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Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals
In recent years, interest in the liquid-phase exfoliation (LPE) of layered crystals has been growing due to the efficiency and scalability of the method, as well as the wide range of practical applications of the obtained dispersions based on two-dimensional flakes. In this paper, we present a compa...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9605154/ https://www.ncbi.nlm.nih.gov/pubmed/36295149 http://dx.doi.org/10.3390/ma15207080 |
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author | Aitzhanov, Madi Guseinov, Nazim Nemkayeva, Renata Sagidolda, Yerulan Tolepov, Zhandos Prikhodko, Oleg Mukhametkarimov, Yerzhan |
author_facet | Aitzhanov, Madi Guseinov, Nazim Nemkayeva, Renata Sagidolda, Yerulan Tolepov, Zhandos Prikhodko, Oleg Mukhametkarimov, Yerzhan |
author_sort | Aitzhanov, Madi |
collection | PubMed |
description | In recent years, interest in the liquid-phase exfoliation (LPE) of layered crystals has been growing due to the efficiency and scalability of the method, as well as the wide range of practical applications of the obtained dispersions based on two-dimensional flakes. In this paper, we present a comparative study of as-grown and liquid-phase exfoliated GaSe(1−x)S(x) flakes. Bulk GaSe(1−x)S(x) crystals with x ~ 0, 0.25, 0.5, 0.75, 1 were synthesized by melting stoichiometric amounts of gallium, selenium, and sulfur particles in evacuated ampoules. X-ray diffraction analysis showed that the crystal structure does not change considerably after LPE, while the analysis of the Raman spectra revealed that, after liquid-phase processing in IPA, an additional peak associated with amorphous selenium is observed in selenium-rich GaSeS compounds. Nevertheless, the direct and indirect transition energies determined from the Kubelka-Munk function for LPE crystals correlate with the band gap of the as-grown bulk GaSeS crystals. This finding is also confirmed by comparison with the data on the positions of the photoluminescence peak. |
format | Online Article Text |
id | pubmed-9605154 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96051542022-10-27 Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals Aitzhanov, Madi Guseinov, Nazim Nemkayeva, Renata Sagidolda, Yerulan Tolepov, Zhandos Prikhodko, Oleg Mukhametkarimov, Yerzhan Materials (Basel) Article In recent years, interest in the liquid-phase exfoliation (LPE) of layered crystals has been growing due to the efficiency and scalability of the method, as well as the wide range of practical applications of the obtained dispersions based on two-dimensional flakes. In this paper, we present a comparative study of as-grown and liquid-phase exfoliated GaSe(1−x)S(x) flakes. Bulk GaSe(1−x)S(x) crystals with x ~ 0, 0.25, 0.5, 0.75, 1 were synthesized by melting stoichiometric amounts of gallium, selenium, and sulfur particles in evacuated ampoules. X-ray diffraction analysis showed that the crystal structure does not change considerably after LPE, while the analysis of the Raman spectra revealed that, after liquid-phase processing in IPA, an additional peak associated with amorphous selenium is observed in selenium-rich GaSeS compounds. Nevertheless, the direct and indirect transition energies determined from the Kubelka-Munk function for LPE crystals correlate with the band gap of the as-grown bulk GaSeS crystals. This finding is also confirmed by comparison with the data on the positions of the photoluminescence peak. MDPI 2022-10-12 /pmc/articles/PMC9605154/ /pubmed/36295149 http://dx.doi.org/10.3390/ma15207080 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Aitzhanov, Madi Guseinov, Nazim Nemkayeva, Renata Sagidolda, Yerulan Tolepov, Zhandos Prikhodko, Oleg Mukhametkarimov, Yerzhan Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals |
title | Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals |
title_full | Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals |
title_fullStr | Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals |
title_full_unstemmed | Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals |
title_short | Growth and Liquid-Phase Exfoliation of GaSe(1−x)S(x) Crystals |
title_sort | growth and liquid-phase exfoliation of gase(1−x)s(x) crystals |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9605154/ https://www.ncbi.nlm.nih.gov/pubmed/36295149 http://dx.doi.org/10.3390/ma15207080 |
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