DEPT OF PHYSICS
DISSERTATION DEFENSE
Ph.D. Candidate: Xinran Wang
Research Advisor: Prof. Hongjie Dai
Date: Tuesday, Dec. 15th, 2009
Time: 2pm (Refreshment starts at 1:45pm)
Location: CIS-X Auditorium (CISX-101)
Title: Graphene Nanoribbons: Synthesis, Properties and Electronics
Abstract:
Graphene, a two-dimensional single atomic layer of graphite, has emerged as a material with interesting physical and chemical properties and high potential for various applications such as sensors, transparent electrodes and electronics. Due to giant carrier mobility, graphene has gained much interest as a possible candidate for future molecular electronics. Bulk graphene is a semi-metal with zero bandgap, not suitable for high on/off ratio transistors. However, narrow (~ a few nanometer) graphene nanoribbons (GNRs) have been theoretically predicted to be semiconductors that afford high performance room temperature field-effect transistors.
In this presentation, I will talk about the synthesis, physical and chemical properties and electronic devices of GNRs down to a few nanometers wide. I will address several critical issues towards graphene electronics, including the fabrication and assessment of complementary GNR transistors and large scale patterning of narrow GNRs.
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