Kenichiro Koga

Ph.D, Professor

  • 2999 Citations
  • 24 h-Index
19942019
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Research Output 1994 2019

  • 2999 Citations
  • 24 h-Index
  • 83 Article
  • 2 Editorial
2019

Theoretical analysis on thermodynamic stability of chignolin

Sumi, T. & Koga, K., Dec 1 2019, In : Scientific reports. 9, 1, 5186.

Research output: Contribution to journalArticle

Open Access
Thermodynamic stability
Free energy
Proteins
Protein folding
Mutagenesis

Three-phase equilibria in density-functional theory: Interfacial tensions

Koga, K. & Indekeu, J. O., Apr 28 2019, In : Journal of Chemical Physics. 150, 16, 164701.

Research output: Contribution to journalArticle

Phase equilibria
Density functional theory
Surface tension
interfacial tension
density functional theory
2018

Hydrophobicity Varying with Temperature, Pressure, and Salt Concentration

Koga, K. & Yamamoto, N., Apr 5 2018, In : Journal of Physical Chemistry B. 122, 13, p. 3655-3665 11 p.

Research output: Contribution to journalArticle

Solvation
Hydrophobicity
hydrophobicity
Hydrophobic and Hydrophilic Interactions
Salts
2017
6 Citations (Scopus)

Application of reference-modified density functional theory: Temperature and pressure dependences of solvation free energy

Sumi, T., Maruyama, Y., Mitsutake, A., Mochizuki, K. & Koga, K., 2017, (Accepted/In press) In : Journal of Computational Chemistry.

Research output: Contribution to journalArticle

Solvation
Density Functional
Free energy
Density functional theory
Free Energy
1 Citation (Scopus)

Efficiency at maximum power for an isothermal chemical engine with particle exchange at varying chemical potential

Koning, J., Koga, K. & Indekeu, J. O., Feb 1 2017, In : European Physical Journal: Special Topics. 226, 3, p. 427-431 5 p.

Research output: Contribution to journalArticle

Chemical potential
engines
Engines
cycles
Temperature
2016
6 Citations (Scopus)

A reference-modified density functional theory: An application to solvation free-energy calculations for a Lennard-Jones solution

Sumi, T., Maruyama, Y., Mitsutake, A. & Koga, K., Jun 14 2016, In : Journal of Chemical Physics. 144, 22, 224104.

Research output: Contribution to journalArticle

Solvation
Free energy
Density functional theory
solvation
free energy
7 Citations (Scopus)

Cononsolvency behavior of hydrophobes in water + methanol mixtures

Mochizuki, K. & Koga, K., 2016, In : Physical Chemistry Chemical Physics. 18, 24, p. 16188-16195 8 p.

Research output: Contribution to journalArticle

Methanol
Methane
methyl alcohol
Water
Chemical potential
2 Citations (Scopus)
Phase equilibria
Surface tension
interfacial tension
Phase interfaces
illuminating
12 Citations (Scopus)

Driving forces for the pressure-induced aggregation of poly(N-isopropylacrylamide) in water

Mochizuki, K., Sumi, T. & Koga, K., 2016, In : Physical Chemistry Chemical Physics. 18, 6, p. 4697-4703 7 p.

Research output: Contribution to journalArticle

Agglomeration
Water
water
pressure dependence
Molecules
4 Citations (Scopus)

Hydrophobic polymer chain in water that undergoes a coil-to-globule transition near room temperature

Hatano, I., Mochizuki, K., Sumi, T. & Koga, K., Dec 1 2016, In : Journal of Physical Chemistry B. 120, 47, p. 12127-12134 8 p.

Research output: Contribution to journalArticle

globules
Polymers
coils
Temperature
Water
7 Citations (Scopus)
liquid phases
aqueous solutions
liquids
molecules
temperature dependence
5 Citations (Scopus)

Mean-Field Approximation to the Hydrophobic Hydration in the Liquid-Vapor Interface of Water

Abe, K., Sumi, T. & Koga, K., Mar 3 2016, In : Journal of Physical Chemistry B. 120, 8, p. 2012-2019 8 p.

