Nanoscale chemical sensors based on conjugated polymer transistors

Liang Wang; Daniel Fine; Taeho Jung; Ananth Dodabalapur

doi:10.1117/12.563881

18 October 2004 Nanoscale chemical sensors based on conjugated polymer transistors

Liang Wang, Daniel Fine, Taeho Jung, Ananth Dodabalapur

Proceedings Volume 5522, Organic Field-Effect Transistors III; (2004) https://doi.org/10.1117/12.563881
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Liang Wang, Daniel Fine, Taeho Jung, and Ananth Dodabalapur "Nanoscale chemical sensors based on conjugated polymer transistors", Proc. SPIE 5522, Organic Field-Effect Transistors III, (18 October 2004); https://doi.org/10.1117/12.563881

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