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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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Computational experiments on the motion and generation of defects in polymer crystals
TL;DR: In this article, the authors used the molecular dynamics method to investigate the formation end motion of defects in polymer crystals and found that the activation energy for the formation of conformational defects is on the order of 16 kJ/mol.
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Pancake π–π Bonding Goes Double: Unexpected 4e/All-Sites Bonding in Boron- and Nitrogen-Doped Phenalenyls
TL;DR: It is shown that the B- or N-doped PLYs, usually considered closed-shell and therefore trifling, can be rendered open-shell singlet by proper edge substitutions, and the unusual double π-π bonding motif discovered in these PLY analogues may broaden the landscape of, and find new applications for, intermolecular covalent bonding interactions.
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Light-Ferroic Interaction in Hybrid Organic–Inorganic Perovskites
Yongtao Liu,Yongtao Liu,Anton V. Ievlev,Liam Collins,Nikolay Borodinov,Alex Belianinov,Jong K. Keum,Miaosheng Wang,Mahshid Ahmadi,Stephen Jesse,Kai Xiao,Bobby G. Sumpter,Bin Hu,Sergei V. Kalinin,Olga S. Ovchinnikova +14 more
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Structure-induced switching of interpolymer adhesion at a solid-polymer melt interface.
Naisheng Jiang,Mani Sen,Wenduo Zeng,Zhizhao Chen,Justin Cheung,Yuma Morimitsu,Maya K. Endoh,Tadanori Koga,Masafumi Fukuto,Guangcui Yuan,Sushil K. Satija,Jan-Michael Y. Carrillo,Bobby G. Sumpter +12 more
TL;DR: A link between the interfacial structure and adhesive property of homopolymer chains physically adsorbed (i.e., via physisorption) onto solids is reported, and coarse-grained molecular dynamics simulation results suggest that the tail parts of the loosely adsorbing chains act as "connector molecules", bridging the free chains and substrate surface and improving the interf racial adhesion.
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Monomer volume fraction profiles in pH responsive planar polyelectrolyte brushes
Jyoti P. Mahalik,Yubo Yang,Chaitra Deodhar,John F. Ankner,Bradley S. Lokitz,S. Michael Kilbey,Bobby G. Sumpter,Rajeev Kumar +7 more
TL;DR: In this article, the spatial dependencies of monomer volume fraction profiles of pH responsive polyelectrolyte brushes were investigated using field theories and neutron reflectivity experiments and direct comparisons between predictions of the theories and experimental measurements were presented.