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Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide
We report a highly bright and stable aqueous dispersion of CuInS(2)/ZnS (CIS/ZnS) nanocrystals (NCs) using surfactant-assisted microemulsion and cold treatment. CIS/ZnS NCs were facilely synthesized via a stepwise, consecutive hybrid flow reactor approach. To stabilize the optical properties of hydr...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4385304/ https://www.ncbi.nlm.nih.gov/pubmed/25852434 http://dx.doi.org/10.1186/s11671-015-0836-0 |
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author | Lee, Jun Han, Chang-Soo |
author_facet | Lee, Jun Han, Chang-Soo |
author_sort | Lee, Jun |
collection | PubMed |
description | We report a highly bright and stable aqueous dispersion of CuInS(2)/ZnS (CIS/ZnS) nanocrystals (NCs) using surfactant-assisted microemulsion and cold treatment. CIS/ZnS NCs were facilely synthesized via a stepwise, consecutive hybrid flow reactor approach. To stabilize the optical properties of hydrophobic CIS/ZnS NCs, cetyltrimethylammonium bromide (CTAB) was chosen as a matrix for aqueous phase transfer. As the result, a high quantum yield (QY) of 56.0% and excellent photostability were acquired in aqueous media. For removing excessive surfactants, cold treatment (4°C) of the CTAB-water solution was adopted to prevent further agglomeration of CIS/ZnS NCs, which could secure high stability over 6 months (less 2% reduction in QY). The optical features and structure of the obtained CTAB stabilized CIS/ZnS (CTAB-CIS/ZnS) NCs have been characterized by UV–vis and photoluminescence (PL) spectroscopies, XRD, XPS, EDX, and TEM. The high stability and PL of water soluble CTAB-CIS/ZnS NCs suggest their potential in nanoelectronics and bioapplications. |
format | Online Article Text |
id | pubmed-4385304 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-43853042015-04-07 Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide Lee, Jun Han, Chang-Soo Nanoscale Res Lett Nano Express We report a highly bright and stable aqueous dispersion of CuInS(2)/ZnS (CIS/ZnS) nanocrystals (NCs) using surfactant-assisted microemulsion and cold treatment. CIS/ZnS NCs were facilely synthesized via a stepwise, consecutive hybrid flow reactor approach. To stabilize the optical properties of hydrophobic CIS/ZnS NCs, cetyltrimethylammonium bromide (CTAB) was chosen as a matrix for aqueous phase transfer. As the result, a high quantum yield (QY) of 56.0% and excellent photostability were acquired in aqueous media. For removing excessive surfactants, cold treatment (4°C) of the CTAB-water solution was adopted to prevent further agglomeration of CIS/ZnS NCs, which could secure high stability over 6 months (less 2% reduction in QY). The optical features and structure of the obtained CTAB stabilized CIS/ZnS (CTAB-CIS/ZnS) NCs have been characterized by UV–vis and photoluminescence (PL) spectroscopies, XRD, XPS, EDX, and TEM. The high stability and PL of water soluble CTAB-CIS/ZnS NCs suggest their potential in nanoelectronics and bioapplications. Springer US 2015-03-20 /pmc/articles/PMC4385304/ /pubmed/25852434 http://dx.doi.org/10.1186/s11671-015-0836-0 Text en © Lee and Han; licensee Springer. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. |
spellingShingle | Nano Express Lee, Jun Han, Chang-Soo Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide |
title | Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide |
title_full | Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide |
title_fullStr | Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide |
title_full_unstemmed | Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide |
title_short | Bright, stable, and water-soluble CuInS(2)/ZnS nanocrystals passivated by cetyltrimethylammonium bromide |
title_sort | bright, stable, and water-soluble cuins(2)/zns nanocrystals passivated by cetyltrimethylammonium bromide |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4385304/ https://www.ncbi.nlm.nih.gov/pubmed/25852434 http://dx.doi.org/10.1186/s11671-015-0836-0 |
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