Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 55: Graphene

O 55.12: Poster

Dienstag, 21. März 2017, 18:30–20:30, P2-EG

Response of the electronic structure of graphene to pressure, temperature and humidity — •Haydar Altuğ Yildirim, Umut Kamber, Cem Kincal, and Oğuzhan Gürlü — Istanbul Technical University, Istanbul, Turkey

Since its first isolation, the detection of gas molecules as well as humidity and temperature by use of graphene have been a matter of interest. We have used atmospheric pressure Chemical Vapor Deposition (AP-CVD) grown graphene and various transfer techniques to produce graphene based sensors on dielectric substrates. A controlled atmosphere chamber was designed and built to investigate the response of the resistivity of graphene to varying pressure, temperature and humidity. Comparison of the measurements taken by custom made graphene devices and a precise commercial sensor have shown similar responses. Upon changing the surface temperature of the graphene device we were able to control the adsorption of the water molecules. Effects of graphene growth parameters and transfer processes on to dielectrics, as well as ageing and temperature over humidity sensing capacity of graphene based devices will be presented.