Senior Theses
Publication Date
5-2018
Document Type
Thesis (Open Access)
Degree Name
Bachelor of Science in Physics
Department
Physics
Faculty Advisor(s)
Michael Crosser (Thesis Advisor)
Jennifer Heath & Joelle Murray (Committee Members)
Subject Categories
Energy Systems | Engineering Physics | Materials Science and Engineering | Physics | Power and Energy
Abstract
When operating graphene field effect transistors (GFETs) in fluid, a double layer capacitance (Cdl) is formed at the surface. In the literature, the Cdl is estimated using values obtained using metal electrode experiments. Due to the distinctive electronic and surface properties of graphene, there is reason to believe these estimates are inadequate. This work seeks to directly characterize the double layer capacitance of a GFET. A unique method for determining the Cdl has been implemented, and data has been obtained for three electrolytes and one ionic fluid. The results yield dramatically lower Cdl values than those obtained with metal electrode experiments and also demonstrate significant asymmetry between electron and hole doped behavior in these ambipolar devices.
Recommended Citation
Ulibarri, Agatha, "Measuring the Double Layer Capacitance of Electrolyte Solutions Using a Graphene Field Effect Transistor" (2018). Senior Theses. 40.
https://digitalcommons.linfield.edu/physstud_theses/40
Included in
Energy Systems Commons, Engineering Physics Commons, Materials Science and Engineering Commons, Power and Energy Commons
