Equivalent Circuit Models for Determination of the Relation between the Sensing Behavior and Properties of Undoped/Cr Doped TiO2 NTs

Chemosensors

Yakup Gönüllü²  Klemens Kelm²  Sanjay Mathur¹ 

[1] University of Cologne, Institute of Inorganic Chemistry, 50939 Cologne, Germany; E-Mails:;German Aerospace Center (DLR), Institute of Materials Research, 51147 Cologne, Germany; E-Mail:

关键词: Cr doping;    TiO₂ Nanotubes;    gas sensors;    equivalent circuit model;   

DOI  :  10.3390/chemosensors2010069

来源: mdpi

【 摘 要 】

High-temperature gas sensing requires the increase of sensitivity and reduction of cross-sensitivity. The use of TiO₂-Nanotubular layers as gas sensors has shown that the selectivity and sensitivity can be influenced by doping with trivalent elements and by optimization of morphological aspects such as pore diameter and nanotube length. In this work, focus has been given on the understanding of the effect of doping and properties of nano-tubular TiO₂-layers on sensing behavior and mechanism toward NO₂ by using equivalent circuit modeling achieved by impedance spectroscopic measurements.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.