Dendritic platinum-decorated gold nanoparticles for non-enzymatic glucose biosensing

Kuan-Jung Chen; Wei-Nien Su; Chun-Jern Pan; Shou-Yi Cheng; John Rick; Shih-Han Wang; Chung-Chiun Liu; Chun-Chao Chang; Yaw-Wen Yang; Chia-Hsin Wang; Bing-Joe Hwang

doi:10.1039/C3TB20903B

Dendritic platinum-decorated gold nanoparticles for non-enzymatic glucose biosensing†

Kuan-Jung Chen,^a Wei-Nien Su,^b Chun-Jern Pan,^a Shou-Yi Cheng,^a John Rick,^a Shih-Han Wang,^c Chung-Chiun Liu,^d Chun-Chao Chang,*^e Yaw-Wen Yang,^f Chia-Hsin Wang^f and Bing-Joe Hwang*^af

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* Corresponding authors

^a Nanoelectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
E-mail: bjh@mail.ntust.edu.tw
Fax: +886-2-27376644

^b NanoElectrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan

^c Department of Chemical Engineering, I-Shou University, Kaohsiung County 84001, Taiwan

^d Department of Chemical Engineering and Electronics Design Center, Case Western Reserve University, 10900 Euclid Avenue, OH44106, USA

^e Taipei Medical University, Taipei 250, Taiwan, R. O. C
E-mail: chunchao@tmu.edu.tw
Fax: +886-2-27363051

^f National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan

Abstract

A bimetallic amperometric sensor comprising a dendritic Pt shell formed on rod-shaped Au cores (Au_rod@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 Au_rod@Pt bimetallic nanoparticles, in a Nafion film, on a glassy carbon electrode (Nafion/Au_rod@Pt/GCE). The results showed that Au_rod@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/Au_rod@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.

Journal of Materials Chemistry B

Dendritic platinum-decorated gold nanoparticles for non-enzymatic glucose biosensing†

Abstract

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Dendritic platinum-decorated gold nanoparticles for non-enzymatic glucose biosensing

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