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Material and circuit design for organic electronic vapor sensors and biosensors
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Paper Abstract

We summarize our recent results on material, device, and circuit structures for detection of volatile analytes in the atmosphere and proteins in aqueous solution. Common to both types of sensing goals is the design of materials that respond more strongly to analytes of interest than to likely interferents, and the use of chemical and electronic amplification methods to increase the ratio of the desired responses to the drift (signal/noise ratio). Printable materials, especially polymers, are emphasized. Furthermore, the use of multiple sensing elements, typically field-effect transistors, increases the selectivity of the information, either by narrowing the classes of compounds providing the responses, distinguishing time-dependent from dose-dependent responses, and increasing the ratio of analyte responses to environmental drifts. To increase the stability of systems used to detect analytes in solution, we sometimes separate the sensing surface from the output device in an arrangement known as a remote gate. We show that the output device may be an organic-based or a silicon-based transistor, and can respond to electrochemical potential changes at the sensing surface arising from a variety of chemical interactions.

Paper Details

Date Published: 30 August 2019
PDF: 8 pages
Proc. SPIE 11096, Organic and Hybrid Sensors and Bioelectronics XII, 110960A (30 August 2019); doi: 10.1117/12.2530058
Show Author Affiliations
Jennifer Dailey, Johns Hopkins Univ. (United States)
Hui Li, Johns Hopkins Univ. (United States)
Jian Song, Johns Hopkins Univ. (United States)
Kalpana Besar, Johns Hopkins Univ. (United States)
Hyun-June Jang, Johns Hopkins Univ. (United States)
Yingli Chu, Johns Hopkins Univ. (United States)
Howard E. Katz, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 11096:
Organic and Hybrid Sensors and Bioelectronics XII
Ioannis Kymissis; Emil J. W. List-Kratochvil; Ruth Shinar, Editor(s)

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