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Papers by rahmani abdelhai

2022 2nd International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET), 2022

In this theoretical work, we study the Raman spectra of hydrogenated single walled carbon nanotub... more In this theoretical work, we study the Raman spectra of hydrogenated single walled carbon nanotubes (SWNTs) using the spectral moments method (SMM) coupled to the bond polarizability model. The effect of the C-H bond on the Raman modes of carbon nanotube are analyzed. Percentage of hydrogenation from 1% to 5%, are investigated. We found that the stretching modes of C-H bonds are clearly observed in the 2880-2900 cm-1 range and the Radial Breathing Mode (RBM) of SWNTs is more affected by the hydrogenated than the G-band. The reappearance of new Raman active modes in the D-band is also predicted as we increase the hydrogenation concentration.

HAL (Le Centre pour la Communication Scientifique Directe), Dec 1, 2019

The OAJ Materials and Devices is a journal created at the end oy 2016, devoted to all aspects of ... more The OAJ Materials and Devices is a journal created at the end oy 2016, devoted to all aspects of materials and related devices. It is Open Access and free of charges for authors. Our aim was to create a high quality journal, with a strict peer-review process, and complying with the transparency rules edicted by the DOAJ, COPE,... Policy of the journal Materials and Devices is an Open Access (*) journal which publishes original, and peer-reviewed papers accessible only via internet, freely for all. Your published article can be freely downloaded, and self archiving of your paper is allowed! We apply « the principles of transparency and best practice in scholarly publishing » as defined by the Committee on Publication Ethics (COPE), the Directory of Open Access Journals (DOAJ), and the Open Access Scholarly Publishers Organization (OASPA). The journal is now indexed by the DOAJ and listed by this organization. Evaluation-peer-reviewing : After reception, the paper is sent to reviewers for evaluation. In case of negative or divergent opinions of reviewers, the editor-in-chief sends the paper to another reviewer and then gives a final decision based on all reports. Reviewers are asked to reply within three weeks to warranty a fast publication process.

HAL (Le Centre pour la Communication Scientifique Directe), 2017

General informations Materials and Devices is a new journal devoted to all aspects of materials a... more General informations Materials and Devices is a new journal devoted to all aspects of materials and related devices. It is Open Access and free of charges for authors. Our aim was to create a high quality journal, with a strict peer-review process, and complying with the transparency rules edicted by the DOAJ, COPE,... OAJ Materials and Devices-II Policy of the journal Materials and Devices is an Open Access (*) journal which publishes original, and peer-reviewed papers accessible only via internet, freely for all. Your published article can be freely downloaded, and self archiving of your paper is allowed! We apply « the principles of transparency and best practice in scholarly publishing » as defined by the Committee on Publication Ethics (COPE), the Directory of Open Access Journals (DOAJ), and the Open Access Scholarly Publishers Organization (OASPA). The journal has thus been worked out in such a way as complying with the requirements issued by OASPA and DOAJ in order to apply to these organizations. Evaluationpeer-reviewing : After reception, the paper is sent to two reviewers for evaluation. In case of divergent opinions of reviewers, the editor-in-chief sends the paper to a third reviewer and then gives a final decision based on all reports. Reviewers are asked to reply within three weeks to warranty a fast publication process.

The present document gathers communications given at the occasion of the following events: - The ... more The present document gathers communications given at the occasion of the following events: - The International Conference on Advanced Materials, Microscopy and Energy (ICAMME'19), that was held in the Faculty of Sciences University Moulay Ismail Meknes-Morocco in April 2019, it has gathered over 150 participants . This event has included different kinds of presentations given by researchers and experts from the national and international scientific community. It has covered a wide spectrum of topics. - A specialized spring school that was held before the Conference. The lectures during this school have covered fundamental and applied aspects related to Advanced Materials and Advanced Microscopy and spectroscopy techniques. The school was intended in order of priority to PhD students, Masters 2, Engineers and researchers.

