Extramural Research
Presentation Abstract
Grantee Research Project Results
Title of Talk:
Chemoreceptive Neuron MOS (CvMOS) Transistors for Environmental Monitoring in Fluid and Gas Ambients with Field Programmability and High Reliability
Abstract of Talk:
The rising interests to detect and control the specific gas (e.x. CO2
in air) and ion (e.x. K+ in water) concentrations in occasions such as
global-warming monitoring, green-house conditioning, air-quality control
and biodynamics studies, encourage the design and fabrication of full-CMOS
integrated chemical sensors. With the extended floating-gate structure,
our chemoreceptive neuron MOS (CvMOS) transistors are able to provide
additional degrees of freedom in sensing mechanism by electron-tunneling
operations, besides the distinctive responses from the FET-based current-voltage
characteristics. We have experimentally demonstrated high sensitivity,
large dynamic range and high selectivity from the subthreshold responses
for sensing electrolytic and polar substances, and have demonstrated the
feasibility for sensor-array applications with built-in electrowetting
valves in a power-efficient manner.
The full CMOS sensor array system then contains integrated sensors, actuators, control and computation modules that are suitable for wide depolyment in an autonomous operation.