Chemical and biological sensing using polarity of materials

Ian Emge; Charmain Su; Rachit Sood; Bradley Arnold; Fow-Sen Choa; Lisa Kelly; K. D. Mandal; Manish K. Verma; N. B. Singh

doi:10.1117/12.2563877

24 April 2020 Chemical and biological sensing using polarity of materials

Ian Emge, Charmain Su, Rachit Sood, Bradley Arnold, Fow-Sen Choa, Lisa Kelly, K. D. Mandal, Manish K. Verma, N. B. Singh

Author Affiliations +

Proceedings Volume 11416, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXI; 1141610 (2020) https://doi.org/10.1117/12.2563877
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

Polarity is very important in developing materials with colossal dielectric. To meet the demands for the tunable devices and high dielectric parallel plate capacitors, several perovskites such as CaCu₃Ti₄O₁₂ (CCTO), La_2/3Cu₃Ti₄O₁₂ (LCTO) Pr_2/3Cu₃Ti₄ O₁₂ (PCTO) and several other materials of this class have been studied all over the world. Detailed studies showed that results vary a lot based on processing methods, such as powder vs. multi crystals and single crystals. In spite of great progress in processing, low resistivity and process driven variables in properties remain a big hurdle for its applications as a dielectric capacitor. We observed that dielectric values are significantly changed when these materials are exposed to chemicals and biological agents. We used parallel plate capacitor design for making chemical and biological sensors from CCTO member of this group. The data indicated huge difference in the dielectric and resistivity of the exposed samples.

Conference Presentation

Citation Download Citation

Ian Emge, Charmain Su, Rachit Sood, Bradley Arnold, Fow-Sen Choa, Lisa Kelly, K. D. Mandal, Manish K. Verma, and N. B. Singh "Chemical and biological sensing using polarity of materials", Proc. SPIE 11416, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXI, 1141610 (24 April 2020); https://doi.org/10.1117/12.2563877

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