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Alexei Sokolov

Alexei P. Sokolov

Professor, ORNL Governors Chair


Dynamics of disordered materials (including low-energy excitation spectra, low-temperature properties, implications for other properties, etc.);

Glass transition; Raman, Brillouin and neutron scattering spectroscopies of disordered materials (including glasses, polymers, liquids and disordered crystals);

Dynamics and functions of biological macromolecules; Photonics and nano-optics, scanning nano-Raman spectroscopy.


M.S. in Physics, Novosibirsk State University, Russia (1981)
PhD in Physics, Academy of Sciences of USSR (1986)


C I. Poppov, A. Greenbaum, A.P. Sokolov, Y. Feldman, The puzzling first-order phase transition in water-glycerol mixtures, PCCP 17, 18063-18071 (2015).

J.M.Y. Carrillo, S. Cheng, R. Kumar, M. Goswami, A. P. Sokolov. B. Sumpter, Untangling the Effects of Chain Rigidity on the Structure and Dynamics of Strongly Adsorbed Polymer Melts, Macromolecules 48, 4207-4219 (2015).

S. Khodadadi, A.P. Sokolov, Protein dynamics: from rattling in a cage to structural relaxation, Soft Matter 11 4984-4998 (2015). Invited review.

V. Bocharova, D. Sharp, A. Jones, S. Cheng, P. J. Griffin, A. L. Agapov, D. Voylov, Y. Wang, A. Kilsiuk, A. Melman, A. P. Sokolov, Enzyme Formation of Monodisperse Hydrogel Nanoparticles Tunable in Size, Chemistry of Materials 27, 2557-2565 (2015).

Rebecca L. Agapov, Jacob D. Scherger, Alexei P. Sokolov, Mark D. Foster, Identification of individual isotopes in a polymer blend using tip enhanced Raman spectroscopy, J. Raman Spectr. 46, 447-450 (2015).

Philip J. Griffin, Adam P. Holt, Katsuhiko Tsunashima, Joshua R. Sangoro, Friedrich Kremer, and Alexei P. Sokolov, “Ion Transport and Structural Dynamics in Homologous Ammonium and Phosphonium-Based Room Temperature Ionic Liquids”, J. Chem. Phys. 142, 084501/1-7 (2015).

A. L. Agapov, A. I. Kolesnikov, V. N. Novikov, R. Richert, A. P. Sokolov, “Quantum Effects in the Dynamics of Deeply Supercooled Water”, Phys. Rev. E 91, 022312/1-10 (2015).

V. Bocharova, A.L. Agapov, A. Tselev, L. Collins, R. Kumar, S. Berdzinski, V. Strehmel, A. Kisliuk, I.I. Kravchenko, B.G. Sumpter, A.P. Sokolov, S.V. Kalinin and E. Strelcov, Controlled Nanopatterning of a Polymerized Ionic Liquid in a Strong Electric Field, Adv. Func. Materials 25, 805-811 (2015).

Y. Wang, A.P. Sokolov, Design of superionic polymer electrolytes, Curr. Opinion in Chem. Engineering 7, 113-\119 (2015).

Kumar, Rajeev; Bocharova, Vera; Strelkov, Evgheny; Tselev, Alexander; Kravchenko, Ivan; Berdzinski, Stefan; Strehmel, Veronika; Ovchinnikova, Olga; Minutolo, Joseph; Sangoro, Joshua; Agapov, Alexander; Sokolov, Alexei; Kalinin, Sergei; Sumpter, Bobby; "Ion transport and softening in a polymerized ionic liquid", Nanoscale 7, 947-955(2015).

M. Nakanishi, A.P. Sokolov, Protein Dynamics in a Broad Frequency Range: Dielectric Spectroscopy Studies, J. Non-Cryst. Solids 407, 478-485 (2015).

