Dielectric Sensing of Toxic and Explosive Chemicals via Impedance Spectroscopy and Plasmonic Resonance (research area 11: STIR)
Abstract
The objective of this effort is to study the dielectric responses of nanostructured materials upon exposure to analytes and understand the chemical mechanisms related to the resistance and plasmonic resonance shifts as a function of analyte exposure. A variety of materials with high dielectric sensitivity and chemical specificity will be identified and optimized. These include Ln-doped metal oxide nanoparticles, core-shell nanostructures, metal oxide powders, and metal-organic frameworks. Changes in structural and electronic properties upon exposure exposure to chemical analytes (nitrates, CWA simulants) will be characterized by PXRD, SEM, TEM, N2 isotherm, XPS, ATR-FTIR, and UV/Vis. Dielectric responses and plasmonic resonance shifts upon exposure to chemical analytes will be measured using alternating current (AC) impedance spectroscopy and Fourier Transform spectroscopy, respectively. Promising materials will be integrated into interdigitated capacitance and capacitor protodevices and in-situ exposure testing will be conducted at ECBC.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 18, 2017
- Source ID
- W911NF1510104
Entities
People
- Stephanie Allen
Organizations
- Army Contracting Command
- United States Army
- University of California, Santa Barbara