Perovskites for chemical and biological sensing
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract
Objectives:
The objectives was to utilize changes in polarizability/dielectric constant to determine sensing capability due to chemicals.
Background:
• CaCu₃Ti₄O₁₂ (CCTO) is a very good perovskite material with high dielectric constant
• Literature shows dielectric value depends on processing
method also
• We need very high dielectric constant and high resistivity
• CaCu₃Ti₄O₁₂ (CCTO).
• CCTO has shown very large dielectric constant.>100000
in MHZ range. It depends on processing parameters
• Very high dielectric constant may provide big changes due to chemicals