Senior Theses


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Publication Date

5-15-2019

Document Type

Thesis (Linfield Access)

Degree Name

Bachelor of Science in Physics

Department

Physics

Faculty Advisor(s)

Michael S. Crosser (Thesis Advisor)
Joelle Murray & Luis Barajas (Committee Members)

Subject Categories

Energy Systems | Engineering Physics | Materials Science and Engineering | Physics | Power and Energy

Abstract

Graphene is a single, atomic layer, hexagonal lattice with useful electrical properties. Discovered as a stable isolated sheet in the early 2000s, graphene field effect transistors (GFET) are an effective way to detect small changes in electrical activity. When an electrolytic fluid is placed on a GFET, a double layer capacitor can develop at the interface between the fluid and graphene. Surprisingly, this interface is sensitive to barometric pressure, making GFETs a viable device for measuring pressure changes. In this work we built a pressure vessel and placed GFETs inside to test the performance limits of graphene based on its environment.

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