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

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)5925-5932
Number of pages8
JournalJournal of Materials Chemistry B
Issue number43
Publication statusPublished - Dec 21 2013

ASJC Scopus subject areas

  • Chemistry(all)
  • Biomedical Engineering
  • Medicine(all)
  • Materials Science(all)


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