Laser ablation direct writing of metal nanoparticles for hydrogen and humidity sensors.
Beliatis, MJ, Martin, NA, Leming, EJ, Silva, SR and Henley, SJ (2011) Laser ablation direct writing of metal nanoparticles for hydrogen and humidity sensors. Langmuir, 27 (3). 1241 - 1244. ISSN 0743-7463
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Official URL: http://dx.doi.org/10.1021/la1038574
A UV pulsed laser writing technique to fabricate metal nanoparticle patterns on low-cost substrates is demonstrated. We use this process to directly write nanoparticle gas sensors, which operate via quantum tunnelling of electrons at room temperature across the device. The advantages of this method are no lithography requirements, high precision nanoparticle placement, and room temperature processing in atmospheric conditions. Palladium-based nanoparticle sensors are tested for the detection of water vapor and hydrogen within controlled environmental chambers. The electrical conduction mechanism responsible for the very high sensitivity of the devices is discussed with regard to the interparticle capacitance and the tunnelling resistance.
|Additional Information:||This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher.To access the final edited and published work see http://dx.doi.org/10.1021/la1038574.|
|Divisions:||Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre|
|Deposited By:||Symplectic Elements|
|Deposited On:||03 May 2012 12:10|
|Last Modified:||01 Apr 2013 14:49|
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