Spatial conductivity mapping of carbon nanotube composite thin films by electrical impedance tomography for sensing applications

Tsung Chin Hou, Kenneth J. Loh, Jerome P. Lynch

研究成果: Article同行評審

125 引文 斯高帕斯(Scopus)

摘要

This paper describes the application of electrical impedance tomography (EIT) to demonstrate the multifunctionality of carbon nanocomposite thin films under various types of environmental stimuli. Carbon nanotube (CNT) thin films are fabricated by a layer-by-layer (LbL) technique and mounted with electrodes along their boundaries. The response of the thin films to various stimuli is investigated by relying on electric current excitation and corresponding boundary potential measurements. The spatial conductivity variations are reconstructed based on a mathematical model for the EIT technique. Here, the ability of the EIT method to provide two-dimensional mapping of the conductivity of CNT thin films is validated by (1) electrically imaging intentional structural defects in the thin films and (2) mapping the film's response to various pH environments. The ability to spatially image the conductivity of CNT thin films holds many promises for developing multifunctional CNT-based sensing skins.

原文English
文章編號315501
期刊Nanotechnology
18
發行號31
DOIs
出版狀態Published - 2007 8月 8

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 化學 (全部)
  • 材料科學(全部)
  • 材料力學
  • 機械工業
  • 電氣與電子工程

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