). DSSC device with sandwich structure of FTO/ZNRs/PTEBS/electrolyte/ Pt was prepared in this study with the electrolyte used was I-/I-3 redox couple. The PTEBS thin film was deposited onto the ZNRs-coated FTO substrate via an inkjet printing technique from the aqueous solution. To obtain a variation in the thin film structure, the PTEBS was grown via a multiple-step printing approach, namely from three to up to seven times. It was found that the PTEBS ink-jet printed film exhibit effective sensitizing effect on the DSSC by giving enhanced photovoltaic performance of multiple higher order (approximately 3 times) compared to a controlled device, the device without PTEBS and its structure was found to influence the charge transfer process in the device. A high performance DSSC device can be obtained from the PTEBS film with highly compact and even structure that prepared by three time printing process, which gives performance of J sc , V oc and FF as high as 0.96 mA/cm 2 , 0.42 V and 34%, respectively, which is corresponding to power conversion efficiency (PCE) as high as 0.14%.
This study aims to determine the application of the talking stick type cooperative learning model... more This study aims to determine the application of the talking stick type cooperative learning model using question cards to students' physics learning outcomes. This type of research is a quasi-experimental research, with a posttest only control group design. Sampling used simple random sampling where class X.4 as the experimental class and X.3 as the control class. Collecting data using a cognitive test of learning outcomes in the form of a multiple choice test with 20 questions. Data on the affective and psychomotor domains of students used observation sheets which were analyzed descriptively qualitatively. From the results of the final test, the average final score for the cognitive domain in the experimental class and control class was 73.47 and 66.30, respectively. For the affective domain, the average values obtained by the experimental class and control class are 72.12 and 68.18, respectively. As for the psychomotor domain, the average values for the experimental class and control class are 73.10 and 68.29, respectively. From the hypothesis test that was carried out, it was found that H0 was rejected and H1 was accepted, it can be concluded that "student physics learning outcomes in the application of the talking stick type cooperative learning model using question cards are better than the physics learning outcomes of students who do not use the talking stick type cooperative learning model. Straight in class X SMAN 2 Sungai Tarab".
Bulletin of Materials Science, 2021
Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior ... more Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior physicochemical properties over a highly symmetric structure counterpart. Here, we present a straightforward method to grow vertically oriented ZnO nanosheet directly on fluorine-tin oxide substrate using a microwave-assisted quasi-hydrothermal method. We also found that the Ag nanoparticles (AgNPs) loading on the surface can effectively modify their optical properties, the potential for upgrading its performance in the existing applications. Due to the simplicity of the technique, AgNPs-loaded standing ZnO nanosheet should find potential application in solar cells, sensing and photocatalysis.
One of the factors in fluence the achievement of learning objectives in schools is teaching mater... more One of the factors in fluence the achievement of learning objectives in schools is teaching material. Based on observations and interviews at SMAN 1 Rambatan, it was found that the teaching materials used by teachers were only textbooks and worksheets on material, formulas, and there were no practicum materials which were improved the 2013 curriculum. This caused the students have not found their own concepts. Therefore, this study aims to create a CTL based learning module to achieve valid HOTS, and practically can assist student in solving physics material, specifically for material harmonious vibration. This type of is research development or research with 4-D research models. which are donated : approved, developed, and disseminated. The CTL learning-based module for achieveing HOTS goals in physics learning designed about seven lessons, named : constructivism, asking questions, inquiry, learning communities, modeling, reflection, and authentic assessment which are studying LOT...
This study aims to determine whether the results of class X students learn physics by using probl... more This study aims to determine whether the results of class X students learn physics by using problem based learning based LKS get better results than the conventional learning in SMAN 1 Batipuh. This research is quasi-experimental research. As the population of this study were all students of class X consists of nine classes taken at random, taken two classes will be assigned as the control class and experimental class. The sampling technique using simple random sampling when members of the population considered to be homogeneous, measures of sampling there are four phases: (1) collecting the value of daily tests of students, (2) test of normality (3) to test the homogeneity (4) analyzing the variation, Results of the study were taken from 33.33% yield cognitive learning, 33.33% affective domain of learning outcomes, 33.33% psychomotor learning outcomes. Obtained an average of learning outcomes experimental class and control class 68.49 73.19 hypothesis testing performed using t-test...