Research output: Contribution to journalArticle

liquid-vapor interfaces
Hydration
hydration
Solvation
solutes
2015
8 Citations (Scopus)

Deriving Second Osmotic Virial Coefficients from Equations of State and from Experiment

Koga, K., Holten, V. & Widom, B., Sep 17 2015, In : Journal of Physical Chemistry B. 119, 42, p. 13391-13397 7 p.

Research output: Contribution to journalArticle

virial coefficients
Equations of state
solutes
equations of state
Propane
1 Citation (Scopus)

Solid-liquid critical behavior of a cylindrically confined Lennard-Jones fluid

Mochizuki, K. & Koga, K., Jul 28 2015, In : Physical Chemistry Chemical Physics. 17, 28, p. 18437-18442 6 p.

Research output: Contribution to journalArticle

Fluids
fluids
critical point
Liquids
liquids
28 Citations (Scopus)

Solid-liquid critical behavior of water in nanopores

Mochizuki, K., Koga, K. & Sastry, S., Jul 7 2015, In : Proceedings of the National Academy of Sciences of the United States of America. 112, 27, p. 8221-8226 6 p.

Research output: Contribution to journalArticle

liquids
water
ice
critical point
loci
2014
18 Citations (Scopus)

Electrostatic field-exposed water in nanotube at constant axial pressure

He, Y., Sun, G., Koga, K. & Xu, L., Oct 16 2014, In : Scientific Reports. 4, 6596.

Research output: Contribution to journalArticle

nanotubes
electric fields
water
electrostriction
prisms
2 Citations (Scopus)

Local solubility of nonpolar molecules in the liquid-vapor interfaces of water and simple liquids

Abe, K. & Koga, K., 2014, In : Journal of Molecular Liquids. 200, PA, p. 7-11 5 p.

Research output: Contribution to journalArticle

liquid-vapor interfaces
solubility
Solubility
Vapors
Molecules

Preface

Koga, K. & Akiyama, R., 2014, In : Journal of Molecular Liquids. 200, PA, p. 1 1 p.

Research output: Contribution to journalEditorial

3 Citations (Scopus)
liquid-vapor interfaces
solubility
Solubility
Vapors
temperature dependence
2013
4 Citations (Scopus)

Note on the calculation of the second osmotic virial coefficient in stable and metastable liquid states

Widom, B. & Koga, K., Jan 31 2013, In : Journal of Physical Chemistry B. 117, 4, p. 1151-1154 4 p.

Research output: Contribution to journalArticle

virial coefficients
Chemical potential
Liquids
liquids
metastable state
29 Citations (Scopus)

Osmotic second virial coefficient of methane in water

Koga, K., Oct 17 2013, In : Journal of Physical Chemistry B. 117, 41, p. 12619-12624 6 p.

Research output: Contribution to journalArticle

Methane
virial coefficients
solutes
methane
Water
3 Citations (Scopus)
Wetting Transition
Renormalization Group
wetting
Wetting
Fluctuations
16 Citations (Scopus)

Thermodynamic functions as correlation-function integrals

Koga, K. & Widom, B., Mar 21 2013, In : The Journal of Chemical Physics. 138, 11, 114504.

Research output: Contribution to journalArticle

Propane
Thermodynamics
thermodynamics
virial coefficients
propane
2012
2 Citations (Scopus)

Diffusivity of liquid argon in carbon nanotubes

Akiyoshi, H. & Koga, K., Sep 2012, In : Journal of the Physical Society of Japan. 81, SUPPL. A, SA022.

Research output: Contribution to journalArticle

diffusivity
carbon nanotubes
argon
diffusion coefficient
liquids
1 Citation (Scopus)

Inclusion of neon inside ice I c and its influence to the ice structure

Hakim, L., Matsumoto, M., Koga, K. & Tanaka, H., Sep 2012, In : Journal of the Physical Society of Japan. 81, SUPPL. A, SA018.