Y. M. Shulga, V. N. Vasilets, D. P. Kiryukhin, D. N. Voylov, A. P. Sokolov, “Polymer composites prepared by low temperature post-irradiation polymerization of C2F4 in the presence of Graphene-like material: Synthesis and characterization”, RSC Advances 5, 9865-9874 (2015).

Fan, Fei; Wang, Yangyang; Hong, Tao; Heres, Max; Saito, Tomonori; Sokolov, Alexei; Ion Conduction inPolymerized Ionic Liquids with Different Pedant Groups, Macromolecules 48, 4461-4470 (2015).

C. Gainaru, A. L. Agapov, V. Fuentes-Landete, K. Amann-Winkel, H. Nelson, K.W. Koster, A. I. Kolesnikov, V. N. Novikov, R. Richert, R. Böhmer, T. Loerting, A. P. Sokolov, Anomalously large isotope effect in the glass transition of water, PNAS 111, N49, 17402-17407 (2014).

Y. Wang, F. Fan, A.L. Agapov, T. Saito, J. Yang, X. Yu, K. Hong, J. Mays, A.P. Sokolov, Examination of the Fundamental Relation between Ionic Transport and Segmental Relaxation in Polymer Electrolytes, Polymer 55,4067-4076 (2014).

Perticaroli, Stefania; Nickels, Jonathan; Ehlers, Georg; Mamontov, Eugene; Sokolov, Alexei, Dynamics and rigidity in an intrinsically disordered protein, β-casein, J. Phys. Chem. B 118, 7317-7326 (2014).

Yangyang Wang, Fei Fan, Alexander L. Agapov, Xiang Yu, Kunlun Hong, Jimmy Mays, and Alexei P. Sokolov, Design of Superionic Polymers - New Insights from Walden Plot Analysis, Sol. St. Ionics 262, 782-784 (2014).

W.E. Tenhaeff, E. Rangasamy, Y.Y. Wang, A.P. Sokolov, J. Wolfenstine, J. Sakamoto, N.J. Dudney, Resolving thegrain boundary and lattice impedance of hot pressed Li7La3Zr2O12 garnet electrolytes, ChemElectroChem 1, 375-378 (2014).

S. Perticaroli, J. D. Nickels, G. Ehlers, A. P. Sokolov, Rigidity, Secondary Structure, and the Universality of the Boson Peak in Proteins, Biophys. J. 106, 2667-2674 (2014).

J. R. Sangoro, C. Iacob, A.L. Agapov, Y. Wang, S. Berdzinski, H. Rexhausen, V. Strehmel, C. Friedrich, A.P. Sokolov, F. Kremer, "Decoupling of Ionic Conductivity from Structural Dynamics in Polymerized Ionic Liquids", Soft Matter 10, 3536-3540 (2014).

ZanetaWojnarowska, Yangyang Wang, Krzysztof J. Paluch, Alexei P. Sokolov, Marian Paluch, Observation of Highly Decoupled Conductivity in Protic Ionic Conductors, PCCP 16, 9123-9127 (2014).

Vikram K. Shrivastava, Ronald A. Quinlan, Alexander L. Agapov, John R. Dunlap, Kimberly M. Nelson, Edward Duranty, Alexei P. Sokolov, Gajanan S. Bhat, and Jimmy W. Mays. Macroscopic Properties of Restacked, Redox-Liquid Exfoliated Graphite and Graphite Mimics Produced in Bulk Quantities, Adv. Functional Mat. 24, 4969-4977 (2014).

Y. Wang, P. Griffin, A. Holt, F. Fan, and A. P. Sokolov, Observation of the Slow, Debye-Like Relaxation in Hydrogen-Bonded Liquids by Dynamic Light Scattering, J. Chem. Phys. 140, 104510 (2014).

Holt, Adam; Griffin, Philip; Bocharova, Vera; Agapov, Alexander; Imel, Adam; Dadmun, Mark; Sangoro, Joshua; Sokolov, Alexei, Dynamics at the Polymer/Nanoparticle Interface in Poly(2-vinylpyridine)/Silica Nanocomposites, Macromolecules 47, 1837-1843 (2014).

