A Low-cost Approach to Low-power Gas Sensors Based on Self-Heating Effects in Large Arrays of Nanostructures. (2015)

• Record Type: Journal Article
• Authors: Monereo, O.; Casals, O.; Prades, J.D.; Cirera, A.
• Is Part Of: Procedia engineering. Volume 120(2015)
• Page Start: 787
• Page End: 790
• Publication Date: 2015
• Subjects: self-heating -- self-heating calibration -- conductometric gas sensor -- carbon nanofibers -- humidity -- NH3 -- NO2.; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.08.823
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: The usual operation of a conductometric sensor device requires of an external energy source (i.e. an embedded heater). In the last years, the Joule effect in the sensing material, the so called self-heating effect, offered and alternative method to provide this energy: the probing current (or voltage) applied to measure the sensor signal also serves to heat up the sensor active film. Here, evidences of self-heating effects occurring on large arrays of nanostructures fabricated with low-cost methods are provided. The methodology is proven to be suitable to sense gases (humidity, NH3 and NO2) with low-powered heater-free devices.