TY - JOUR
T1 - Dendritic platinum-decorated gold nanoparticles for non-enzymatic glucose biosensing
AU - Chen, Kuan Jung
AU - Su, Wei Nien
AU - Pan, Chun Jern
AU - Cheng, Shou Yi
AU - Rick, John
AU - Wang, Shih Han
AU - Liu, Chung Chiun
AU - Chang, Chun Chao
AU - Yang, Yaw Wen
AU - Wang, Chia Hsin
AU - Hwang, Bing Joe
PY - 2013/12/21
Y1 - 2013/12/21
N2 - A bimetallic amperometric sensor comprising a dendritic Pt shell formed on rod-shaped Au cores (Aurod@Pt) for the rapid estimation of glucose by direct electro-oxidation under physiological conditions is reported. The materials were characterized by XRD, TEM, UV-vis, and cyclic voltammetry. The sensor was constructed by immobilizing Aurod@Pt bimetallic nanoparticles, in a Nafion film, on a glassy carbon electrode (Nafion/Au rod@Pt/GCE). The results showed that Aurod@Pt nanoparticles provided significantly higher sensitivity compared to dendritic Pt. X-ray absorption spectroscopy and X-ray photoelectron spectroscopy suggested that electron transfer, from the Au core to dendritic Pt, resulted in significant enhancement of electrocatalytic activity, due to reduction in Pt absorption of glucose oxidation intermediates and Cl- ions. In addition, Nafion/Aurod@Pt/GCE was found to exhibit a low working potential, fast amperometric response, high sensitivity, good reproducibility, good long term stability, and a high specificity to glucose with negligible interference from uric acid, ascorbic acid, acetamidophenol, or chloride ions.
AB - A bimetallic amperometric sensor comprising a dendritic Pt shell formed on rod-shaped Au cores (Aurod@Pt) for the rapid estimation of glucose by direct electro-oxidation under physiological conditions is reported. The materials were characterized by XRD, TEM, UV-vis, and cyclic voltammetry. The sensor was constructed by immobilizing Aurod@Pt bimetallic nanoparticles, in a Nafion film, on a glassy carbon electrode (Nafion/Au rod@Pt/GCE). The results showed that Aurod@Pt nanoparticles provided significantly higher sensitivity compared to dendritic Pt. X-ray absorption spectroscopy and X-ray photoelectron spectroscopy suggested that electron transfer, from the Au core to dendritic Pt, resulted in significant enhancement of electrocatalytic activity, due to reduction in Pt absorption of glucose oxidation intermediates and Cl- ions. In addition, Nafion/Aurod@Pt/GCE was found to exhibit a low working potential, fast amperometric response, high sensitivity, good reproducibility, good long term stability, and a high specificity to glucose with negligible interference from uric acid, ascorbic acid, acetamidophenol, or chloride ions.
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U2 - 10.1039/c3tb20903b
DO - 10.1039/c3tb20903b
M3 - Article
AN - SCOPUS:84887052527
SN - 2050-7518
VL - 1
SP - 5925
EP - 5932
JO - Journal of Materials Chemistry B
JF - Journal of Materials Chemistry B
IS - 43
ER -