Griffin, P.J.; Holt, A.P.; Wang, Y.Y.; Novikov, V.N.; Sangoro, J.R.; Kremer, F.; Sokolov, A.P. "Interplay Between Hydrophobic Aggregation and Charge Transport in the Ionic Liquid Methyltrioctylammonium Bis(trifluoromethylsulfonyl)imide". J. Phys. Chem. B 118, 783-790 (2014).

D.N. Voylov, A.L. Agapov, A.P. Sokolov, Y.M. Shulga, A.A. Arbuzov, Room temperature reduction of multilayer graphene oxide film on a copper substrate: Penetration and participation of copper phase in redox reactions.Carbon 69, 563-570 (2014)

Norris, A.L.; Nickels, J.; Sokolov, A.P.; Serpersu, E.H., Protein Dynamics Are Influenced by the Order of Ligand Binding to an Antibiotic Resistance Enzyme, Biochemistry 53, 30-38 (2014).

Y. M. Shulga, S. A. Baskakov, E. I. Knerelman, G. I. Davidova, E. R. Badamshina, N. Yu. Shulga, E. A. Skrileva, A. L. Agapov, D. N. Voylov, A. P. Sokolov, V. M. Martynenko, Carbon nanomaterial produced by microwave exfoliation of graphite oxide: New insights, RSC Advances 4, 587-592 (2014).

L. Hong, D.C. Glass, J.D. Nickels, S. Perticaroli, Z. Yi, T. Madhusudan, H. O’Neil, Q. Zhang, A.P. Sokolov, J.C. Smith, Elastic and conformational softness of a globular protein, Phys. Rev. Letters 110, 028104 (2013).

Z. Wojnarowska, Y. Wang, J. Pionteck, K. Grzybowska, A.P. Sokolov, M. Paluch, High Pressure as a Key Factorto Identify the Conductivity Mechanism in Protic Ionic Liquids, Phys. Rev. Letters 111, 225703 (2013).

F. Fan, Y. Wang, A.P. Sokolov, Ionic Transport, Micro-Phase Separation, and Polymer Relaxation in Poly(propyleneglycol) and Lithium Perchlorate Mixtures, Macromolecules 46, 9380-9389 (2013).

J. D. Nickels, V. Garcia Sakai, A.P. Sokolov, Dynamics in Protein Powders on the Nanosecond-Picosecond Time Scales Are Dominated by Localized Motions, J. Phys. Chem. B 117, 11548-11555 (2013).

P. J. Griffin, J. R. Sangoro, Y. Wang, A. P. Holt, V. N. Novikov, A.P. Sokolov, Z. Wojnarowska, M. Paluch and F.Kremer, Dynamic crossover and the Debye-Stokes-Einstein relation in liquid N,N-diethyl-3-methylbenzamide(DEET), Soft Matter 9, 10373-10380 (2013).

J. D. Nickels, S. Perticaroli, H. O'Neill, Q. Zhang, G. Ehlers, and A. P. Sokolov, "Coherent Neutron Scattering and Collective Dynamics in the Protein, GFP", Biophys. J. 105, 2182-2187 (2013).

K. Koperwas, A. Grzybowski, K. Grzybowska, Z. Wojnarowska, A.P. Sokolov, M. Paluch, Effect of Temperatureand Density Fluctuations on the Spatially Heterogeneous Dynamics of Glass-forming Van der Waals Liquids underHigh Pressure, Phys. Rev. Lett. 111, 125701/1-5 (2013).

S. Perticaroli, J. D. Nickels, G. Ehlers, H. O’Neil, Q. Zhang, A.P. Sokolov, Secondary structure and rigidity in model proteins, Soft Matter 9, 9548 - 9556 (2013).

Y. Wang, N. Lane, C.N. Sun, F. Fan, T. Zawodsinski, A.P. Sokolov, Ionic Conductivity and Glass Transition of Phosphoric Acids, J. Phys Chem B 117, 8003-8009 (2013).