IOP Conference Series: Materials Science and Engineering, Apr 10, 2020

In this paper the effect of penta-and hexa-vacancies defects on a vibrational properties of singl... more In this paper the effect of penta-and hexa-vacancies defects on a vibrational properties of single wall carbon nanotube (SWNT) was investigated. The bond-polarizability model combined with the spectral moments method are carried out to calculate the non-resonant Raman spectra. The changes of Raman spectra as a function of the nanotube chirality and the vacancies defects concentration on the wall of the nanotube are identified. The intensity ratio of D-band to G-band (I D /IG ratio) reflects the purity of SWNTs. Our study offers a means to distinguish between pristine and defective SWNTs even at low defect concentrations.

Crystals, 2018

We report the structures and the nonresonant Raman spectra of hybrid systems composed of carbon f... more We report the structures and the nonresonant Raman spectra of hybrid systems composed of carbon fullerenes (C 60 and C 70) encased within single walled boron nitride nanotube. The optimal structure of these systems are derived from total energy minimization using a convenient Lennard-Jones expression of the van der Waals intermolecular potential. The Raman spectra have been calculated as a function of nanotube diameter and fullerene concentration using the bond polarizability model combined with the spectral moment method. These results should be useful for the interpretation of the experimental Raman spectra of boron nitride nanotubes encasing C 60 and C 70 fullerenes.

2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET), 2020

In this work, we study the polarized infrared spectra of hybrid nanostructures (2T@SWCNTs) obtain... more In this work, we study the polarized infrared spectra of hybrid nanostructures (2T@SWCNTs) obtained by encapsulation of bithiophene (2T) in single wall carbon nanotube (SWCNTs). The calculation of the infrared spectrum is performed in the framework of the force constants model, using the spectral moments method. To derive the optimum configurations of 2T@SWCNTs, the minimum energy calculations using a convenient Lennard-Jones expression of the van der Waals intermolecular potential is devoted. The calculated results indicate that the minima correspond to nanotubes configurations with diameter close to 0.95 nm. A significant charge transfer on the inserted 2T was found by analyzing the infrared spectrum before and after encapsulation.

2022 2nd International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET), 2022

In this theoretical work, we study the Raman spectra of hydrogenated single walled carbon nanotub... more In this theoretical work, we study the Raman spectra of hydrogenated single walled carbon nanotubes (SWNTs) using the spectral moments method (SMM) coupled to the bond polarizability model. The effect of the C-H bond on the Raman modes of carbon nanotube are analyzed. Percentage of hydrogenation from 1% to 5%, are investigated. We found that the stretching modes of C-H bonds are clearly observed in the 2880-2900 cm-1 range and the Radial Breathing Mode (RBM) of SWNTs is more affected by the hydrogenated than the G-band. The reappearance of new Raman active modes in the D-band is also predicted as we increase the hydrogenation concentration.

HAL (Le Centre pour la Communication Scientifique Directe), Dec 1, 2019

The OAJ Materials and Devices is a journal created at the end oy 2016, devoted to all aspects of ... more The OAJ Materials and Devices is a journal created at the end oy 2016, devoted to all aspects of materials and related devices. It is Open Access and free of charges for authors. Our aim was to create a high quality journal, with a strict peer-review process, and complying with the transparency rules edicted by the DOAJ, COPE,... Policy of the journal Materials and Devices is an Open Access (*) journal which publishes original, and peer-reviewed papers accessible only via internet, freely for all. Your published article can be freely downloaded, and self archiving of your paper is allowed! We apply « the principles of transparency and best practice in scholarly publishing » as defined by the Committee on Publication Ethics (COPE), the Directory of Open Access Journals (DOAJ), and the Open Access Scholarly Publishers Organization (OASPA). The journal is now indexed by the DOAJ and listed by this organization. Evaluation-peer-reviewing : After reception, the paper is sent to reviewers for evaluation. In case of negative or divergent opinions of reviewers, the editor-in-chief sends the paper to another reviewer and then gives a final decision based on all reports. Reviewers are asked to reply within three weeks to warranty a fast publication process.