Research output: Contribution to journalArticle

neon
ice
inclusions
simulation
Lennard-Jones potential
1 Citation (Scopus)

Model of freezing behavior of liquid monolayers adsorbed in cylindrical pores

Abe, K. & Koga, K., Sep 2012, In : Journal of the Physical Society of Japan. 81, SUPPL. A, SA021.

Research output: Contribution to journalArticle

freezing
porosity
liquids
interactions
cells

Preface

Koga, K. & Akiyama, R., Sep 2012, In : Journal of the Physical Society of Japan. 81, SUPPL. A

Research output: Contribution to journalEditorial

2011
3 Citations (Scopus)

How much does the core structure of a three-phase contact line contribute to the line tension near a wetting transition?

Indekeu, J. O., Koga, K. & Widom, B., May 18 2011, In : Journal of Physics Condensed Matter. 23, 19, 194101.

Research output: Contribution to journalArticle

Phase Transition
Thermodynamics
wetting
Wetting
Mean field theory
6 Citations (Scopus)

Hydrophobicity in Lennard-Jones solutions

Ishizaki, M., Tanaka, H. & Koga, K., Feb 14 2011, In : Physical Chemistry Chemical Physics. 13, 6, p. 2328-2334 7 p.

Research output: Contribution to journalArticle

Solvation
Hydrophobicity
hydrophobicity
solvation
isochoric processes
14 Citations (Scopus)

Solvation of hydrophobes in water and simple liquids

Koga, K., Nov 28 2011, In : Physical Chemistry Chemical Physics. 13, 44, p. 19749-19758 10 p.

Research output: Contribution to journalArticle

Solvation
solvation
Water
Liquids
liquids
3 Citations (Scopus)

Wetting transitions of continuously varying or infinite order from a mean-field density-functional theoryy

Koga, K., Indekeu, J. O. & Widom, B., Apr 2011, In : Molecular Physics. 109, 7-10, p. 1297-1311 15 p.

Research output: Contribution to journalArticle

Anisotropy
wetting
Wetting
Magnets
Thermodynamics
2010
1 Citation (Scopus)

First- and second-order wetting transitions at liquid-vapor interfaces

Koga, K., Indekeu, J. O. & Widom, B., 2010, In : Faraday Discussions. 146, p. 217-222 6 p.

Research output: Contribution to journalArticle

liquid-vapor interfaces
wetting
Wetting
Vapors
Liquids
12 Citations (Scopus)

Infinite-order transitions in density-functional models of wetting

Koga, K., Indekeu, J. O. & Widom, B., Jan 19 2010, In : Physical Review Letters. 104, 3, 036101.

Research output: Contribution to journalArticle

wetting
loci
8 Citations (Scopus)

Novel neon-hydrate of cubic ice structure

Hakim, L., Koga, K. & Tanaka, H., May 1 2010, In : Physica A: Statistical Mechanics and its Applications. 389, 9, p. 1834-1838 5 p.

Research output: Contribution to journalArticle

neon
hydrates
ice
Chemical Potential
Voids
21 Citations (Scopus)

Phase behavior of different forms of ice filled with hydrogen molecules

Hakim, L., Koga, K. & Tanaka, H., Mar 16 2010, In : Physical Review Letters. 104, 11, 115701.

Research output: Contribution to journalArticle

ice
hydrogen
molecules
hydrates
simulation
17 Citations (Scopus)

Thermodynamic stability of hydrogen hydrates of ice Ic and II structures

Hakim, L., Koga, K. & Tanaka, H., Oct 13 2010, In : Physical Review B - Condensed Matter and Materials Physics. 82, 14, 144105.

Research output: Contribution to journalArticle

Ice
Hydrates
hydrates
Hydrogen
ice
2009
24 Citations (Scopus)

Augmented stability of hydrogen clathrate hydrates by weakly polar molecules

Nakayama, T., Koga, K. & Tanaka, H., 2009, In : The Journal of Chemical Physics. 131, 21, 214506.

Research output: Contribution to journalArticle

clathrates
Hydrates
hydrates
Hydrogen
Acetone
6 Citations (Scopus)

Phase behavior and fluid-solid surface tension of argon in slit pores and carbon nanotubes

Hamada, Y., Koga, K. & Tanaka, H., Jun 15 2009, In : Physica A: Statistical Mechanics and its Applications. 388, 12, p. 2289-2298 10 p.

