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Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films
A simple and modified top-down approach to synthesize molybdenum oxide (MoO(x): x = 2, 3) quantum dots (QDs) is proposed in this study. This modified approach involves the conversion of a bulk powder material into thin films followed by a sonication induced chemical etching process for synthesising...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9048723/ https://www.ncbi.nlm.nih.gov/pubmed/35497721 http://dx.doi.org/10.1039/c9ra09773b |
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author | Borah, Dibya Jyoti Mostako, Abu Talat Tahir Borgogoi, Angshuman Thunder Saikia, Prasanta Kumar Malakar, Ashim |
author_facet | Borah, Dibya Jyoti Mostako, Abu Talat Tahir Borgogoi, Angshuman Thunder Saikia, Prasanta Kumar Malakar, Ashim |
author_sort | Borah, Dibya Jyoti |
collection | PubMed |
description | A simple and modified top-down approach to synthesize molybdenum oxide (MoO(x): x = 2, 3) quantum dots (QDs) is proposed in this study. This modified approach involves the conversion of a bulk powder material into thin films followed by a sonication induced chemical etching process for synthesising QDs. X-Ray Diffraction (XRD) is used for crystal structural characterization of MoO(x) thin films. The crystal structure properties of the MoO(x) QDs are analysed by High Resolution Transmission Electron Microscopy (HRTEM) images and corresponding Selected Area Electron Diffraction (SAED) patterns. The optical band gap is estimated by Tauc's plot from UV-Vis-NIR absorption spectra. The excitation dependent photoluminescence (PL) emission of MoO(x) QDs as a function of acid concentration is investigated. The growth mechanism of QDs in different crystalline phases as a function of acid concentration is also exemplified in this work. The micro-Raman and Fourier Transform of Infrared (FTIR) spectra are recorded to analyse the vibrational spectrum of the molybdenum–oxygen (Mo–O) bonds in the MoO(x) QDs. |
format | Online Article Text |
id | pubmed-9048723 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90487232022-04-28 Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films Borah, Dibya Jyoti Mostako, Abu Talat Tahir Borgogoi, Angshuman Thunder Saikia, Prasanta Kumar Malakar, Ashim RSC Adv Chemistry A simple and modified top-down approach to synthesize molybdenum oxide (MoO(x): x = 2, 3) quantum dots (QDs) is proposed in this study. This modified approach involves the conversion of a bulk powder material into thin films followed by a sonication induced chemical etching process for synthesising QDs. X-Ray Diffraction (XRD) is used for crystal structural characterization of MoO(x) thin films. The crystal structure properties of the MoO(x) QDs are analysed by High Resolution Transmission Electron Microscopy (HRTEM) images and corresponding Selected Area Electron Diffraction (SAED) patterns. The optical band gap is estimated by Tauc's plot from UV-Vis-NIR absorption spectra. The excitation dependent photoluminescence (PL) emission of MoO(x) QDs as a function of acid concentration is investigated. The growth mechanism of QDs in different crystalline phases as a function of acid concentration is also exemplified in this work. The micro-Raman and Fourier Transform of Infrared (FTIR) spectra are recorded to analyse the vibrational spectrum of the molybdenum–oxygen (Mo–O) bonds in the MoO(x) QDs. The Royal Society of Chemistry 2020-01-17 /pmc/articles/PMC9048723/ /pubmed/35497721 http://dx.doi.org/10.1039/c9ra09773b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Borah, Dibya Jyoti Mostako, Abu Talat Tahir Borgogoi, Angshuman Thunder Saikia, Prasanta Kumar Malakar, Ashim Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films |
title | Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films |
title_full | Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films |
title_fullStr | Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films |
title_full_unstemmed | Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films |
title_short | Modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films |
title_sort | modified top-down approach for synthesis of molybdenum oxide quantum dots: sonication induced chemical etching of thin films |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9048723/ https://www.ncbi.nlm.nih.gov/pubmed/35497721 http://dx.doi.org/10.1039/c9ra09773b |
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