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Title: Nanochannel-confined graphene quantum dots for ultrasensitive electrochemical analysis of complex samples
Authors: Lu, Lili
Zhou, Lin
Chen, Jie
Yan, Fei
Liu, Jiyang
Dong, Xiaoping
Xi, Fengna
Chen, Peng
Keywords: Engineering::Chemical engineering
Issue Date: 2018
Source: Lu, L., Zhou, L., Chen, J., Yan, F., Liu, J., Dong, X., . . . Chen, P. (2018). Nanochannel-confined graphene quantum dots for ultrasensitive electrochemical analysis of complex samples. ACS Nano, 12(12), 12673-12681. doi:10.1021/acsnano.8b07564
Journal: ACS Nano
Abstract: Herein, we present an electrochemical sensing platform based on nanochannel-confined graphene quantum dots (GQDs) that is able to detect a spectrum of small analytes in complex samples with high sensitivity. Vertically ordered mesoporous silica-nanochannel film (VMSF) is decorated on the supporting electrode, conferring the electrode with excellent antifouling and anti-interference properties through steric exclusion and electrostatic repulsion. The synthesized GQDs with different functionalities are confined in the nanochannels of VMSF through electrophoresis, serving as the recognition element and signal amplifier. Without the usual need of tedious pretreatment, ultrasensitive and fast detection of Hg2+, Cu2+, and Cd2+ (with limits of detection (LOD) of 9.8 pM, 8.3 pM, and 4.3 nM, respectively) and dopamine (LOD of 120 nM) in complex food (Hg2+-contaminated seafood), environmental (soil-leaching solution), and biological (serum) samples are realized as proof-of-concept demonstrations.
ISSN: 1936-0851
DOI: 10.1021/acsnano.8b07564
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles


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