Description
Metamaterials have been held as crucial components in biomedical applications for their ability to produce customized or enhanced properties. Graphene and glassy carbon alone have many different applications and uses including electrochemical sensing and stimulation. The combination of these materials could provide a useful platform for researchers to enhance existing biosensing technologies. The purpose of this research is to investigate a novel metamaterial comprised of glassy carbon and graphene by testing a field effect transistor (FET) device along with other associated micro-structures. This is demonstrated through the fabrication of a graphene and glassy carbon metamaterial and measuring the increase in carrier mobility along other electrical and mechanical characteristics. An FET sensing device is fabricated and characterized through finite element analysis to demonstrate the capability of this metamaterial in a practical application. Through the analysis it was observed that the addition of graphene to a glassy carbon based FET device increased the sensitivity by a significant amount. The carrier mobility along with other characteristics are determined through experimentation along with finite element analysis simulations. Through the use of the Hall Effect, the carrier mobility of the metamaterial was found to be 3.11E-2 cm2/Vs with a carrier density of 3.01E22 cm-2. There was also a noticeable decrease in the measured resistivity of the metamaterial. These results demonstrate the proposed metamaterial as a potential platform as a sensing device for in vivo use.
