Open AccessTurn‐on fluorescent probe for Cd 2+ detection by gold nanoclusters/graphene oxide nanocomplex
Author(s) -
Ju Cheng,
Gong Xiang,
Song Wenhao,
Zhao Yu,
Li Ruijun
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0637
Subject(s) - nanoclusters , graphene , fluorescence , bovine serum albumin , oxide , chemistry , quenching (fluorescence) , aqueous solution , photochemistry , analytical chemistry (journal) , materials science , nanotechnology , chromatography , organic chemistry , physics , quantum mechanics
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 Cd 2+ . 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 Cd 2+ , 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 Cd 2+ in the aqueous samples.