Semiconductor Device-Based Sensors for Gas, Chemical, and Biomedical Applications

Recent Advances in Wide-Bandgap Semiconductor Biological and Gas Sensors 53

© 2011 by Taylor & Francis Group, LLC

additional options for detection of biotoxins and biological molecules of interest by use of different

protein or antibody layers. The advantage of the biofet approach is that large arrays of HEMTs can

be produced on a single chip and functionalized with different layers to allow for the detection of a

broad range of chemicals or gases.

2.4  pH MEASUREMENT

The measurement of pH is needed in many different applications, including medicine, biology,

chemistry, food science, environmental science, and oceanography. Solutions wi ...