Date of Graduation

Summer 2014

Degree

Master of Science in Materials Science

Department

Physics, Astronomy, and Materials Science

Committee Chair

Kartik Ghosh

Abstract

Two dimensional materials such as MoS2 and graphene have become increasingly popular due to numerous advantages over conventional 3D materials. One issue holding back these 2D materials is the difficulty in creating thin films. In an attempt to solve this issue, this thesis explores a number of potential solutions to the deposition of MoS2 for use in electrical applications and the creation of flexible graphene films for use in gas barrier applications. MoS2 films over SiO2 were deposited using PLD(Pulsed Laser Deposition) while the graphene films were created using a modified rod coating technique over flexible polymer substrates. These films were then characterized using Raman, SEM, XRD, TGA, XPS, TLM(Transmission Line Measurement), and permeation testing. In the case of MoS2, I was able to successfully synthesize large area films as well as find a better contact metal(Al) for MoS2 using TLM. For the case of graphene, I selected the optimal starting material and improved the coating quality of graphene over polyurethane membranes.

Keywords

graphene, 2D materials, molybdenum disulfide, electrical properties, transmission line measurement

Subject Categories

Materials Science and Engineering

Copyright

© Garrett Lynn Beaver

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