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- Thermal Science and Control of Spectral Energy Transport/
- [Thermal Control] Year Started : 2018
Assistant Professor
Graduate School of Pharmaceutical Sciences
The University of Tokyo
This research investigates the thermal signaling mechanisms of biological cells, in which temperature change in nanometer spaces in cells serves as a driving force of cellular functions. First, we will determine the thermodynamic properties of living cells using our original methodologies for measuring intercellular temperature and heat in cells. Next, we will elucidate the molecular mechanisms of maintenance and utilization of intercellular heat. Lastly, we will examine the effect of nanoscale thermodynamic characteristics on macroscale thermal signaling.
Associate Professor
Institute for Materials Research
Tohoku University
In this project, I will develop a novel thermal switching system that reversibly functions via voltage control without mechanical drive parts. The system utilizes electrochemical intercalation/de-intercalation reactions of guest atoms within guest-host type inclusion compounds as observed in electrode materials for lithium-ion batteries. Achievements of the project will open a new pathway for realizing an energy-saving society by enabling optimal transfer and redistribution of the vast quantities of waste heat from vehicles and industries.
Assistant Professor
School of Science
Tokyo Institute of Technology
Single-molecule junctions have attracted wide attention due to their potential application of molecular electronics; however, their thermal transport mechanism has not been completely understood. The objective of this study is to develop a thermometry technique for a single-molecule junction based on surface enhanced Raman scattering (SERS). Herein, by combining the results obtained from current-voltage response, SERS, and thermopower, I investigate the thermal properties of the single-molecule junction and aim to develop innovative molecular devices.
Senior Researcher
Research Center for Advanced Measurement and Characterization
National Institute for Materials Science
This research is aimed at establishing a fundamental technology for measuring and visualizing the dispersion relations and transport properties of phonons with a spatial resolution of less than 10 nanometers. Advanced electron microscopy and spectroscopy with a good balance among spatial, energy and momentum resolutions at a high level is applied for phonon measurements. Although studies on nanoscale phonon properties have relayed on predictions using numeric calculations, the fundamental technology obtained in this research enables us to observe their actual properties.
Associate Professor
Institute of Engineering
Tokyo University of Agriculture and Technology
I have produced transparent materials with zero reflectance and a wide range of refractive indices such as an extremely high refractive index greater than 10 and a refractive index of zero. This study develops an understanding of principles of the transparent materials with the unprecedented refractive indices. This study will also produce the materials in the infrared region and aim at active control of the material properties. The materials will be applied to devices for active control of thermal radiation such as selectivity of time, switching, directivity, and arbitrarily phases for the reuse of thermal radiation.
Assistant Professor
Molecular Photoscience Research Center
Kobe University
Although heat transport in materials is typically mediated by phonons and electrons, the collective excitation of the spin degree of freedom “magnons” can also carry heat. In particular, magnons in low-dimensional magnetic materials are attractive because of its large contribution to the thermal conductivity and unusual dynamics originating from distinctive spin structures. The aim of this research is to understand and control the magnon heat transport by using advanced electron spin resonance technique from microwave to terahertz region. The achievements of this research will lead to new techniques and devices to control the heat propagation in solids.
Assistant Professor
School of Engineering
Tohoku University
Thermal conductivity and interfacial resistance dominate heat flow in solids. In this research, I aim to change these values by application of an electric field and control the heat flow and its direction actively and spatio-temporally. To achieve that, I focus on spin thermal conductivity materials and composites and attempt to fabricate novel thermal management materials with the tunable thermal conductivity that contribute to high stability of electronic devices and effective reuse of heat.
Associate Professor
Institute of Materials and Systems for Sustainability
Nagoya University
Recently, control of heat transport at cryogenic temperature using wave nature of phonon was demonstrated by phononic crystal made by microfabrication technology. In this project, we will develop materials for controlling heat transport at room temperature. We aim to demonstrate the control of heat transport at room temperature by titanium oxide natural superlattice which has periodic structure with high perfection and tenability as a material for suppressing heat transport of high frequency thermal phonons.
Associate Professor
School of Engineering
Tokyo Institute of Technology
Covalent organic frameworks (COFs) are crystalline porous materials that possess significantly high degree of freedom in the structural design and high potential as a future material. This research synthesizes COFs and carries out the structural and thermal mode analyses to acquire fundamental understandings related to the heat transfer mechanisms. Furthermore, this research pursues creations of novel heat transfer controlling materials whose functions cannot be achieved with conventional materials.