S. Perticaroli, M. Nakanishi, E. Pashkovski, A.P. Sokolov, Dynamics of Hydration Water in Sugars and Peptides Solutions, J Phys. Chem. B 117, 7729-7736 (2013).

P. Ben Ishai, E. Mamontov, J. D. Nickels, A. P. Sokolov. Influence of Ions on Water Diffusion – A Neutron Scattering Study, J. Phys. Chem B 117, 7724-7728 (2013).

Adam P. Holt, Joshua R. Sangoro, Yangyang Wang, Alexander L. Agapov, Alexei P. Sokolov, Chain andSegmental Dynamics of Poly(2-vinylpyridine) Nanocomposites, Macromolecules 46, 4168-4173 (2013).

V.N. Novikov, K.S. Schweizer, A.P. Sokolov, Coherent Neutron Scattering and Collective Dynamics on Mesoscale, J. Chem. Phys. 138, 164508/1-6 (2013).

Victoria García Sakai, Sheila Khodadadi, Marcus T. Cicerone, Joseph E. Curtis, Alexei P Sokolov, Joon Ho Roh, Solvent effects on protein fast dynamics: implications for biopreservation, Soft Matter 9, 5336-5340 (2013).

Nan Lou, YangYang Wang, Xiaopeng Li, Haixia Li, Ping Wang, Chrys Wesdemiotis, Alexei P. Sokolov, and Huiming Xiong, Dielectric Relaxation and Rheological Behavior of Supramolecular Polymeric Liquid, Macromolecules 46, 3160-3166 (2013).

R. L. Agapov, A.P. Sokolov, M.D. Foster, “Protecting TERS probes from degradation: extending mechanical and chemical stability”, J. Ram. Spectr. 44, 710-714 (2013).

Yangyang Wang, Che-Nan Sun, Fei Fan, Joshua R. Sangoro, Marc B. Berman, Steve G. Greenbaum, Thomas A. Zawodzinski, and Alexei P. Sokolov, Examination of methods to determine free-ion diffusivity and number density from analysis of electrode polarization. Phys. Rev. E 87, 042308 (2013).

R. Kumar, M. Goswami, B.C. Sumpter, V.N. Novikov, A.P. Sokolov, Effects of backbone rigidity on the local structure and dynamics in polymer melts and glasses, Phys. Chem. Chem. Phys. 15, 4604-4609 (2013).

A.P. Sokolov, Cooperativity and Heterogeneity in Dynamics of Glass-Forming Systems, AIP Conference Proceedings 1518, 104-109 (2013).

V.N. Novikov, A.P. Sokolov, Role of Quantum Effects in the Glass Transition, Phys. Rev. Letters 110, 065701/1-5 (2013).

Y. Wang, P. Wlodarczyk, A. Sokolov, M. Paluch, Rheological Study of Mutarotation of Fructose in Anhydrous State, J.Phys.Chem. B 117, 1475-1479 (2013).

Y. Chen, Y. Xu, K. Perry, A. P. Sokolov, K. More, Y. Pang, Achieving Diameter-Selective Separation of Single- Walled Carbon Nanotubes by Using Polymer Conformation-Confined Helical Cavity, ACS Macro Letters 1, 701-705 (2012).

Z. Wojnarowska, Y. Wang, A.P. Sokolov, M. Paluch, "Rheological Studies of Tautomerization Kinetics in Supercooled Glibenclamide Drug", Phys. Rev. E 86, 067104 (2012).

E. Masiewicz, A. Grzybowski, A.P. Sokolov, M. Paluch, Temperature-Volume Entropic Model for Viscosities and Structural Relaxation Times of Glass Formers, J.Phys.Chem. Lett. 3, 2643-2648 (2012).

