1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The Graduate University for Advanced Studies, SOKENDAIJP143 papers
- National Institutes of Natural SciencesJP76 papers
- The University of TokyoJP75 papers
- The University of OsakaJP59 papers
- Kyoto UniversityJP52 papers
- Tohoku UniversityJP46 papers
- Japan Science and Technology AgencyJP32 papers
- Nagoya UniversityJP30 papers
- Hiroshima UniversityJP27 papers
- High Energy Accelerator Research OrganizationJP26 papers
- RIKENJP26 papers
- Tokyo Institute of TechnologyJP26 papers
24 papers · 1 filter
Kinetic phase diagram for two-step nucleation in colloid-polymer mixtures
Willem Gispen, Peter G. Bolhuis, Marjolein Dijkstra
Two-step crystallization via a metastable intermediate phase is often regarded as a non-classical process that lies beyond the framework of classical nucleation theory (CNT). In th…
Unraveling the dynamic slowdown in supercooled water: The role of dynamic disorder in jump motions
Shinji Saito
When a liquid is rapidly cooled below its melting point without inducing crystallization, its dynamics slow down significantly without noticeable structural changes. Elucidating th…
Diffusion dynamics of supercooled water modeled with the cage-jump motion and hydrogen-bond rearrangement
Takuma Kikutsuji, Kang Kim, Nobuyuki Matubayasi
The slow dynamics of glass-forming liquids is generally ascribed to the cage-jump motion. In the cage-jump picture, a molecule remains in a cage formed by neighboring molecules, an…
Classification of mobile- and immobile-molecule timescales for the Stokes-Einstein and Stokes-Einstein-Debye relations in supercooled water
Takeshi Kawasaki, Kang Kim
Molecular dynamics simulations have been performed on TIP4P/2005 supercooled water to investigate the molecular diffusion and shear viscosity at various timescales and assess the S…
Crucial role of fragmented and isolated defects in persistent relaxation of deeply supercooled water
Shinji Saito, Biman Bagchi, Iwao Ohmine
Properties of water have been well elucidated for temperatures above 230 K and yet mysteries remain in the deeply supercooled region. By performing extensive molecular dynami…
Exploration of vitrification of water and Kauzmann entropy through complex specific heat: A journey through 'No Man's Land'
Shinji Saito, Biman Bagchi
Frequency dependent specific heat, introduced by Grest and Nagel, offers valuable insight into the vitrification of supercooled liquid. We calculate this quantity and other thermod…
Spurious violation of the Stokes-Einstein-Debye relation in supercooled water
Takeshi Kawasaki, Kang Kim
The theories of Brownian motion, the Debye rotational diffusion model, and hydrodynamics together provide us with the Stokes--Einstein--Debye (SED) relation between the rotational…
Anomalous dimensionality dependence of diffusion in a rugged energy landscape : How pathological is one dimension ?
