Amber Peguit | Mindanao State University - Iligan Institute of Technology (original) (raw)

Amber Peguit

Uploads

Papers by Amber Peguit

Research paper thumbnail of Growth mechanism of chemically prepared ZnO-SiO2nanostructures grown on glass and silicon substrates

IOP Conference Series: Materials Science and Engineering, 2015

ABSTRACT

Research paper thumbnail of Development of functional ZnS nanospheres as active material for acetic acid detection

We have successfully synthesized zinc sulphide (ZnS) nanospheresdeposited on glass and silicon on... more We have successfully synthesized zinc sulphide (ZnS) nanospheresdeposited on glass and silicon on insulator substrates as an acetic acid sensor. Results show that nanospheresdeposited on silicon on insulator substrate at lower ZnCl2 concentration show better response and good recovery. We found out that the sensitivity of the ZnSnanosphereswere dependent on the surface morphology and that the morphology is affected by the ZnCl2 concentrations and the substrates used. Our results show a promising potential of ZnSnanospheresas an inexpensive alternative sensing material to the existing acetic acid detectors.

Research paper thumbnail of Growth of chemically deposited ZnO and ZnO-SiO 2 on Pt buffered Si substrate

IOP Conference Series: Materials Science and Engineering, 2015

ABSTRACT

Research paper thumbnail of Influence of OH − Ion Concentration on the Surface Morphology of ZnO-SiO 2 Nanostructure

Journal of Nanotechnology, 2015

The influence of varying OH−ion concentration on the surface morphology of chemically deposited Z... more The influence of varying OH−ion concentration on the surface morphology of chemically deposited ZnO-SiO2nanostructures on glass substrate was investigated. The morphological features, phase structure, and infrared characteristics were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), respectively. Results revealed that silica significantly changes the hexagonal morphology of bare ZnO rod to “pointed tips” when using low initial OH−precursor concentration. Increasing OH−ion concentration resulted in a “flower-like” formation of ZnO-SiO2and a remarkable change from “pointed tips” to “hemispherical tips” at the top surface of the rods. The surface capping of SiO2to ZnO leads to the formation of these “hemispherical tips.” The infrared spectroscopic analysis showed the characteristics peaks of ZnO and SiO2as well as the Si-O-Zn band which confirms the formation of ZnO-SiO2. Phase analysis manifested that the form...

Research paper thumbnail of Influence of OH − Ion Concentration on the Surface Morphology of ZnO-SiO 2 Nanostructure

Journal of Nanotechnology, 2015

The influence of varying OH−ion concentration on the surface morphology of chemically deposited Z... more The influence of varying OH−ion concentration on the surface morphology of chemically deposited ZnO-SiO2nanostructures on glass substrate was investigated. The morphological features, phase structure, and infrared characteristics were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), respectively. Results revealed that silica significantly changes the hexagonal morphology of bare ZnO rod to “pointed tips” when using low initial OH−precursor concentration. Increasing OH−ion concentration resulted in a “flower-like” formation of ZnO-SiO2and a remarkable change from “pointed tips” to “hemispherical tips” at the top surface of the rods. The surface capping of SiO2to ZnO leads to the formation of these “hemispherical tips.” The infrared spectroscopic analysis showed the characteristics peaks of ZnO and SiO2as well as the Si-O-Zn band which confirms the formation of ZnO-SiO2. Phase analysis manifested that the form...

Research paper thumbnail of Controlling the Growth of ZnO-SiO<sub>2</sub> Nanostructures Using Pt-Coated Si Substrate

ZnO-SiO2 nanostructures were grown on both bare Si and Pt-coated Si substrates via chemical bath ... more ZnO-SiO2 nanostructures were grown on both bare Si and Pt-coated Si substrates via chemical bath deposition (CBD). The grown nanostructures were characterized using Scanning Electron Microscope with Energy Dispersive X-ray Spectroscopy (SEM-EDS), Fourier Transform Infrared (FTIR) measurement and Ultraviolet-Visible (UV-Vis) absorption spectroscopy. Surface morphology results revealed that Pt-coated Si substrate have promoted the growth of ZnO-SiO2 nanostructures by providing more active sites for nucleation thus formation ZnO-SiO2 nanostructures were observed. It is believed that SiO2 will adhere to the non-polar sides of the grown ZnO nanostructures. This result is manifested in the FTIR spectra which showed a pronounced peak corresponding to ZnO-SiO2 grown on bare Si suggesting that more Si-O bonds are present. However, Pt-coating did not significantly affect the band gap of the grown ZnO-SiO2 nanostructures.

