- Title
- Photophysical properties of a series of alloyed and non-alloyed water-soluble l-cysteine-capped core quantum dots
- Creator
- Adegoke, Oluwasesan, Nyokong, Tebello, Forbes, Patricia B
- Subject
- To be catalogued
- Date
- 2017
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/188486
- Identifier
- vital:44758
- Identifier
- xlink:href="https://doi.org/10.1016/j.jallcom.2016.10.276"
- Description
- Photophysical properties of quantum dots (QDs) such as their photoluminescence (PL) quantum yield (QY), exciton lifetime and PL stability are important parameters used to unravel their chemical and physical characteristics. In this work, we have comparatively investigated the photophysical properties of a series of L-cysteine-capped non-alloyed (CdTe and CdSe) and alloyed (CdZnTe, CdSeS, CdSeTe and CdSeTeS) core QDs. Each of the QDs varied in their size and PL emission wavelength. We observe no physical relationship between the PL QY of the QDs and their PL stability. Based on the PL stability assessment, CdTe QDs with a high PL QY value of 88% exhibited poor PL stability while moderate PL stability was observed for CdZnTe (QY = 78%); CdSe (QY = 3%); and CdSeTe QDs (QY = ∼3%). Alloyed CdSeS (QY = ∼69%) and CdSeTeS (QY = 23%) QDs exhibited good PL stability and can serve as potential fluorophores for a wide range of chemical and biological applications. Generally, it is proposed that the structural nature of the QDs played a significant role in their overall photophysical properties. The information provided in this work will assist in the selection of core QDs suitable for different applications.
- Format
- computer, online resource, application/pdf, 1 online resource (8 pages), pdf
- Publisher
- Elsevier
- Language
- English
- Relation
- Journal of Alloys and Compounds, Adegoke, O., Nyokong, T. and Forbes, P.B., 2017. Photophysical properties of a series of alloyed and non-alloyed water-soluble l-cysteine-capped core quantum dots. Journal of Alloys and Compounds, 695, pp.1354-1361, Journal of Alloys and Compounds volume 695 p. 1354 2017 0925-8388
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Elsevier Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
- Rights
- Closed Access
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RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Photophysical properties of a series of alloyed and non-alloyed water-soluble l-cysteine-capped core quantum dots.pdf | 720 KB | Adobe Acrobat PDF | View Details Download |