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Tomofumi Ukai

Faculty
Graduate School of Interdisciplinary New Science
Course of Bio-Nano Science Fusion
PositionAssociate Professor
Mail
HomepageURL
Birthday
Last Updated :2019/05/30

Researcher Profile and Settings

Education

  •  - 2000 , Toyo University, Graduate School, Division of Engineering

Degree

  • Ph.D., Toyo University

Research Activities

Research Areas

  • Applied physics, Engineering fundamentals
  • Mechanical engineering, Thermal engineering

Research Interests

    Numerical Simulation, Complex fluids

Published Papers

Misc

  • Electrophoretic mobility and resultant zeta potential of an individual cell analyzed by electrophoretic Coulter method, N. Takahashi, A. Aki, T. Ukai, Y. Nakajima, T. Maekawa, T. Hanajiri, 2009 International Semiconductor Device Research Symposium, ISDRS '09,   2009 12 01
  • Equilibrium patterns of chain clusters composed of ferromagnetic particles in an external magnetic field, Tomofumi Ukai, Toru Maekawa, Hisao Morimoto, International Journal of Modern Physics B, 16,   2002 07 20 , We carry out Monte Carlo simulations of a ferromagnetic colloidal system, which is subjected to an external magnetic field, to investigate the structures formed by chain clusters. The control parameters are the ratio of the dipole moment energy to thermal energy, λ, and the ratio of the interactive energy between the dipole and the external magnetic field to thermal energy, ξ. We investigate the effect of the system height on the pattern formations for λ = 18 and ξ = 30, ∞. Note that the system becomes paramagnetic when ξ = ∞. We find that as the system height increases, chains coagulate to form fat clusters and spatially ordered structures are created when ξ = 30, whereas chains form thin meandering walls when ξ = ∞.

