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Bobby G. Sumpter
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Journal Articles

Scattering-based structural inversion of soft materials via Kolmogorov–Arnold networks

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Chi-Huan Tung, Lijie Ding, Ming-Ching Chang, Guan-Rong Huang, Lionel Porcar, Yangyang Wang, Jan-Michael Y. Carrillo, Bobby G. Sumpter, Yuya Shinohara, Changwoo Do, Wei-Ren Chen
Journal: The Journal of Chemical Physics
J. Chem. Phys. 162, 074106 (2025)
https://doi.org/10.1063/5.0253877
Published: February 2025
View articletitled, Scattering-based structural inversion of soft materials via Kolmogorov–Arnold networks
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Journal Articles

A discretized representation for Monte Carlo simulation of deformed semiflexible chains

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Chi-Huan Tung, Lijie Ding, Guan-Rong Huang, Yangyang Wang, Jan-Michael Y. Carrillo, Bobby G. Sumpter, Yuya Shinohara, Changwoo Do, Wei-Ren Chen
Journal: The Journal of Chemical Physics
J. Chem. Phys. 161, 224107 (2024)
https://doi.org/10.1063/5.0235798
Published: December 2024
View articletitled, A discretized representation for Monte Carlo simulation of deformed semiflexible chains
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Journal Articles

Viscoelastic relaxation and topological fluctuations in glass-forming liquids

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Chi-Huan Tung, Shou-Yi Chang, Sidney Yip, Yangyang Wang, Jan-Michael Y. Carrillo, Bobby G. Sumpter, Yuya Shinohara, Changwoo Do, Wei-Ren Chen
Journal: The Journal of Chemical Physics
J. Chem. Phys. 160, 094506 (2024)
https://doi.org/10.1063/5.0189938
Published: March 2024
View articletitled, Viscoelastic relaxation and topological fluctuations in glass-forming liquids
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Journal Articles

Digital twins and deep learning segmentation of defects in monolayer MX2 phases

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Addis S. Fuhr, Panchapakesan Ganesh, Rama K. Vasudevan, Kevin M. Roccapriore, Bobby G. Sumpter
Journal: Applied Physics Letters
Appl. Phys. Lett. 124, 031901 (2024)
https://doi.org/10.1063/5.0181080
Published: January 2024
View articletitled, Digital twins and deep learning segmentation of defects in monolayer MX2 phases
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Includes: Supplementary data
Journal Articles

Nanoscale imaging of He-ion irradiation effects on amorphous TaO x toward electroforming-free neuromorphic functions

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Olha Popova, Steven J. Randolph, Sabine M. Neumayer, Liangbo Liang, Benjamin Lawrie, Olga S. Ovchinnikova, Robert J. Bondi, Matthew J. Marinella, Bobby G. Sumpter, Petro Maksymovych
Journal: Applied Physics Letters
Appl. Phys. Lett. 123, 153503 (2023)
https://doi.org/10.1063/5.0158380
Published: October 2023
View articletitled, Nanoscale imaging of He-ion irradiation effects on amorphous TaO x toward electroforming-free neuromorphic functions
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Journal Articles

Mesoscopic two-point collective dynamics of glass-forming liquids

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Zhiqiang Shen, Jan-Michael Y. Carrillo, Bobby G. Sumpter, Yangyang Wang
Journal: The Journal of Chemical Physics
J. Chem. Phys. 159, 114501 (2023)
https://doi.org/10.1063/5.0161866
Published: September 2023
View articletitled, Mesoscopic two-point collective dynamics of glass-forming liquids
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Journal Articles

Can a deep-learning model make fast predictions of vacancy formation in diverse materials?

Open Access
Kamal Choudhary, Bobby G. Sumpter
Journal: AIP Advances
AIP Advances 13, 095109 (2023)
https://doi.org/10.1063/5.0135382
Published: September 2023
View articletitled, Can a deep-learning model make fast predictions of vacancy formation in diverse materials?
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Journal Articles

Unsupervised machine learning discovery of structural units and transformation pathways from imaging data

Open Access
Sergei V. Kalinin, Ondrej Dyck, Ayana Ghosh, Yongtao Liu, Bobby G. Sumpter, Maxim Ziatdinov
Journal: APL Machine Learning
APL Mach. Learn. 1, 026117 (2023)
https://doi.org/10.1063/5.0147316
Published: June 2023
View articletitled, Unsupervised machine learning discovery of structural units and transformation pathways from imaging data
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Journal Articles

Small angle scattering of diblock copolymers profiled by machine learning

Open Access
Chi-Huan Tung, Shou-Yi Chang, Hsin-Lung Chen, Yangyang Wang, Kunlun Hong, Jan Michael Carrillo, Bobby G. Sumpter, Yuya Shinohara, Changwoo Do, Wei-Ren Chen
Journal: The Journal of Chemical Physics
J. Chem. Phys. 156, 131101 (2022)
https://doi.org/10.1063/5.0086311
Published: April 2022
View articletitled, Small angle scattering of diblock copolymers profiled by machine learning
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Journal Articles

In situ multimodal imaging for nanoscale visualization of tribofilm formation

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Alison A. Pawlicki, Dinesh G. Bansal, Nikolay Borodinov, Alex Belianinov, Kerry Cogen, Dean Clarke, Bobby G. Sumpter, Olga S. Ovchinnikova
Journal: Journal of Applied Physics
J. Appl. Phys. 127, 154303 (2020)
https://doi.org/10.1063/1.5140480
Published: April 2020
View articletitled, In situ multimodal imaging for nanoscale visualization of tribofilm formation
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Includes: Supplementary data
Journal Articles