Edusainstika: Jurnal Pembelajaran MIPA, 2021
This study aims to determine the application of the talking stick type cooperative learning model... more This study aims to determine the application of the talking stick type cooperative learning model using question cards to students' physics learning outcomes. This type of research is a quasi-experimental research, with a posttest only control group design. Sampling used simple random sampling where class X.4 as the experimental class and X.3 as the control class. Collecting data using a cognitive test of learning outcomes in the form of a multiple choice test with 20 questions. Data on the affective and psychomotor domains of students used observation sheets which were analyzed descriptively qualitatively. From the results of the final test, the average final score for the cognitive domain in the experimental class and control class was 73.47 and 66.30, respectively. For the affective domain, the average values obtained by the experimental class and control class are 72.12 and 68.18, respectively. As for the psychomotor domain, the average values for the experimental class and control class are 73.10 and 68.29, respectively. From the hypothesis test that was carried out, it was found that H0 was rejected and H1 was accepted, it can be concluded that "student physics learning outcomes in the application of the talking stick type cooperative learning model using question cards are better than the physics learning outcomes of students who do not use the talking stick type cooperative learning model. Straight in class X SMAN 2 Sungai Tarab".
Sainstek : Jurnal Sains dan Teknologi, 2020
A reciprocal relationship is needed between humans and the environment so that there is a balance... more A reciprocal relationship is needed between humans and the environment so that there is a balance and harmony between nature and humans. Therefore it is necessary to implement environmental integrated education, so that the concepts and principles of various kinds of natural phenomena can easily be developed in learning materials and these understandings can be used in everyday life. This development research aims to produce a physics module of global warming symptoms based on the SETS approach. This type of research is research and development with the ADDIE model contains five stages, namely: (1) analyze; (2) design; (3) development; (4) implement; (5) evaluate (assessment). From the research results, it was found that the physics module based on the SETS approach had met the very valid criteria with a percentage of 92%. In terms of practicality, the SETS-based physics module has met the very practical criteria with the percentage of teacher and student response questionnaires being 93% and 90.56%, respectively. In addition, the SETS-based physics module has also met the effective criteria with an N-gain value of 0.76
Bulletin of Materials Science, 2021
Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior ... more Anisotropic nanostructures, such as nanosheets, nanorods, etc., in many cases, generate superior physicochemical properties over a highly symmetric structure counterpart. Here, we present a straightforward method to grow vertically oriented ZnO nanosheet directly on fluorine-tin oxide substrate using a microwave-assisted quasi-hydrothermal method. We also found that the Ag nanoparticles (AgNPs) loading on the surface can effectively modify their optical properties, the potential for upgrading its performance in the existing applications. Due to the simplicity of the technique, AgNPs-loaded standing ZnO nanosheet should find potential application in solar cells, sensing and photocatalysis.
One of the factors in fluence the achievement of learning objectives in schools is teaching mater... more One of the factors in fluence the achievement of learning objectives in schools is teaching material. Based on observations and interviews at SMAN 1 Rambatan, it was found that the teaching materials used by teachers were only textbooks and worksheets on material, formulas, and there were no practicum materials which were improved the 2013 curriculum. This caused the students have not found their own concepts. Therefore, this study aims to create a CTL based learning module to achieve valid HOTS, and practically can assist student in solving physics material, specifically for material harmonious vibration. This type of is research development or research with 4-D research models. which are donated : approved, developed, and disseminated. The CTL learning-based module for achieveing HOTS goals in physics learning designed about seven lessons, named : constructivism, asking questions, inquiry, learning communities, modeling, reflection, and authentic assessment which are studying LOT...
