TITLE

Polycrystalline silicon ion sensitive field effect transistors

AUTHOR(S)
Yan, F.; Estrela, P.; Mo, Y.; Migliorato, P.; Maeda, H.; Inoue, S.; Shimoda, T.
PUB. DATE
January 2005
SOURCE
Applied Physics Letters;1/31/2005, Vol. 86 Issue 5, p053901
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the operation of polycrystalline silicon ion sensitive field effect transistors. These devices can be fabricated on inexpensive disposable substrates such as glass or plastics and are, therefore, promising candidates for low cost single-use intelligent multisensors. In this work we have developed an extended gate structure with a Si3N4 sensing layer. Nearly ideal pH sensitivity (54 mV/pH) and stable operation have been achieved. Temperature effects have been characterized. A penicillin sensor has been fabricated by functionalizing the sensing area with penicillinase. The sensitivity to penicillin G is about 10 mV/mM, in solutions with concentration lower than the saturation value, which is about 7 mM.
ACCESSION #
16345390

 

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