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Bobby G. Sumpter

Researcher at Oak Ridge National Laboratory

Publications -  652
Citations -  28014

Bobby G. Sumpter is an academic researcher from Oak Ridge National Laboratory. The author has contributed to research in topics: Polymer & Graphene. The author has an hindex of 60, co-authored 619 publications receiving 23583 citations. Previous affiliations of Bobby G. Sumpter include University of Florida & Cornell University.

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Step-by-step growth of epitaxially aligned polythiophene by surface-confined reaction

TL;DR: This paper demonstrates the surface-confined growth of ordered arrays of poly(3,4-ethylenedioxythiophene) (PEDOT) chains, by using the substrate (the 110 facet of copper) simultaneously as template and catalyst for polymerization, and confirms an unexpected adsorption geometry of the PEDOT oligomers.
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Heterojunctions between metals and carbon nanotubes as ultimate nanocontacts

TL;DR: Density functional calculations show that these structures are mechanically strong, the bonding at the interface is covalent, and the electronic states at and around the Fermi level are delocalized across the entire system, essential for the application of such heterojunctions as contacts in electronic devices and for the fabrication of robust nanotube–metal composite materials.
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Directing Matter: Toward Atomic-Scale 3D Nanofabrication.

TL;DR: The gaps that currently constrain the processing range of these platforms are laid out, reflect on indirect requirements, such as the integration of large-scale data analysis with theory, and discuss future prospects of these technologies.
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Untangling the Effects of Chain Rigidity on the Structure and Dynamics of Strongly Adsorbed Polymer Melts

TL;DR: In this article, a detailed analysis of coarse-grained molecular dynamics simulations of semi-lexible polymer melts in contact with a strongly adsorbing substrate is presented, where the segments in the interfacial layer are characterized by counting the number of trains, loops, tails, and unadsorbed segments.