Publication Date


Document Type


Committee Members

Yan Zhuang, Ph.D. (Advisor); Fred Garber, Ph.D. (Committee Member); Hong Huang, Ph.D. (Committee Member); Saiyu Ren, Ph.D. (Committee Member); Shin Mou, Ph.D. (Committee Member)

Degree Name

Doctor of Philosophy (PhD)


Toxic chemicals have been used as chemical warfare agents since ancient times, but World War 1 saw the beginning of modern chemical proliferation. There are many methods of detecting these agents, but the combination of high sensitivity, specificity, fast response, and small form factor is difficult to achieve. More recently, graphene has been identified as a possible sensing material for ammonia and other substances. This research documents a novel method of using graphene as a chemical sensor, utilizing a radio-frequency approach to sensing. This approach utilizes all available information from the material, such as permittivity and conductivity, instead of simply examining impedance. The development of the sensor is described in depth, as well as the theoretical models used to describe its function. Finally, the overall sensitivity to ammonia, DMMP, Sarin, and VX are examined experimentally.

Page Count


Department or Program

Department of Electrical Engineering

Year Degree Awarded