HAL (Le Centre pour la Communication Scientifique Directe), 2017

General informations Materials and Devices is a new journal devoted to all aspects of materials a... more General informations Materials and Devices is a new journal devoted to all aspects of materials and related devices. It is Open Access and free of charges for authors. Our aim was to create a high quality journal, with a strict peer-review process, and complying with the transparency rules edicted by the DOAJ, COPE,... OAJ Materials and Devices-II Policy of the journal Materials and Devices is an Open Access (*) journal which publishes original, and peer-reviewed papers accessible only via internet, freely for all. Your published article can be freely downloaded, and self archiving of your paper is allowed! We apply « the principles of transparency and best practice in scholarly publishing » as defined by the Committee on Publication Ethics (COPE), the Directory of Open Access Journals (DOAJ), and the Open Access Scholarly Publishers Organization (OASPA). The journal has thus been worked out in such a way as complying with the requirements issued by OASPA and DOAJ in order to apply to these organizations. Evaluationpeer-reviewing : After reception, the paper is sent to two reviewers for evaluation. In case of divergent opinions of reviewers, the editor-in-chief sends the paper to a third reviewer and then gives a final decision based on all reports. Reviewers are asked to reply within three weeks to warranty a fast publication process.

The present document gathers communications given at the occasion of the following events: - The ... more The present document gathers communications given at the occasion of the following events: - The International Conference on Advanced Materials, Microscopy and Energy (ICAMME'19), that was held in the Faculty of Sciences University Moulay Ismail Meknes-Morocco in April 2019, it has gathered over 150 participants . This event has included different kinds of presentations given by researchers and experts from the national and international scientific community. It has covered a wide spectrum of topics. - A specialized spring school that was held before the Conference. The lectures during this school have covered fundamental and applied aspects related to Advanced Materials and Advanced Microscopy and spectroscopy techniques. The school was intended in order of priority to PhD students, Masters 2, Engineers and researchers.

IOP Conference Series: Materials Science and Engineering, Apr 10, 2020

In this paper the effect of penta-and hexa-vacancies defects on a vibrational properties of singl... more In this paper the effect of penta-and hexa-vacancies defects on a vibrational properties of single wall carbon nanotube (SWNT) was investigated. The bond-polarizability model combined with the spectral moments method are carried out to calculate the non-resonant Raman spectra. The changes of Raman spectra as a function of the nanotube chirality and the vacancies defects concentration on the wall of the nanotube are identified. The intensity ratio of D-band to G-band (I D /IG ratio) reflects the purity of SWNTs. Our study offers a means to distinguish between pristine and defective SWNTs even at low defect concentrations.

Crystals, 2018

We report the structures and the nonresonant Raman spectra of hybrid systems composed of carbon f... more We report the structures and the nonresonant Raman spectra of hybrid systems composed of carbon fullerenes (C 60 and C 70) encased within single walled boron nitride nanotube. The optimal structure of these systems are derived from total energy minimization using a convenient Lennard-Jones expression of the van der Waals intermolecular potential. The Raman spectra have been calculated as a function of nanotube diameter and fullerene concentration using the bond polarizability model combined with the spectral moment method. These results should be useful for the interpretation of the experimental Raman spectra of boron nitride nanotubes encasing C 60 and C 70 fullerenes.

2020 1st International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET), 2020

In this work, we study the polarized infrared spectra of hybrid nanostructures (2T@SWCNTs) obtain... more In this work, we study the polarized infrared spectra of hybrid nanostructures (2T@SWCNTs) obtained by encapsulation of bithiophene (2T) in single wall carbon nanotube (SWCNTs). The calculation of the infrared spectrum is performed in the framework of the force constants model, using the spectral moments method. To derive the optimum configurations of 2T@SWCNTs, the minimum energy calculations using a convenient Lennard-Jones expression of the van der Waals intermolecular potential is devoted. The calculated results indicate that the minima correspond to nanotubes configurations with diameter close to 0.95 nm. A significant charge transfer on the inserted 2T was found by analyzing the infrared spectrum before and after encapsulation.