Band Gap Opening in Methane Intercalated Graphene Jasmine Hargrove, H

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Presentation transcript:

Band Gap Opening in Methane Intercalated Graphene Jasmine Hargrove, H Band Gap Opening in Methane Intercalated Graphene Jasmine Hargrove, H. B. M. Shashikala, X.-Q. Wang (Clark Atlanta) L. Guerrido, N. Ravi (Spelman) (DMR-Award #0934142) Recent experimental work has demonstrated production of quasi free-standing graphene by methane intercalation. The intercalation weakens the coupling of adjacent graphene layers and yields Dirac fermion behaviour of monolayer graphene. Researchers at Clark Atlanta University and Spelman College have investigated the electronic characteristics of methane intercepted graphene bilayer under a perpendicularly applied electric field. Evolution of the band structure of intercalated graphene as a function of the bias is studied by means of density-functional theory including interlayer van der Waals interactions. The findings suggest a controllable band gap opening in methane-intercalated graphene for future device applications. Figure caption: Calculated dependence of the energy gap on the applied electric bias for AB-stacked, methane-intercalated graphene. Insets: extracted charge density of valence band maximum (VBM) and conduction band minimum (CBM) at the band center, with different wave function components colored with blue and yellow, respectively. The work has been accepted for publication in Nanoscale.

Tunable Band Gap in Gold Intercalated Graphene I. Sapkota, K. Suggs, X Tunable Band Gap in Gold Intercalated Graphene I. Sapkota, K. Suggs, X.-Q. Wang (Clark Atlanta); M. Roundtree, J. Hall (Morehouse) (DMR-Award #0934142) Recent experimental work has demonstrated production of quasi free-standing graphene by gold intercalation. The intercalation weakens the coupling of adjacent graphene layers and yields Dirac fermion behavior of monolayer graphene. Researchers at Clark Atlanta University and Morehouse College have investigated the electronic characteristics of gold intercepted graphene bilayer under a perpendicularly applied electric field. Evolution of the band structure of intercalated graphene as a function of the bias is studied by means of density-functional theory including interlayer van der Waals interactions. The findings suggest a controllable band gap opening in gold intercalated graphene for future device applications. The work was published in Phys. Chem. Chem. Phys.

High Altitude Research Platform L. L. Muldrow(Morehouse) , K. Suggs, D High Altitude Research Platform L. L. Muldrow(Morehouse) , K. Suggs, D. R. Reuven (Clark Atlanta) (DMR-Award #0934142) The 2012 Pre-Freshmen Bridge Summer Science Program students conducted an interdisciplinary high altitude balloon research project. The research project involved eight teams of students working on original research projects.Two teams worked on materials science research, two teams on sustainable energy materials, and one team each on platform design, robotics, video documentary and behavior. The goal, which was accomplished, was to launch this payload of different research projects to the edge of space and collect data.Three of the teams presented their data at the NSF Emerging Researchers National undergraduate student conference.