This study aims to determine whether the results of class X students learn physics by using probl... more This study aims to determine whether the results of class X students learn physics by using problem based learning based LKS get better results than the conventional learning in SMAN 1 Batipuh. This research is quasi-experimental research. As the population of this study were all students of class X consists of nine classes taken at random, taken two classes will be assigned as the control class and experimental class. The sampling technique using simple random sampling when members of the population considered to be homogeneous, measures of sampling there are four phases: (1) collecting the value of daily tests of students, (2) test of normality (3) to test the homogeneity (4) analyzing the variation, Results of the study were taken from 33.33% yield cognitive learning, 33.33% affective domain of learning outcomes, 33.33% psychomotor learning outcomes. Obtained an average of learning outcomes experimental class and control class 68.49 73.19 hypothesis testing performed using t-test...
Sainstek : Jurnal Sains dan Teknologi, 2020
A reciprocal relationship is needed between humans and the environment so that there is a balance... more A reciprocal relationship is needed between humans and the environment so that there is a balance and harmony between nature and humans. Therefore it is necessary to implement environmental integrated education, so that the concepts and principles of various kinds of natural phenomena can easily be developed in learning materials and these understandings can be used in everyday life. This development research aims to produce a physics module of global warming symptoms based on the SETS approach. This type of research is research and development with the ADDIE model contains five stages, namely: (1) analyze; (2) design; (3) development; (4) implement; (5) evaluate (assessment). From the research results, it was found that the physics module based on the SETS approach had met the very valid criteria with a percentage of 92%. In terms of practicality, the SETS-based physics module has met the very practical criteria with the percentage of teacher and student response questionnaires being 93% and 90.56%, respectively. In addition, the SETS-based physics module has also met the effective criteria with an N-gain value of 0.76
Journal of Teaching and Learning Physics, 2020
limitations on the hard module and the lack of availability of technology-based learning media le... more limitations on the hard module and the lack of availability of technology-based learning media led to a lack of student motivation in learning physics. As a result, it is necessary to develop a constructivism-based electronic physics module. The objective of this research is to know the validity of constructivism-based electronic physics module for 1st student in Senior high school. This research is research and development research. Feasibility tests of the electronic module are carried out through the validation. Validation was carried out by three validators. Based on validation, it showed that constructivism-based electronic physics module that was developed is very valid with a percentage of 89.08%.AbstrakKeterbatasan pada modul cetak serta kurangnya ketersediaan media pembelajaran yang berbasis teknologi menyebabkan kurangnya motivasi siswa dalam mempelajari fisika. Untuk itu perlu dikembangkan sebuah Modul Elektronik fisika berbasis konstruktivisme. Penelitian ini bertujuan u...
Journal of Teaching and Learning Physics, 2020
limitations on the hard module and the lack of availability of technology-based learning media le... more limitations on the hard module and the lack of availability of technology-based learning media led to a lack of student motivation in learning physics. As a result, it is necessary to develop a constructivism-based electronic physics module. The objective of this research is to know the validity of constructivism-based electronic physics module for 1st student in Senior high school. This research is research and development research. Feasibility tests of the electronic module are carried out through the validation. Validation was carried out by three validators. Based on validation, it showed that constructivism-based electronic physics module that was developed is very valid with a percentage of 89.08%.AbstrakKeterbatasan pada modul cetak serta kurangnya ketersediaan media pembelajaran yang berbasis teknologi menyebabkan kurangnya motivasi siswa dalam mempelajari fisika. Untuk itu perlu dikembangkan sebuah Modul Elektronik fisika berbasis konstruktivisme. Penelitian ini bertujuan u...