Research output: Contribution to journalArticle

Nanotubes
Surface Tension
solid surfaces
slits
nanotubes
2008
31 Citations (Scopus)

A plastic phase of water from computer simulation

Takii, Y., Koga, K. & Tanaka, H., 2008, In : The Journal of Chemical Physics. 128, 20, 204501.

Research output: Contribution to journalArticle

Ice
plastics
computerized simulation
Plastics
ice
11 Citations (Scopus)

Mean-field density-functional model of a second-order wetting transition

Koga, K. & Widom, B., 2008, In : The Journal of Chemical Physics. 128, 11, 114716.

Research output: Contribution to journalArticle

wetting
Wetting
interfacial tension
191 Citations (Scopus)

Phase diagram of water in carbon nanotubes

Takaiwa, D., Hatano, I., Koga, K. & Tanaka, H., Jan 8 2008, In : Proceedings of the National Academy of Sciences of the United States of America. 105, 1, p. 39-43 5 p.

Research output: Contribution to journalArticle

Carbon Nanotubes
Ice
Freezing
Water
Nanotubes
2007
12 Citations (Scopus)

Line and boundary tensions on approach to the wetting transition

Koga, K. & Widom, B., 2007, In : The Journal of Chemical Physics. 127, 6, 064704.

Research output: Contribution to journalArticle

wetting
Wetting
Byproducts
symmetry
57 Citations (Scopus)

On the thermodynamic stability of hydrogen clathrate hydrates

Katsumasa, K., Koga, K. & Tanaka, H., 2007, In : The Journal of Chemical Physics. 127, 4, 044509.

Research output: Contribution to journalArticle

clathrates
Hydrates
hydrates
Hydrogen
Thermodynamic stability
61 Citations (Scopus)

Phase equilibria and interfacial tension of fluids confined in narrow pores

Hamada, Y., Koga, K. & Tanaka, H., 2007, In : The Journal of Chemical Physics. 127, 8, 084908.

Research output: Contribution to journalArticle

Phase equilibria
Surface tension
interfacial tension
porosity
Pore size
16 Citations (Scopus)

Structures of filled ice nanotubes inside carbon nanotubes

Takaiwa, D., Koga, K. & Tanaka, H., Jan 2007, In : Molecular Simulation. 33, 1-2, p. 127-132 6 p.

Research output: Contribution to journalArticle

Carbon Nanotubes
Ice
Nanotubes
Carbon nanotubes
nanotubes
2006
27 Citations (Scopus)

Close-packed structures and phase diagram of soft spheres in cylindrical pores

Koga, K. & Tanaka, H., Apr 7 2006, In : The Journal of Chemical Physics. 124, 13, 131103.

Research output: Contribution to journalArticle

Phase diagrams
diagrams
phase diagrams
Phase boundaries
porosity
4 Citations (Scopus)

Line adsorption in a mean-field density-functional model

Koga, K. & Widom, B., Nov 2006, In : Molecular Physics. 104, 22-24, p. 3469-3477 9 p.

Research output: Contribution to journalArticle

Adsorption
adsorption
Gibbs adsorption equation
analogs
Thermodynamics
6 Citations (Scopus)
Ice
Hydrates
Water
Liquids
Thermodynamic stability
2005
28 Citations (Scopus)

Formation of ice nanotube with hydrophobic guests inside carbon nanotube

Tanaka, H. & Koga, K., Sep 1 2005, In : The Journal of Chemical Physics. 123, 9, 094706.

Research output: Contribution to journalArticle

Carbon Nanotubes
Ice
Nanotubes
nanotubes
ice
18 Citations (Scopus)

On the thermodynamic stability and structural transition of clathrate hydrates

Koyama, Y., Tanaka, H. & Koga, K., 2005, In : The Journal of Chemical Physics. 122, 7, 074503.

Research output: Contribution to journalArticle

clathrates
Hydrates
Ethane
hydrates
Methane