Conference Activities & Talks

  • Characterization of Biological Cell Viability by Electrophoretic Coulter Method, Y. Nakajima, T. Ukai, T. Mizuki, S. Mohamed and T. Hanajiri, The 12th IEEE international Conference on Nano/Molecular Medicine and Engineering,   2018 12 02
  • Structures Formed via Self-assembly in a Superparamagnetic Colloidal Suspension Subjected to an External Magnetic Field, Tomofumi Ukai, Yuto Hamada, T. Maekawa and H. Morimoto, 13th International conference on surfaces, coatings and nanostructured materials,   2018 09 11
  • Electrophoretic Coulter method for identification of normal cells or dead cells, Y. Nakajima, T. Ukai, T. Mizuki and T. Hanajiri, 5th European Conference on Microfluidics 2018,   2018 02 28
  • Detection and analysis of targeted biological cells by electrophoretic Coulter method, Y. Nakajima, T. Ukai, T. Mizuki and T. Hanajiri, 9th International Conference on Materials for Advanced Technologies,   2017 06 18
  • Detection of antigen-antibody reactions by the measurement of the electrophoretic mobility of particles, Y. Yamamoto, T. Ukai, N. Hirosawa, Y. Sakamoto, H. Nakajima, S. Higuchi, T. Narisawa, T. Maeda, T. Takahashi and T. Maekawa, 10th International Conference on Surfaces, Coatings and Nano-Structured Materials,   2015
  • The Improvement of Accuracy and Precision in Electrophoretic Coulter Method, T. Shimizu, T. Mizuki, T. Ukai, Y. Nakajima and T. Hanajiri, 8th International Conference on Materials for Advanced Technologies of the Materials Research Society of Singapore & 16th IUMRS-International Conference in Asia Together with 4th Photonics Global Conference 2015,   2015
  • Fabrication of micrometer sized magnetic discs of circular and triangular shapes, Y. Nagaoka, A. Aoki, T. Ukai, H. Morimoto and T. Maekawa, 9th International Conference on Surfaces, Coatings and Nanostructured Materials,   2014
  • Synthesis of magnetic microparticles in a crisscross microchannel using a photoresist, L. Yang, T. Ukai and T. Maekawa, International Soft Matter Conference 2013,   2013
  • Fabrication of circular and triangular magnetic discs, S. Aoki, Y. Nagaoka, T. Ukai, H. Morimoto and T. Maekawa, International Soft Matter Conference 2013,   2013
  • Surface modification of polydimethylsiloxane elastomer for microfluidic systems using a vacuum ultraviolet light, T. Ukai and T. Maekawa, International Soft Matter Conference 2013,   2013
  • Dynamics of magnetically controlled magnetic nano/micro objectes on the surface of a substrate, Y. Nagaoka, T. Ukai, M. Suzuki, R. Hironaga, H. Morimoto N. Grobert and T. Maekawa, 7th International Conference on Surface, Coatings and Nanostructured Materials,   2012
  • Surface modification of polydimethylsiloxane for the development of biocompatible microfluidic devices irradiating a vacuum ultraviolet light, T. Ukai and T. Maekawa, 7th International Conference on Surface, Coatings and Nanostructured Materials,   2012
  • Folate conjugated biocompatible fluorescent carboxymethyl cellulose nanoparticles, A.R. Girija, B. Sivakumar, B. Dhandayuthapani, T. Ukai, Y. Yoshida, T. Maekawa and D.S. Kumar, India-Japan Symposium on Challenges in Global Health and Environment,   2011
  • Manipulation of carbon nanotubes by dielectrophoresis, T. Ukai and T. Maekawa, The 15th International Symposium on Applied Electromagnetics and Mechanics,   2011
  • Cluster structures formed by paramagnetic particles subjected to a dc magnetic field, K. Hoshino, T. Ukai, T. Maekawa and H. Morimoto, The 15th International Symposium on Applied Electromagnetics and Mechanics,   2011
  • Dynamic of magnetic colloidal particles on a nonmagnetic substrate under a rotational magnetic field, R, Hironaga, Y. Nagaoka, T. Ukai, H Morimoto. and T. Maekawa, International Soft Matter Conference 2010,   2010
  • Aggregation of superparamagnetic particles in a rotational magnetic field, T. Ukai, H. Morimoto and T. Maekawa, International Soft Matter Conference 2010,   2010
  • Electrophoretic mobility and resultant zeta potential of an individual cell analyzed by electrophoretic Coulter method, N. Takahashi, A. Aki, T. Ukai, Y. Nakajima, T. Maekawa, T. Hanajiri, 2009 International Semiconductor Device Research Symposium, ISDRS '09,   2009 12 01
  • Cluster-cluster Aggregation of Superparamagnetic Particles Subjected to a Rotational Magnetic Field, T. Ukai, K. Inoue, H. Morimoto and T. Maekawa, The 14th International Symposium on Applied Electromagnetics and Mechanics,   2009
  • Electrophoretic Coulter method for analyzing surface properties of particles using a micro-fluidic device, N. Takahashi, A. Aki, T. Ukai, Y. Nakajima, International Conference on Materials for Advanced Technologies,   2009