Journal of Materials Science: Materials in Electronics, 2018
The well-aligned Zinc Oxide Nanorods (ZnONRs) arrays was obtained through a hydrothermal process ... more The well-aligned Zinc Oxide Nanorods (ZnONRs) arrays was obtained through a hydrothermal process at various precursor concentrations (PC) under a growth temperature of 90 °C for an hour. The effect of PC (0.02, 0.03, 0.04, 0.05, and 0.06 M which is denoted as K0.01-K0.06) to the structural, optical, and morfology (diameter, height, slope, and density) of ZnONRs were studied by using X-ray diffraction, UV-Vis spectroscopy, and field emission scanning electron microscopy (FESEM). As-synthesized ZnONRs exhibit an uniform growth direction along the [002] orientations with average diameters in the range of 40-90 nm. These nanorods showed a strong optical absorption peak centering at 367 nm,which is equivalent to optical energy band gap of ZnO 3.37 eV, confirming the formation of ZnONRs. The morfology of ZnONRs in term of diameter, height, slope, and density increases with the PC. The highest density of approximately 182 number/µm −2 with average slope of 6 degree (aligning percentage of 83 ± 12%) was obtained at the PC of K0.04. It is interesting to find that the dye sensitized solar cell utilizing the sample K0.04 showed five times increasing in the power conversion efficiency as compared to that of device utilizing K0.02 sample.
Sainstek : Jurnal Sains dan Teknologi, 2016
The investigation of bimetallic CuPt Nanoparticles (CuPt NPs) with average diameters in the 196.7... more The investigation of bimetallic CuPt Nanoparticles (CuPt NPs) with average diameters in the 196.7±98 nm range have been prepared by the Liquid phase deposition methods and synthesized directly on an indium tin oxide (ITO) substrate. CuPt NPs with high surface defect grown on (ITO) surface were prepared via a simple immersion of the substrate into a solution contains 1 mM Potassium Hexachloro Platinate (K2PtCl6), 0.2 mM Anhydrous Copper (II) Sulfate (CuSO4) anhydrous, 0.01 M Sodium dodecyl sulfate (SDS) and 10 mM Formic acid for 4 h at room temperature. The modification of Cu 2+ ion precursor play a role to determine the nanoparticles geometry obtained. The simultaneous reduction of metal ions leads to either a surface enriched with one component or an alloy type of structure depending on the bimetal composition. The bimetallic CuPt NPs dispersions are characterized by FESEM, EDX Mapping, XRD, HRTEM and XPS analysis.
Sainstek : Jurnal Sains dan Teknologi, 2018
This study aims to produce free fall practicum tools by utilizing phototransistor sensors to reco... more This study aims to produce free fall practicum tools by utilizing phototransistor sensors to record the travel time of objects that fall from the starting point to the end point. Dealing with free falling equipment (GJB), equipment in schools is generally still very simple that is using a stopwatch. This type of research is a research and development using 4-d model (define, design, develop and disseminate), which is limited to the stage of development to practicalization activities. Data were collected through validation and responses toward administered questionnaires. Data analysis were conducted by analyzing validation sheet and quantitative response questionnaire by finding percentage of each item on the validation sheet. Then the data validation results are analyzed by descriptive technique to describe the quality of the developed product. The result of calibration of free fall practicum by using phototransistor sensor at 40 cm, 50 cm, and 70 cm distance obtained the average travel time of each object is 0.28 s, 0.32 s, and 0.37 s. These results indicate that the practicum tool has been calibrated. Validation of practicum tool is 72,39% and validation of questionnaire response of practican is 75%, indicating tool categorized valid. Furthermore, this tool is tested in class X.MIA and XI.MIA MAN 3 Payakumbuh which consisted 23 students in the science laboratory of MAN 3 Payakumbuh with the questionnaire response practicality are 87.75% and 84.41% respectively which are categorized very practical.
Optical Materials, 2018
In this review, we present a summary of research to date on the anatase polymorph of TiO 2 nanost... more In this review, we present a summary of research to date on the anatase polymorph of TiO 2 nanostructures containing high-energy facet, particularly (001) plane, with porous structure, covering their synthesis and their application in photocatalysis as well as a review of any attempts to modify their electrical, optical and photocatalytic properties via doping. After giving a brief introduction on the role of crystalline facet on the physico-chemical properties of the anatase TiO 2 , we discuss the electrical and optical properties of pristine anatase TiO 2 and after being doped with both metal and non-metals dopants. We then continue to the discussion of the electrical properties of (001) faceted anatase TiO 2 and their modification upon being prepared in the form of porous morphology. Before coming to the review of the photocatalytic properties of the (001) faceted anatase and (001) with porous morphology in selected photocatalysis application, such as photodegradation of organic pollutant, hydrogenation reaction, water splitting, etc., we discuss the synthetic strategy for the preparation of them. We then end our discussion by giving an outlook on future strategy for development of research related to highenergy faceted and porous anatase TiO 2 .
