Document Detail


Chemical sensing using nanostructured polythiophene transistors.
MedLine Citation:
PMID:  18954129     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We show that the chemical sensing responses of organic field-effect transistors based on nanostructured regioregular polythiophene are strongly dependent upon the gate biasing field. With different applied gate voltages, the source-drain current response can be different both in sign and magnitude for the same analyte. This implies that multiple competing sensing mechanisms exist at the same time. We propose that the sensing mechanisms for polycrystalline semiconducting polymer thin films are mainly an intragrain effect, which yields a positive response, and a grain boundary effect, which yields a negative response.
Authors:
Bo Li; David N Lambeth
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Publication Detail:
Type:  Journal Article     Date:  2008-10-28
Journal Detail:
Title:  Nano letters     Volume:  8     ISSN:  1530-6984     ISO Abbreviation:  Nano Lett.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-14     Completed Date:  2008-12-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3563-7     Citation Subset:  -    
Affiliation:
The Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA. boli@ieee.org
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