Bright, stable, and water-soluble CuInS2/ZnS nanocrystals passivated by cetyltrimethylammonium bromide
- Authors
- Lee, Jun; Han, Chang-Soo
- Issue Date
- 20-3월-2015
- Publisher
- SPRINGEROPEN
- Keywords
- CuInS2/ZnS nanocrystals; CTAB; Photostability; Cold treatment
- Citation
- NANOSCALE RESEARCH LETTERS, v.10
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE RESEARCH LETTERS
- Volume
- 10
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/94104
- DOI
- 10.1186/s11671-015-0836-0
- ISSN
- 1931-7573
- Abstract
- We report a highly bright and stable aqueous dispersion of CuInS2/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 degrees 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.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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