J. D. Nickels, H. O’Neill, L. Hong, M. Tyagi, G. Ehlers, K. Weiss, Q. Zhang, Z. Yi, E. Mamontov, J. C. Smith and A. P. Sokolov, “Dynamics of Protein and its Hydration Water: Neutron Scattering Studies on Fully Deuterated GFP”, Biophys.J. 103, 1566-1575 (2012).

N. Lou, Y. Y. Wang, H. X. Li, A. P. Sokolov, H. M. Xiong, “Glassy Dynamics of Hydrogen-bonded HeteroditopicMolecules”, Polymer 53, 4455-4460 (2012).

P. Ben Ishai, Z. Sobol, J. Nickels, A. Agapov, A.P. Sokolov, “An assessment of comparative methods for approaching electrode polarization in dielectric permittivity measurements”, Rev. Sci. Instruments 83, 083118 (2012).

P.J. Griffin, A.L. Agapov, A.P. Sokolov, Translation-rotation decoupling and non-exponentiality in room temperature ionic liquids, Phys. Rev. E 86, 021508 (2012).

M. Nakanishi, P. Griffin, E. Mamontov, and A. P. Sokolov, “No Fragile-to-Strong Crossover in LiCl-H2O Solution”, J. Chem. Phys. 136, 124512 (2012).

Agapov, Alexander; Wang, Yangyang; Kumar, Kunal; Robertson, Christopher; Sokolov, Alexei; Effect of Polar Interactions on Polymer Dynamics, Macromolecules 45, 8430-8437 (2012).

K. Koperwas, A. Grzybowski, K. Grzybowska, Z. Wojnarowska, J. Pionteck, A. Sokolov, M. Paluch, “Pressure coefficient of the glass transition temperature in the thermodynamic scaling regime”, Phys. Rev. E 86, 041502 (2012).

Hui Xie, Yutao Li, Jiantao Han, Youzhong Dong, M. Paranas Paranthaman, Long Wang, Maowen Xu, Asha Gupta, Zhonge Bi, Craig Bridges, Masahiro Nakanishi, Alexei Sokolov, and John B. Goodenough, "Li6La3SnMO12 (M=Sb, Nb, Ta), a new family of lithium garnets with high Li-ion conductivity", Journal of the Electrochemical Society 159, A1148-A1151 (2012).

Asha Gupta, Ramaswamy Murugan, M. Paranas Paranthaman, Zhonghe Bi, Craig A. Bridges, Masahiro Nakanishi, Alexei P. Sokolov, Kee Sung Han, E.W. Hagaman, Hui Xie, C. Buddie Mullins, John B. Goodenough, “Optimum Lithium-Ion Conductivity in Cubic Li7-xLa3Hf2-xTaxO12”, J. Power Sources 209, 184-188 (2012).

Jonathan D. Nickels, Joseph E. Curtis, Hugh O’Neill, Alexei P. Sokolov, Role of Methyl Groups in Dynamics and Evolution of Biomolecules, J.Biol.Phys. 38, 497-505 (2012).

Y. Wang, A. L. Agapov, F. Fan, K. Hong, X. Yu, J. Mays, and A. P. Sokolov, “Decoupling of Ionic Transport from Segmental Relaxation in Polymer Electrolytes”, Phys. Rev. Letters 108, 088303 (2012).

G. Polizos, E. Tuncer, A.L. Agapov, D. Stevens, A.P. Sokolov, M.K. Kidder, J.D. Jacobs, H. Koerner, R.A. Vaia,K.L. More, I. Sauers, Effect of polymer-nanoparticle interactions on the glass transition dynamics and the conductivity mechanism in polyurethane titanium dioxide nanocomposites, Polymer 53, 595-603 (2012).

Y. Chen, A. Malkovskiy, X.-Q. Wang, M. Lebron-Colon, A. P. Sokolov, K. Perry, K. More, and Y. Pang, Selectionof Single-Walled Carbon Nanotube with Narrow Diameter Distribution by Using PPE-PPV Copolymer, ACS Macro Letters 1, 246 (2012).

Additional Information

Lab Address: 327/316 SERF

Alexei Sokolov

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