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Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals
Highly monodisperse colloidal InAs quantum dots (QDs) with superior optoelectronic properties are promising candidates for various applications, including infrared photodetectors and photovoltaics. Recently, a synthetic process involving continuous injection has been introduced to synthesize uniform...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8140152/ https://www.ncbi.nlm.nih.gov/pubmed/34021149 http://dx.doi.org/10.1038/s41467-021-23259-w |
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author | Kim, Taewan Park, Seongmin Jeong, Sohee |
author_facet | Kim, Taewan Park, Seongmin Jeong, Sohee |
author_sort | Kim, Taewan |
collection | PubMed |
description | Highly monodisperse colloidal InAs quantum dots (QDs) with superior optoelectronic properties are promising candidates for various applications, including infrared photodetectors and photovoltaics. Recently, a synthetic process involving continuous injection has been introduced to synthesize uniformly sized InAs QDs. Still, synthetic efforts to increase the particle size of over 5 nm often suffer from growth suppression. Secondary nucleation or interparticle ripening during the growth accompanies the inhomogeneity in size as well. In this study, we propose a growth model for the continuous synthetic processing of colloidal InAs QDs based on molecular diffusion. The experimentally validated model demonstrates how precursor solution injection reduces monomer flux, limiting particle growth during synthesis. As predicted by our model, we control the diffusion dynamics by tuning reaction volume, precursor concentration, and injection rate of precursor. Through diffusion-dynamics-control in the continuous process, we synthesize the InAs QDs with a size over 9.0-nm (1S(max) of 1600 nm) with a narrow size distribution (12.2%). Diffusion-dynamics-controlled synthesis presented in this study effectively manages the monomer flux and thus overcome monomer-reactivity-originating size limit of nanocrystal growth in solution. |
format | Online Article Text |
id | pubmed-8140152 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-81401522021-06-07 Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals Kim, Taewan Park, Seongmin Jeong, Sohee Nat Commun Article Highly monodisperse colloidal InAs quantum dots (QDs) with superior optoelectronic properties are promising candidates for various applications, including infrared photodetectors and photovoltaics. Recently, a synthetic process involving continuous injection has been introduced to synthesize uniformly sized InAs QDs. Still, synthetic efforts to increase the particle size of over 5 nm often suffer from growth suppression. Secondary nucleation or interparticle ripening during the growth accompanies the inhomogeneity in size as well. In this study, we propose a growth model for the continuous synthetic processing of colloidal InAs QDs based on molecular diffusion. The experimentally validated model demonstrates how precursor solution injection reduces monomer flux, limiting particle growth during synthesis. As predicted by our model, we control the diffusion dynamics by tuning reaction volume, precursor concentration, and injection rate of precursor. Through diffusion-dynamics-control in the continuous process, we synthesize the InAs QDs with a size over 9.0-nm (1S(max) of 1600 nm) with a narrow size distribution (12.2%). Diffusion-dynamics-controlled synthesis presented in this study effectively manages the monomer flux and thus overcome monomer-reactivity-originating size limit of nanocrystal growth in solution. Nature Publishing Group UK 2021-05-21 /pmc/articles/PMC8140152/ /pubmed/34021149 http://dx.doi.org/10.1038/s41467-021-23259-w Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Kim, Taewan Park, Seongmin Jeong, Sohee Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals |
title | Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals |
title_full | Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals |
title_fullStr | Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals |
title_full_unstemmed | Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals |
title_short | Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals |
title_sort | diffusion dynamics controlled colloidal synthesis of highly monodisperse inas nanocrystals |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8140152/ https://www.ncbi.nlm.nih.gov/pubmed/34021149 http://dx.doi.org/10.1038/s41467-021-23259-w |
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