Kazuhiko Seki, Kaushik Bagchi, Biman Bagchi
Rugged (or, rough) energy landscape (REL) with spatially distributed maxima and minima are often employed in applications of physics, chemistry and biology (enzyme kinetics, protei…
Frequency dependence of specific heat in supercooled liquid water and emergence of correlated dynamics
Shinji Saito, Iwao Ohmine, Biman Bagchi
Molecular origin of the well-known specific heat anomaly in supercooled liquid water is investigated here by using extensive computer simulations and theoretical analyses. A rather…
Multiple length and time scales of dynamic heterogeneities in model glass-forming liquids: A systematic analysis of multi-point and multi-time correlations
Kang Kim, Shinji Saito
We report an extensive and systematic investigation of the multi-point and multi-time correlation functions to reveal the spatio-temporal structures of dynamic heterogeneities in g…
Multi-time density correlation functions in glass-forming liquids: Probing dynamical heterogeneity and its lifetime
Kang Kim, Shinji Saito
A multi-time extension of a density correlation function is introduced to reveal temporal information about dynamical heterogeneity in glass-forming liquids. We utilize a multi-tim…
Multiple time scales hidden in heterogeneous dynamics of glass-forming liquids
Kang Kim, Shinji Saito
A multi-time probing of density fluctuations is introduced to investigate hidden time scales of heterogeneous dynamics in glass-forming liquids. Molecular dynamics simulations for…
Slow dynamics in random media: Crossover from glass to localization transition
Kang Kim, Kunimasa Miyazaki, Shinji Saito
We study slow dynamics of particles moving in a matrix of immobile obstacles using molecular dynamics simulations. The glass transition point decreases drastically as the obstacle…
Nonequilibrium mode-coupling theory for uniformly sheared systems
Song-Ho Chong, Bongsoo Kim
We develop a nonequilibrium mode-coupling theory for uniformly sheared systems starting from microscopic, thermostatted SLLOD equations of motion. Our theory aims at describing sta…
Coupling/decoupling between translational and rotational dynamics in a supercooled molecular liquid
Song-Ho Chong, Walter Kob
We use molecular dynamics computer simulations to investigate the coupling/decoupling between translational and rotational dynamics in a glass-forming liquid of dumbbells. This is…
Connections of activated hopping processes with the breakdown of the Stokes-Einstein relation and with aspects of dynamical heterogeneities
Song-Ho Chong
We develop a new extended version of the mode-coupling theory (MCT) for glass transition, which incorporates activated hopping processes via the dynamical theory originally formula…
Structural and conformational dynamics of supercooled polymer melts: Insights from first-principles theory and simulations
Song-Ho Chong, Martin Aichele, Hendrik Meyer +2
We report on quantitative comparisons between simulation results of a bead-spring model and mode-coupling theory calculations for the structural and conformational dynamics of a su…
Optical Properties of Pentacene and Perfluoropentacene Thin Films
Alexander Hinderhofer, Ute Heinemeyer, Alexander Gerlach +5
The optical properties of pentacene (PEN) and perfluoropentacene(PFP) thin films on various SiO2 substrates were studied using variable angle spectroscopic ellipsometry. Structural…
Role of structural relaxations and vibrational excitations in the high-frequency dynamics of liquids and glasses
Song-Ho Chong
We present theoretical investigation on the high-frequency collective dynamics in liquids and glasses at microscopic length scales and terahertz frequency region based on the mode-…
On the role of hydrodynamic interactions in colloidal gelation
R. Yamamoto, K. Kim, Y. Nakayama +2
In this letter, we investigate several aspects related to the effect of hydrodynamics interactions on phase separation-induced gelation of colloidal particles. We explain physicall…
Simulating (electro)hydrodynamic effects in colloidal dispersions: smoothed profile method
Yasuya Nakayama, Kang Kim, Ryoichi Yamamoto
Previously, we have proposed a direct simulation scheme for colloidal dispersions in a Newtonian solvent [Phys.Rev.E 71,036707 (2005)]. An improved formulation called the ``Smoothe…
Dynamics in a supercooled liquid of symmetric dumbbells: Reorientational hopping for small molecular elongations
Angel J. Moreno, Song-Ho Chong, Walter Kob +1
We present extensive molecular dynamics simulations of a liquid of symmetric dumbbells, for constant packing fraction, as a function of temperature and molecular elongation. For la…
Evidence for the weak steric hindrance scenario in the supercooled-state reorientational dynamics
S. -H. Chong, A. J. Moreno, F. Sciortino +1
We use molecular-dynamics computer simulations to study the translational and reorientational dynamics of a glass-forming liquid of dumbbells. For sufficiently elongated molecules…
Polyhedral vesicles
Hiroshi Noguchi
Polyhedral vesicles with a large bending modulus of the membrane such as the gel phase lipid membrane were studied using a Brownian dynamics simulation. The vesicles exhibit variou…