Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 135, Issue 1, Pages 317-321Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.08.042
Keywords
Titanate; Humidity sensor; Impedance
Funding
- National Basic Research Program of China [2005 CB724400]
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Na2Ti3O7 nanowires have been synthesized by a simple hydrothermal method, and characterized by Xray diffraction (XRD), Field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The sensor fabricated from these Na2Ti3O7 nanowires shows high humidity sensitivity and rapid response-recovery. The impedance of the sensor decreases by about four orders of magnitude with increasing relative humidity (RH) from 11 to 95%. The response time of the sensor from 25 to 95% RH is about 4 s, and the corresponding recovery time is about 5 s. These results indicate the potential application of the Na2Ti3O7 nanowires for fabricating high-performance humidity sensors. (C) 2008 Elsevier B.V. All rights reserved.
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