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Thursday, March 5 • 15:15 - 17:15
Poster: 'Graphyne membranes functionalization: A Fully Atomistic Molecular Dynamics Investigation,' Pedro Autreto, State University of Campinas/Rice University

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Graphyne is broad name for a carbon allotrope family of 2D structures, where acetylenic groups connect benzenoid rings, with the coexistence of sp and sp2 hybridized carbon atoms. In this work we have carried out,through fully atomistic reactive molecular dynamics simulations (ReaxFF), the dynamics and structural changes of the functionalization of graphdiyne, α, β, and γ graphyne . Our results have presented that the existence of different sites for hydrogen bonding, related to single and triple bonds, makes the process of incorporating hydrogen atoms into graphyne membranes much more complex than the graphene ones. Our results also show that functionalization reactions are strongly site dependent and that the sp-hybridized carbon atoms are the preferential sites to chemical attacks. In our cases, the effectiveness of the hydrogenation (estimated from the number of hydrogen atoms covalently bonded to carbon atoms) follows the α, β, γ-graphyne structure ordering.

Speakers

Thursday March 5, 2015 15:15 - 17:15 CST
BioScience Research Collaborative 6500 Main Street, Houston, Tx 77005