2019 Fall Graduate Colloquium Series: Syed Mahedi Hasan/Katrina Vermillion

DateOctober 4, 2019Time3:35 - 5:00 pm
LocationBaylor Sciences Building, Room E.125
2019 Fall Graduate Colloquium Series

Syed Mahedi Hasan
First-ever Synthesis of Cyclocarbon: A Potential Precursor to the Molecular Semiconductors

Cyclocarbon, one of the several allotropes of pure carbon that have been found in the laboratories from long since, typically in gaseous state which quickly faded away due to its high reactivity. It is a molecular ring made only of carbon atoms linked by covalent bonding. For around 50 years, there were much debate about the bonding of carbon atoms within the ring. But there were no ways to confirm that because no one could ever trapped a cyclocarbon in stable state to investigate its bonding. This presentation will discuss the first ever synthesized cyclocarbon in a solid form along with its different features and their potential applications in semiconducting devices.

DOI: 10.1126/science.aay1914

Katrina Vermillion

Examining Gas Transport through Nanoscale Channels

Gas flow through nanoscale pores is generally described by diffuse reflection off the confining walls due to random-angle scattering. However, quantum effects are shown to contribute to determining whether the scattering is specular or diffuse, with the type of reflection depending upon the relative size of the atomic corrugations in the channel surfaces and the size of atoms being transported in the gas. Situations where gas flow may be described by specular reflection give rise to frictionless gas flow and ballistic transport, which could be important to consider in systems using carbon nanotubes, nanoporous films, graphene oxide, and other two-dimensional materials. Ballistic molecular transport through two-dimensional channels. Nature, 558(7710), 420–424. https://doi.org/10.1038/s41586-018-0203-2

For more information contact: Dr. Kenneth Park 254-710-2282
PublisherDepartment of Physics
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