Gold nanostructures on flexible substrates as electrochemical dopamine sensors

Ming Sheng Hsu, Yu Liang Chen, Chi Young Lee, Hsin-Tien Chiu*

*Corresponding author for this work

Research output: Contribution to journalArticle

91 Scopus citations

Abstract

In this study, we fabricated Au nanowires (NWs), nanoslices (NSs), and nanocorals (NCs) on flexible polyethylene terephthalate (PET) substrates via direct current electrochemical depositions. Without any surface modification, the Au nanostructures were used as the electrodes for dopamine (DA) sensing. Among them, the Au NW electrode performed exceptionally well. The determined linear range for DA detection was 0.2-600 μM (N = 3) and the sensitivity was 178 nA/μM cm 2, while the detection limit was 26 nM (S/N = 3). After 10 repeated measurements, 95% of the original anodic current values were maintained for the nanostructured electrodes. Sequential additions of citric acid (CA, 1 mM), uric acid (UA, saturated), and ascorbic acid (AA, 1 μM) did not interfere the amperometric response from the addition of DA (0.1 μM).

Original languageEnglish
Pages (from-to)5570-5575
Number of pages6
JournalACS Applied Materials and Interfaces
Volume4
Issue number10
DOIs
StatePublished - 24 Oct 2012

Keywords

  • dopamine
  • electrodeposition
  • gold
  • nanocoral
  • nanoslice
  • nanowire
  • sensor

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