Understanding the effects of dipolar interactions on the thermodynamics of diblock copolymer melts

Editor’s PickAvailable to Purchase
Rajeev Kumar, Wei Li, Bobby G. Sumpter, Murugappan Muthukumar
Journal: The Journal of Chemical Physics
J. Chem. Phys. 151, 054902 (2019)
https://doi.org/10.1063/1.5114799
Published: August 2019
View articletitled, Understanding the effects of dipolar interactions on the thermodynamics of diblock copolymer melts
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Includes: Supplementary data
Journal Articles

Enhanced scattering induced by electrostatic correlations in concentrated solutions of salt-free dipolar and ionic polymers

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Rajeev Kumar, Bradley Lokitz, Timothy E. Long, Bobby G. Sumpter
Journal: The Journal of Chemical Physics
J. Chem. Phys. 149, 163336 (2018)
https://doi.org/10.1063/1.5044637
Published: October 2018
View articletitled, Enhanced scattering induced by electrostatic correlations in concentrated solutions of salt-free dipolar and ionic polymers
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Includes: Supplementary data
Journal Articles

Understanding the effects of symmetric salt on the structure of a planar dipolar polymer brush

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Jyoti P. Mahalik, Bobby G. Sumpter, Rajeev Kumar
Journal: The Journal of Chemical Physics
J. Chem. Phys. 149, 163334 (2018)
https://doi.org/10.1063/1.5037077
Published: August 2018
View articletitled, Understanding the effects of symmetric salt on the structure of a planar dipolar polymer brush
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Journal Articles

Ionic liquids-mediated interactions between nanorods

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Zhou Yu, Fei Zhang, Jingsong Huang, Bobby G. Sumpter, Rui Qiao
Journal: The Journal of Chemical Physics
J. Chem. Phys. 147, 134704 (2017)
https://doi.org/10.1063/1.5005541
Published: October 2017
View articletitled, Ionic liquids-mediated interactions between nanorods
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Includes: Supplementary data
Journal Articles

Focus: Structure and dynamics of the interfacial layer in polymer nanocomposites with attractive interactions

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Shiwang Cheng, Bobby Carroll, Vera Bocharova, Jan-Michael Carrillo, Bobby G. Sumpter, Alexei P. Sokolov
Journal: The Journal of Chemical Physics
J. Chem. Phys. 146, 203201 (2017)
https://doi.org/10.1063/1.4978504
Published: March 2017
View articletitled, Focus: Structure and dynamics of the interfacial layer in polymer nanocomposites with attractive interactions
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Journal Articles

A Rayleighian approach for modeling kinetics of ionic transport in polymeric media

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Rajeev Kumar, Jyoti P. Mahalik, Vera Bocharova, Eric W. Stacy, Catalin Gainaru, Tomonori Saito, Mallory P. Gobet, Steve Greenbaum, Bobby G. Sumpter, Alexei P. Sokolov
Journal: The Journal of Chemical Physics
J. Chem. Phys. 146, 064902 (2017)
https://doi.org/10.1063/1.4975309
Published: February 2017
View articletitled, A Rayleighian approach for modeling kinetics of ionic transport in polymeric media
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Includes: Supplementary data
Journal Articles

Revealing spatially heterogeneous relaxation in a model nanocomposite

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Shiwang Cheng, Stephen Mirigian, Jan-Michael Y. Carrillo, Vera Bocharova, Bobby G. Sumpter, Kenneth S. Schweizer, Alexei P. Sokolov
Journal: The Journal of Chemical Physics
J. Chem. Phys. 143, 194704 (2015)
https://doi.org/10.1063/1.4935595
Published: November 2015
View articletitled, Revealing spatially heterogeneous relaxation in a model nanocomposite
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Journal Articles

Tuning interfacial thermal conductance of graphene embedded in soft materials by vacancy defects

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Ying Liu, Chongze Hu, Jingsong Huang, Bobby G. Sumpter, Rui Qiao
Journal: The Journal of Chemical Physics
J. Chem. Phys. 142, 244703 (2015)
https://doi.org/10.1063/1.4922775
Published: June 2015
View articletitled, Tuning interfacial thermal conductance of graphene embedded in soft materials by vacancy defects
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Includes: Supplementary data
Journal Articles

Self-assembly and structural relaxation in a model ionomer melt

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Monojoy Goswami, Jose M. Borreguero, Bobby G. Sumpter
Journal: The Journal of Chemical Physics
J. Chem. Phys. 142, 084903 (2015)
https://doi.org/10.1063/1.4913517
Published: February 2015
View articletitled, Self-assembly and structural relaxation in a model ionomer melt
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Journal Articles

Structure and dynamics of confined flexible and unentangled polymer melts in highly adsorbing cylindrical pores

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Jan-Michael Y. Carrillo, Bobby G. Sumpter
Journal: The Journal of Chemical Physics
J. Chem. Phys. 141, 074904 (2014)
https://doi.org/10.1063/1.4893055
Published: August 2014
View articletitled, Structure and dynamics of confined flexible and unentangled polymer melts in highly adsorbing cylindrical pores
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Includes: Supplementary data