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Graphene Quantum Dots Anchored Gold Nanorods for Electrochemical Detection of Glutathione
Author(s) -
Vinoth Victor,
Rozario Tanya Maria D',
Wu Jerry J,
Anandan Sambandam,
Ashokkumar Muthupandian
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700845
Subject(s) - nanorod , graphene , high resolution transmission electron microscopy , raman spectroscopy , quantum dot , fourier transform infrared spectroscopy , materials science , spectroscopy , bromide , transmission electron microscopy , detection limit , nanotechnology , electrochemistry , chemical engineering , analytical chemistry (journal) , chemistry , nuclear chemistry , inorganic chemistry , organic chemistry , chromatography , electrode , optics , physics , engineering , quantum mechanics
In this manuscript, graphene quantum dots (GQDs) anchored gold nanorods (AuNRs) were prepared using a simple strategy. The formation of such hybrid materials was attained by mixing the GQDs (∼2 ‐ 4 nm) and Cetyltrimethylammonium bromide (CTAB) capped AuNRs (length: 40 ± 3 and width: 20 ± 2 nm) under ultrasonication. The formation of GQDs anchored on the Au nanorod surface was confirmed using UV‐Vis spectroscopy, X‐ray diraction (XRD), Raman spectroscopy, high‐resolution transmission electron microscopy (HRTEM) and atomic force microscope (AFM). The possible complexation between acid groups of GQDs and CTAB capped AuNRs was utilized to reveal by FTIR spectroscopy. Such CTAB‐AuNRs‐GQDs possess catalytic surface with a high electrocatalytic activity, high sensitivity and selectivity for electrochemical determination of Glutathione (GSH) with a low detection limit of 0.23 μM and sensitivity of 1.49 μAμM −1 . Prominently, the CTAB‐AuNRs‐GQDs‐based electrochemical biosensor has revealed great potential application for determination of GSH levels in real samples.