Electrochemical characterization of InN thin films for biosensing applications

Antonio M. Basilio, Yu Kuei Hsu, C. C. Chang, P. C. Wei, Abhijit Ganguly, H. C. Shih, Yit Tsong Chen, Li Chyong Chen, Kuei Hsien Chen

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

InN, a well-established optoelectronic material, is currently being considered as a promising material for sensor applications. In this study, the fundamental electrochemical properties of InN thin film and its potential for electrode chemical and bio-sensing applications are demonstrated. The cyclic voltammograms of different concentrations of dopamine solution in 1 M HClO 4 were measured. Similarly, potentiostatic measurements at 1 V versus Ag/AgCl show stable responses and linear change of current density with concentrations up to 0.475 mM dopamine. The InN thin film also demonstrated repeatable positive photoresponse to cathodic currents in 1 mM Ru(NH 3)6 3+ in 1M KCl solution under a 100 mW cm-2 808-nm laser light illumination at a constant -0.25 V (vs. Ag/AgCl) bias. The cathodic current response showed a 27% enhancement, demonstrating its potential as photocathode. This cathodic photocurrent behavior is explained through the electron accumulation of the InN material.

Original languageEnglish
Pages (from-to)337-343
Number of pages7
JournalJournal of New Materials for Electrochemical Systems
Volume13
Issue number4
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrochemistry

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