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Proceedings Paper

Nanoscale chemical sensors based on conjugated polymer transistors
Author(s): Liang Wang; Daniel Fine; Taeho Jung; Ananth Dodabalapur
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Paper Abstract

Nanoscale thin film transistors with conjugated polymers as the active layer were fabricated to investigate their chemical sensing properties. Guarding electrodes as close as 20 nm to the two sides of the channel were employed to eliminate undesirable spreading currents and ensure that the sensor active area is truly nanoscale. The response of drain current exhibited opposite directions in nanoscale sensors compared to large scale devices, for the same analyte-semiconductor combination. The transition in response behavior was observed occurring in a certain interval of channel length. The chemical sensing mechanisms in both microscale and nanoscale transistors are briefly discussed.

Paper Details

Date Published: 18 October 2004
PDF: 8 pages
Proc. SPIE 5522, Organic Field-Effect Transistors III, (18 October 2004); doi: 10.1117/12.563881
Show Author Affiliations
Liang Wang, Univ. of Texas/Austin (United States)
Daniel Fine, Univ. of Texas/Austin (United States)
Taeho Jung, Univ. of Texas/Austin (United States)
Ananth Dodabalapur, Univ. of Texas/Austin (United States)


Published in SPIE Proceedings Vol. 5522:
Organic Field-Effect Transistors III
Ananth Dodabalapur, Editor(s)

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