KnE Engineering, 2016
Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar ... more Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar cell devices. The performance of such devices is strongly depending on the nanostructures of the thin films used. In this paper reports the effect of growth temperature during synthesis of one-dimensional (1-D) anatase ZnO nanorod arrays through hydrothermal process facing their structure, morphology, and optical properties. The ZnO nanorod was first synthesized use the solution concentration and time fixed at 0.04M and 1 hour. The growth temperature were varied from 70, 80, 90 and 100 °C. The effect of growth temperature on the structural, morphology, and optical absorption of ZnO nanorod were studied by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and UV–vis spectroscopy. The regularity, diameters, heights, and surface densities of the ZnO nanorods were increased with the growth temperature.The optimum results of FESEM characterizations showed tha...
KnE Engineering, 2016
Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar ... more Nanostructure of semiconductor materials zinc oxide (ZnO) is widely used in fabrication of solar cell devices. The performance of such devices is strongly depending on the nanostructures of the thin films used. In this paper reports the effect of growth temperature during synthesis of one-dimensional (1-D) anatase ZnO nanorod arrays through hydrothermal process facing their structure, morphology, and optical properties. The ZnO nanorod was first synthesized use the solution concentration and time fixed at 0.04M and 1 hour. The growth temperature were varied from 70, 80, 90 and 100 °C. The effect of growth temperature on the structural, morphology, and optical absorption of ZnO nanorod were studied by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and UV–vis spectroscopy. The regularity, diameters, heights, and surface densities of the ZnO nanorods were increased with the growth temperature.The optimum results of FESEM characterizations showed tha...
Effect of thermal reduction temperature on the optical and electrical properties of multilayer graphene
Journal of Materials Science: Materials in Electronics, 2016
Multilayer graphene was prepared by thermal reduction of graphene oxide film at various temperatu... more Multilayer graphene was prepared by thermal reduction of graphene oxide film at various temperatures (200, 400 and 500 °C) in argon atmosphere for an hour. The graphite oxide was first synthesized by using modified Hummers method and spin coated on quartz substrate to form graphene oxide film. X-ray diffraction, field emission scanning electron microscopy, UV–Vis spectroscopy and four point probe measurement were used to characterize the resultant multilayer graphene. The transmittance and sheet resistance decreased with the thermal reduction temperature. The lowest sheet resistance of 91.6 ± 0.3 kΩ/sq was obtained at temperature of 500 °C, showing almost 100 times improvement compared to that prepared at 200 °C.
This paper reports the study of the sensitizing effect and the structure of the water soluble pol... more This paper reports the study of the sensitizing effect and the structure of the water soluble polymeric dye of polythiopene sodium poly [2-(3-thienyl)-ethoxy-4-buthylsulfonate] (PTEBS) ink-jet thin film on the performance of the dye sensitized solar cells (DSSC) based-ZnO nanorods (ZNRs). DSSC device with sandwich structure of FTO/ZNRs/PTEBS/electrolyte/ Pt was prepared in this study with the electrolyte used was I-/I-3 redox couple. The PTEBS thin film was deposited onto the ZNRs-coated FTO substrate via an inkjet printing technique from the aqueous solution. To obtain a variation in the thin film structure, the PTEBS was grown via a multiple-step printing approach, namely from three to up to seven times. It was found that the PTEBS ink-jet printed film exhibit effective sensitizing effect on the DSSC by giving enhanced photovoltaic performance of multiple higher order (approximately 3 times) compared to a controlled device, the device without PTEBS and its structure was found to influence the charge transfer process in the device. A high performance DSSC device can be obtained from the PTEBS film with highly compact and even structure that prepared by three time printing process, which gives performance of J sc , V oc and FF as high as 0.96 mA/cm 2 , 0.42 V and 34%, respectively, which is corresponding to power conversion efficiency (PCE) as high as 0.14%.