Turn-on fluorescent probe for Cd2+ detection by gold nanoclusters/graphene oxide nanocomplex

Cheng Ju; Xiang Gong; Wenhao Song; Yu Zhao; Ruijun Li

Turn-on fluorescent probe for Cd²⁺ detection by gold nanoclusters/graphene oxide nanocomplex

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Author(s): Cheng Ju¹ ; Xiang Gong¹ ; Wenhao Song¹ ; Yu Zhao¹ ; Ruijun Li¹
- Affiliations: 1: Department of Analytical Chemistry , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
Source: Volume 13, Issue 6, June 2018, p. 804 – 806
DOI: 10.1049/mnl.2017.0637 , Online ISSN 1750-0443

Received 26/08/2017, Accepted 28/02/2018, Revised 27/01/2018, Published 01/06/2018

This work reported the fabrication of bovine serum albumin stabilised gold nanoclusters (BSA-Au NCs)–graphene oxide nanocomplex (BSA-Au NCs-GO) as a ‘turn-on’ fluorescent probe for the detection of Cd²⁺. The prepared BSA-Au NCs showed an intense red fluorescence, and the fluorescence of BSA-Au NCs was reduced significantly by graphene oxide due to its excellent quenching properties. However, in the presence of 65 µmol l⁻¹ Cd²⁺, the fluorescence intensity recovered to 82.5% of the intensity of BSA-Au NCs, and the fluorescence intensity increased 1.3-fold relative to the BSA-Au NCs-GO nanocomplex. This proposed probe expands the application of BSA-Au NCs, which can be used as a reversible fluorescence nanoswitch for inexpensive, label free and simple detection of Cd²⁺ in the aqueous samples.

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Turn-on fluorescent probe for Cd²⁺ detection by gold nanoclusters/graphene oxide nanocomplex

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