Article ID Journal Published Year Pages File Type
740523 Sensors and Actuators A: Physical 2007 5 Pages PDF
Abstract

A novel, high efficiency detector for humidity is described, in which the multiwall nanotubes grown on the silicon substrates serve as anode and ITO film glass plate as cathode are separated and insulated by a glass insulator. Application of a positive bias to the multiwall nanotubes generates high electric field sufficient to field-ionize passing gas-phase atoms especially for water vapor. By monitoring the prebreakdown current, relative humidity can be determined. The sensitivity factor (I75.8%/I12%) is about 229.4. The recovery time from 53.4 to 6.8% RH for the humidity sensor is about 10 s.

Related Topics
Physical Sciences and Engineering Chemistry Electrochemistry
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