Disruptive chemical approach to modify perovskites for chemical and biological sensors

Meghan Brandt; Mahack Kazmi; Ching Hua Su; Narasimha Prasad; Bradley Arnold; Fow-Sen Choa; Brian Cullum; Eric Bowman; Krishna S Machuga; N. B. Singh

doi:10.1117/12.2661233

14 June 2023 Disruptive chemical approach to modify perovskites for chemical and biological sensors

Meghan Brandt, Mahack Kazmi, Ching Hua Su, Narasimha Prasad, Bradley Arnold, Fow-Sen Choa, Brian Cullum, Eric Bowman, Krishna S Machuga, N. B. Singh

Author Affiliations +

Proceedings Volume 12548, Smart Biomedical and Physiological Sensor Technology XX; 1254804 (2023) https://doi.org/10.1117/12.2661233
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

We have been investigating CaCu₃Ti₄O₁₂ class of perovskites for variety of applications due to its very large dielectric constant. Several mechanisms have been proposed for the existence of the high dielectric constant based on grain boundaries and oxygen deficiencies. We will report the results of the effects of monovalent substitution to replace calcium. This will alter the size to distort the perovskite structure. In addition, we used this system as a sensor for organic agents. There were very large changes in dielectric constant and resistivity indicating this system as a very good sensor material.

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Meghan Brandt, Mahack Kazmi, Ching Hua Su, Narasimha Prasad, Bradley Arnold, Fow-Sen Choa, Brian Cullum, Eric Bowman, Krishna S Machuga, and N. B. Singh "Disruptive chemical approach to modify perovskites for chemical and biological sensors", Proc. SPIE 12548, Smart Biomedical and Physiological Sensor Technology XX, 1254804 (14 June 2023); https://doi.org/10.1117/12.2661233

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