The sensors are fabricated by evaporation of a thin film of platinum onto an oxidized silicon wafer. The sensor comprises an ultra-thin metal film which allows for the immobilization of the biological material in a thin layer adjacent to the metal islands. Hz to 1 MHz. When the enzyme glucose oxidase is coated on the surface the impedance is sensitive to the glucose level in solution. The impedance decreased and the phase increased in response to glucose solutions in the range 5 to 100 mM. The response time of the sensor was less than 15 seconds.
Sensors can be a vital link in obtaining the information required.
Recent developments in sensor technology have resulted in a variety of microsensors, manufactured using the sophisticated and economical techniques of microfabrication. Microfabricated sensors have electrical outputs that can be interfaced directly or via telemetry with computers and provide information for process development and characterization, for statistical process control, or to monitor every part. At the MAL, we have developed embedded sensors for monitoring the cure of polymeric materials, strains, and delaminations. The choice of the particular sensor system to develop would be determined by industrial need and the compatibility with the manufacturing process.