Nanoscale chemical sensor based on organic thin-film transistors

Wang, Liang; Fine, Daniel; Dodabalapur, Ananth
December 2004
Applied Physics Letters;12/27/2004, Vol. 85 Issue 26, p6386
Academic Journal
Nanoscale organic thin-film transistors were fabricated to investigate their chemical sensing properties. The use of a four-terminal geometry ensures that the sensor active area is truly nanoscale, and eliminates undesirable spreading currents. The sensor response was markedly different in nanoscale sensors compared to large-area sensors for the same analyte–semiconductor combination. The chemical sensing mechanisms in both microscale and nanoscale transistors are briefly discussed.


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