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Volatile organic compound detection using nanostructured copolymers.

Authors
Li-B; Sauve-G; Iovu-MC; Jeffries-El-M; Zhang-R; Cooper-J; Santhanam-S; Schultz-L; Revelli-JC; Kusne-AG; Kowalewski-T; Snyder-JL; Weiss-LE; Fedder-GK; McCullough-RD; Lambeth-DN
Source
Nano Lett 2006 Aug; 6(8):1598-1602
NIOSHTIC No.
20030837
Abstract
Regioregular polythiophene-based conductive copolymers with highly crystalline nanostructures are shown to hold considerable promise as the active layer in volatile organic compound (VOC) chemresistor sensors. While the regioregular polythiophene polymer chain provides a charge conduction path, its chemical sensing selectivity and sensitivity can be altered either by incorporating a second polymer to form a block copolymer or by making a random copolymer of polythiophene with different alkyl side chains. The copolymers were exposed to a variety of VOC vapors, and the electrical conductivity of these copolymers increased or decreased depending upon the polymer composition and the specific analytes. Measurements were made at room temperature, and the responses were found to be fast and appeared to be completely reversible. Using various copolymers of polythiophene in a sensor array can provide much better discrimination to various analytes than existing solid state sensors. Our data strongly indicate that several sensing mechanisms are at play simultaneously, and we briefly discuss some of them.
Keywords
Organic-compounds; Polymers; Volatiles; Analytical-instruments; Analytical-processes; Sampling-equipment; Sampling-methods; Nanotechnology
Contact
Electrical and Computer Engineering Department, Chemistry Department, Robotics Institute, and Chemical Engineering Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
CODEN
NALEFD
Publication Date
20060809
Document Type
Journal Article
Fiscal Year
2006
NTIS Accession No.
NTIS Price
Issue of Publication
8
ISSN
1530-6984
NIOSH Division
NPPTL
Priority Area
Research Tools and Approaches: Control Technology and Personal Protective Equipment
Source Name
Nano Letters
State
PA
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