  • Structures and dynamics of clusters formed by magnetic colloidal particles under ac-dc combined magnetic fields, Y. Nagaoka, T. Ukai, H. Morimoto and T. Maekawa, The 11th International Conference on Electrorheological (ER) Fluid and Magnetorheological (MR) suspensions (ERMR 2008),   2008
  • Cluster-cluster aggregation of superparamagnetic particles in a rotational magnetic field, T. Ukai and T. Maekawa, The 11th International Conference on Electrorheological (ER) Fluid and Magnetorheological (MR) suspensions (ERMR 2008),   2008
  • Precise Manipulation of Magnetic Carbon Nanotubes by a Rotational Magnetic Field, T. Maekawa, H. Morimoto, A. Eto, Y. Nagaoka, T. Ukai and N. Grobert, 2008 International Conference on Carbon, CARBON ’08,   2008
  • Detection of antigen-antibody reactions on individual cell’s surface using micro-channels, A. Aki, Y. Nihei, T. Ukai, H. Morimoto and T. Maekawa, The 13th International Symposium on Applied Electromagnetics and Mechanics (ISEM),   2007
  • How can you put one DNA molecule to a nano-gap between electrodes?, T. Higashi, Y. Nakajima, Y. Yamazaki, T. Ukai, T. Hanajiri, A. Inoue, T. Maekawa and T. Sugano, ICMAT2007-International Conference on Materials for Advanced Technologies 2007,   2007
  • Cluster-Cluster Aggregations of Superparamagnetic Particles in a Rotational Magnetic field, T. Ukai and T. Maekawa, The 10th International Conference on Electrorheological (ER) Fluid and Magnetorheological (MR) suspensions (ERMR 2006),   2006
  • Structures and Dynamics of Clusters Composed of Paramagnetic Particles Subjected to Both AC and DC Magnetic Field, Y. Nagaoka, H. Morimoto, T. Ukai and T. Maekawa, The 10th International Conference on Electrorheological (ER) Fluid and Magnetorheological (MR) suspensions (ERMR 2006),   2006
  • Measurement of Zeta Potential of Living Cells for the Investigation of Their Electrorheological Caracteristics, A. Aki, H. Asai, Y. Nihei, T. Ukai and T. Maekawa, The 10th International Conference on Electrorheological (ER) Fluid and Magnetorheological (MR) suspensions (ERMR 2006),   2006
  • Measurement of zeta potential of living cells, A. Aki, T. Ukai, N. Kato and T. Maekawa, International Symposium on Interdisciplinary Electromagnetic, Mechanic & Biomedical Problems (ISEM 2005),   2005
  • Patterns formed by paramagnetic particles in a dc magnetic field, T. Ukai and T. Maekawa, The Ninth International Conference on Electrorheological Fluids and Magneto-rheological Suspensions,   2004
  • Patterns Formed in a Magnetorheological Fluid Subjected to a Uniform dc Magnetic Field, T. Ukai and T. Maekawa, The 3rd International Conference on Slow Dynamics in Complex Systems,   2003
  • Brownian Dynamics Analysis of Cluster Patterns Created by Paramagnetic Particles in a dc Magnetic Field, T. Ukai and T. Maekawa, The 8th Joint European Thermodynamics Conference,   2003
  • Secondary Structures Created by Chain Clusters of Paramagnetic Particles in a dc Magnetic Field, T. Ukai and T. Maekawa, The 6th ASME-JSME Thermal Engineering Conference,   2003
  • Secondary Structures Created by Paramagnetic Chain Clusters, T. Ukai and T. Maekawa, The 5th International Conference on Fundamental and Applied MHD,   2002
  • Pattern Formations in Ferromagnetic and Paramagnetic Colloidal Systems Subjected to External dc Magnetic Fields, T. Ukai, T. Maekawa and H. Morimoto, The First International Symposium on Advanced Fluid Information,   2001
  • Equilibrium and Dynamic Analysis of Magnetic Characteristics of a Triangular Ferromagnetic Lattice System, T. Ukai and T. Maekawa, The 8th International Symposium on Electrorheological Fluids and Magnetotheological Suspensions,   2001
  • Equilibrium Patterns of Chain Clusters Composed of Ferromagnetic Particles in an External Magnetic Field, T. Ukai, H. Morimoto and T. Maekawa, The 8th International Conference on Electrorheological Fluids and Magnetotheological Suspensions,   2001
  • Self-Organisation in Triangular and Square Ferromagnetic Lattice Systems, T. Ukai, T. Maekawa and H. Morimoto, The 10th International Symposium on Applied Electromagnetics and Mechanics,   2001
  • Self-Organization in Triangular and Square Ferromagnetic Lattice Systems, Proceedings of The 10th International Symposium on Applied Electromagnetics and Mechanics,   2001
  • Magnetic Self-Organisation in a Triangular Ferromagnetic Lattice System, T, Ukai, H. Morimoto and T. Maekawa, The 4th International PAMIR Conference on Magnetohydrodynamic at Dawn of 3rd Millennium,   2000
  • Brownian dynamics analysis of magnetic order-disorder transition in a ferromagnetic colloidal system, T. Ukai, H. Morimoto and T. Maekawa, The 7th International Conference on Electro-rheological (ER) Fluids and Magneto-rheological Suspensions,   1999

Research Grants & Projects

  • Magnetic characteristics and structures of magnetic colloidal systems