Nanoscale chemical sensors based on conjugated polymer transistors

Liang Wang; Daniel Fine; Taeho Jung; Ananth Dodabalapur

doi:10.1117/12.563881

Nanoscale chemical sensors based on conjugated polymer transistors

Liang Wang, Daniel Fine, Taeho Jung, Ananth Dodabalapur

Electronic Engineering Program

University of Texas at Austin

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

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 analytesemiconductor 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.

Original language	English
Article number	24
Pages (from-to)	81-88
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5522
DOIs	https://doi.org/10.1117/12.563881
State	Published - 2004
Event	Organic Field-Effect Transistors III - Denver, CO, United States Duration: 3 Aug 2004 → 5 Aug 2004

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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 analytesemiconductor 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.",

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AU - Fine, Daniel

AU - Jung, Taeho

AU - Dodabalapur, Ananth

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AB - 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 analytesemiconductor 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.

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Y2 - 3 August 2004 through 5 August 2004

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Nanoscale chemical sensors based on conjugated polymer transistors

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