Research paper thumbnail of Controlling the Growth of ZnO-SiO<sub>2</sub> Nanostructures Using Pt-Coated Si Substrate

Applied Mechanics and Materials, 2014

ABSTRACT

Research paper thumbnail of Growth mechanism of chemically prepared ZnO-SiO2nanostructures grown on glass and silicon substrates

IOP Conference Series: Materials Science and Engineering, 2015

ABSTRACT

Research paper thumbnail of Development of functional ZnS nanospheres as active material for acetic acid detection

We have successfully synthesized zinc sulphide (ZnS) nanospheresdeposited on glass and silicon on... more We have successfully synthesized zinc sulphide (ZnS) nanospheresdeposited on glass and silicon on insulator substrates as an acetic acid sensor. Results show that nanospheresdeposited on silicon on insulator substrate at lower ZnCl2 concentration show better response and good recovery. We found out that the sensitivity of the ZnSnanosphereswere dependent on the surface morphology and that the morphology is affected by the ZnCl2 concentrations and the substrates used. Our results show a promising potential of ZnSnanospheresas an inexpensive alternative sensing material to the existing acetic acid detectors.

Research paper thumbnail of Growth of chemically deposited ZnO and ZnO-SiO 2 on Pt buffered Si substrate

IOP Conference Series: Materials Science and Engineering, 2015

ABSTRACT

Research paper thumbnail of Influence of OH − Ion Concentration on the Surface Morphology of ZnO-SiO 2 Nanostructure

Journal of Nanotechnology, 2015

The influence of varying OH−ion concentration on the surface morphology of chemically deposited Z... more The influence of varying OH−ion concentration on the surface morphology of chemically deposited ZnO-SiO2nanostructures on glass substrate was investigated. The morphological features, phase structure, and infrared characteristics were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), respectively. Results revealed that silica significantly changes the hexagonal morphology of bare ZnO rod to “pointed tips” when using low initial OH−precursor concentration. Increasing OH−ion concentration resulted in a “flower-like” formation of ZnO-SiO2and a remarkable change from “pointed tips” to “hemispherical tips” at the top surface of the rods. The surface capping of SiO2to ZnO leads to the formation of these “hemispherical tips.” The infrared spectroscopic analysis showed the characteristics peaks of ZnO and SiO2as well as the Si-O-Zn band which confirms the formation of ZnO-SiO2. Phase analysis manifested that the form...

Research paper thumbnail of Influence of OH − Ion Concentration on the Surface Morphology of ZnO-SiO 2 Nanostructure

Journal of Nanotechnology, 2015

The influence of varying OH−ion concentration on the surface morphology of chemically deposited Z... more The influence of varying OH−ion concentration on the surface morphology of chemically deposited ZnO-SiO2nanostructures on glass substrate was investigated. The morphological features, phase structure, and infrared characteristics were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR), respectively. Results revealed that silica significantly changes the hexagonal morphology of bare ZnO rod to “pointed tips” when using low initial OH−precursor concentration. Increasing OH−ion concentration resulted in a “flower-like” formation of ZnO-SiO2and a remarkable change from “pointed tips” to “hemispherical tips” at the top surface of the rods. The surface capping of SiO2to ZnO leads to the formation of these “hemispherical tips.” The infrared spectroscopic analysis showed the characteristics peaks of ZnO and SiO2as well as the Si-O-Zn band which confirms the formation of ZnO-SiO2. Phase analysis manifested that the form...

Research paper thumbnail of Controlling the Growth of ZnO-SiO<sub>2</sub> Nanostructures Using Pt-Coated Si Substrate

ZnO-SiO2 nanostructures were grown on both bare Si and Pt-coated Si substrates via chemical bath ... more ZnO-SiO2 nanostructures were grown on both bare Si and Pt-coated Si substrates via chemical bath deposition (CBD). The grown nanostructures were characterized using Scanning Electron Microscope with Energy Dispersive X-ray Spectroscopy (SEM-EDS), Fourier Transform Infrared (FTIR) measurement and Ultraviolet-Visible (UV-Vis) absorption spectroscopy. Surface morphology results revealed that Pt-coated Si substrate have promoted the growth of ZnO-SiO2 nanostructures by providing more active sites for nucleation thus formation ZnO-SiO2 nanostructures were observed. It is believed that SiO2 will adhere to the non-polar sides of the grown ZnO nanostructures. This result is manifested in the FTIR spectra which showed a pronounced peak corresponding to ZnO-SiO2 grown on bare Si suggesting that more Si-O bonds are present. However, Pt-coating did not significantly affect the band gap of the grown ZnO-SiO2 nanostructures.

Research paper thumbnail of Controlling the Growth of ZnO-SiO<sub>2</sub> Nanostructures Using Pt-Coated Si Substrate

Applied Mechanics and Materials, 2014

ABSTRACT

Log In