Sensors & Electronics
Chemical Sensors
Chemical Threat Detection Sensor (424)
Problem: Need a sensitive, compact chemical sensor capable of rapidly detecting chemical threats to personnel.
Project Activity Scope (from Technical Overview Chart): Mechanisms through Sensors and Devices.
PNNL Solution:
- Developed enzyme-based electro-chemical (EC) sensor Identified enzymes that breakdown target chemicals to allow EC detection
- Prepared sensor electrodes with carbon nano-tube surface layer and attached enzymes
- Demonstrated EC detection of target organo-phosphates at concentrations of 0.1 ppb using the low cost system
Capabilities Employed to Meet Client Needs: Material science (including carbon nano-tube growth, self-assembling monolayers, etc.); chemical-enzyme interaction studies to identify specific enzymes required to breakdown target chemicals; chemistry including surface chemistry and molecular interactions required to attach enzymes to carbon nano-tubes; materials processing into specific morphologies (e.g., membranes, thin films, capillaries, etc.); materials characterization; integration into electrochemical (EC) sensing cells and sensor system; test planning, performance and analysis to evaluate integrated sensor performance.
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Contact: Yuehe Lin
