Development of novel humidity sensor based on a polymer silver nanoparticle composite

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Humidity sensing is of particular concern for many industrial applications. Humidity sensors have typically been based on a reversible interaction between a polymer and water vapour. There is work published on gas sensors based on polymer gold nanoparticle composites, where the conductivity of the composite decreases on interaction with the gas. This happens because the swelling of the polymer which increases the electron hopping distance between the gold nanoparticles. The device in this work is a polyvinyl alcohol (PVA) silver nanoparticle composite cast on an interdigital electrode array. On application of a dc bias, a current develops which is proportional to levels of humidity from 10% to 60%. The response is reversible and fast at room temperature. Details are provided of the synthesis, characterisation and use of the composite for humidity sensing. In addition the device forms the basis of a sensor for an array of gases.

Original languageEnglish
Title of host publicationECS Transactions - 35 Years of Chemical Sensors - An Honorary Symposium for Professor Jiri Janata's 70th Birthday Celebration
PublisherElectrochemical Society Inc.
Pages181-190
Number of pages10
Edition6
ISBN (Electronic)9781607680642
ISBN (Print)9781566777148
DOIs
Publication statusPublished - 2009
Event35 Years of Chemical Sensors - An Honorary Symposium for Professor Jiri Janata's 70th Birthday Celebration - 215th ECS Meeting - San Francisco, CA, United States
Duration: 24 May 200929 May 2009

Publication series

NameECS Transactions
Number6
Volume19
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference35 Years of Chemical Sensors - An Honorary Symposium for Professor Jiri Janata's 70th Birthday Celebration - 215th ECS Meeting
Country/TerritoryUnited States
CitySan Francisco, CA
Period24/05/0929/05/09

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