Impedance characterization of nanogap interdigitated electrode arrays fabricated by tilted angle evaporation for electrochemical biosensor applications

Dae Young Jeon, So Jeong Park, Yongha Kim, Min Ju Shin, Pil Soo Kang, Gyu Tae Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nanogap interdigitated electrode (IDE) arrays were fabricated by tilted angle evaporation on dry etch SiO2 substrates, suggesting a simple, inexpensive, and controllable fabrication technique. The impedance characteristics in a KCl solution clearly showed the differences between nanogap and microscaled IDEs in terms of the peak positions of the phase shift and the ratio of the resistance amplitudes. Moreover, the effect of imperfections on the edge of electrodes was quantitatively discussed through the analysis of electric-field based on finite element method. Our results provide a better understanding of impedance behavior of nanogap IDE arrays for high-performance biochemical applications.

Original languageEnglish
Article number021803
JournalJournal of Vacuum Science and Technology B:Nanotechnology and Microelectronics
Volume32
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

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