- Title
- The interaction between graphene quantum dots grafted with polyethyleneimine and Au@ Ag nanoparticles
- Creator
- Achadu, Ojodomo John, Uddin, Imran, Nyokong, Tebello
- Subject
- To be catalogued
- Date
- 2016
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/188679
- Identifier
- vital:44775
- Identifier
- xlink:href="https://doi.org/10.1016/j.jphotochem.2016.03.016"
- Description
- Graphene quantum dots grafted with polyethyleneimine (GQDs-PEI) and Au@Ag core-shell nanoparticles blend was demonstrated to be a novel biosensing nanoprobe for the rapid and highly sensitive detection of biothiols such as cysteine (Cys), homocysteine (Hcys) and glutathione (GSH). The fluorescence emission of GQDs-PEI was quenched efficiently upon interaction with Au@Ag core-shell nanoparticles. The quenched fluorescence emission of the GQDs-PEI was restored in the presence of the biothiols. The fluorimetric sensing is based on the strong affinity between the mercapto (SH) groups of the biothiols and the Au@Ag core-shell nanoparticles by which the interaction between GQDs-PEI and Au@Ag core-shell nanoparticles was disrupted with a consequent modulation (‘turn-on’) of the quenched GQDs-PEI emission. Thus, a new, simple, rapid and highly sensitive fluorescence nanoprobe for detecting biothiols has been developed in this work.
- Format
- computer, online resource, application/pdf, 1 online resource (10 pages), pdf
- Publisher
- Elsevier
- Language
- English
- Relation
- Journal of Photochemistry and Photobiology A: Chemistry, Achadu, O.J., Uddin, I. and Nyokong, T., 2016. The interaction between graphene quantum dots grafted with polyethyleneimine and Au@ Ag nanoparticles: Application as a fluorescence “turn-on” nanoprobe. Journal of Photochemistry and Photobiology A: Chemistry, 324, pp.96-105, Journal of Photochemistry and Photobiology A: Chemistry volume 324 p. 96 2016 1010-6030
- 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
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