B
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.
Papers
More filters
Book ChapterDOI
Nanoscale Optical Probes of Polymer Dynamics in Ultrasmall Volumes
Michael D. Barnes,J. V. Ford,Kazuhiko Fukui,Bobby G. Sumpter,Donald W. Noid,Joshua U. Otaigbe +5 more
Journal ArticleDOI
Combatting ionic aggregation using dielectric forces—combining modeling/simulation and experimental results to explain end-capping of primary amine functionalized polystyrene
Jamie M. Messman,Deanna L. Pickel,Monojoy Goswami,David Uhrig,Bobby G. Sumpter,Jimmy W. Mays,Jimmy W. Mays +6 more
TL;DR: In this paper, a chain-end functionalization of living poly(styryl)lithium using 1-(3-bromopropyl)-2,2,5,5-tetramethyl-1-aza-2, 5-disilacyclo-pentane (BTDP) to generate primary amine end-functionalized polystyrene was investigated using high vacuum anionic polymerization techniques.
Book ChapterDOI
Evaluation of Stripping Resistance of Organoclay-Modified Asphalt Binder and Aggregate Systems Using an Optical Contact Angle Analyzer
TL;DR: In this paper, the authors evaluate the changes in moisture resistance of different nanoclays (NCs) modified asphalt binders through the surface free energy (SFE) technique, which is derived from static contact angle (SCA) data measured from an optical contact angle analyzer (OCA).
Journal ArticleDOI
Anti-polyelectrolyte and polyelectrolyte effects on conformations of polyzwitterionic chains in dilute aqueous solutions
Zening Liu,Jong K. Keum,Tianyu Li,Jihua Chen,Kunlun Hong,Yangyang Wang,Bobby G. Sumpter,Rigoberto C. Advincula,Rajeev Kumar +8 more
TL;DR: In this article , the effects of added salt [potassium bromide (KBr)] on gyration and hydrodynamic radii of poly(sulfobetaine methacrylate) in dilute aqueous solutions using dynamic light scattering and small-angle X-ray scattering, respectively.
Journal ArticleDOI
Probing static discharge of polymer surfaces with nanoscale resolution
Nikolay Borodinov,Anton V. Ievlev,Jan-Michael Y. Carrillo,Liam Collins,Andrea Calamari,Marc Andrew Mamak,Patrick John Mulcahy,Bobby G. Sumpter,Olga S. Ovchinnikova,Petro Maksymovych +9 more
TL;DR: In-situ quantification of tribological charging with nanoscale resolution is demonstrated, that is applicable to a wide range of dielectric systems and highlights the complex phenomena of electrostatic discharge upon contact formation to pre-charged surfaces, and directly reveals the mobility of surface charges.