[Thermal Control] Year Started : 2018

Koji Takahashi

Innovation of phase change heat transfer by utilizing two-dimensional materials

Research Director
Koji Takahashi

Professor
Graduate School of Engineering
Kyushu University

Collaborator
Hiroki Ago Professor
Global Innovation Center
Kyushu University
Yasutaka Yamaguchi Associate Professor
Graduate School of Engineering
Osaka University
Outline

This research utilizes the flatness and structural versatility of two-dimensional materials to enhance the liquid-vapor phase change heat transfer, especially for the thermal management of mobile electronic devices. By integrating in-situ TEM observation, Raman spectroscopy, molecular dynamics simulations and material synthesis, we aim to understand and control thermofluid phenomena at the nanoscale. Our final goal is to innovate heat transfer systems with efficient supply and robust evaporation of the refrigerant from the nanoscale.

Tsunehiro Takeuchi

Investigation into unusual behaviors in electron and lattice thermal conductivity

Research Director
Tsunehiro Takeuchi

Professor
Energy Materials Laboratory
Toyota Technological Institute

Collaborator
Yoshinori Okada Assistant Professor
Quantum Materials Science Unit
Okinawa Institute of Science and Technology Graduate University
Kazunori Sato Associate Professor
Graduate School of Engineering
Osaka University
Fuyuki Shimojo Professor
Graduate School of Science and Technology
Kumamoto University
Yong Chen Principal Investigator
Advanced Institute for Materials Research
Tohoku University
Outline

In this project, we investigate the origin and mechanism leading to unusual behaviors of electron and lattice thermal conductivity by full use of precise electron and heat transport measurements, detailed structure analyses, direct observations of electronic structure and phonon dispersions, first principles calculations, the latest molecular dynamics, and simulations of electron and heat transport properties. Widely usable guiding principles for the development of high-performance heat management devices, such as thermal diodes, heat switching devices, thermoelectric generators, and Peltier coolers, will be constructed using the knowledge of unusual thermal conductivity accumulated by the fundamental, highly sophisticated investigations. Prototypes of high-performance heat management devices will be also developed to demonstrate the reliability of the constructed guiding principle.

Masakazu Nakamura

Molecular Junction Approach for Wide-Range Control of Thermal Conductivity in Nano-Carbon-Based Materials

Research Director
Masakazu Nakamura

Professor
Graduate School of Materials Science
Nara Institute of Science and Technology

Collaborator
Ichiro Yamashita Specially Appointed Professor
Graduate School of Engineering
Osaka University
Outline

In nano-carbon (carbon nanotube, graphene, etc.) composite materials, a junction between nano-carbon units is a key factor determining the thermal transport. By understanding and controlling the nano-scale thermal transport at organic or organic/inorganic-hybrid molecular junctions formed between nano-carbon units, we aim at controlling the thermal conductivity of electrically conducting materials over an extremely wide range from those of thermal insulators to diamonds.

Takanori Fukushima

Thermal management using molecular dynamics

Research Director
Takanori Fukushima

Professor
Institute of Innovative Research
Tokyo Institute of Technology

Collaborator
Tomoyuki Akutagawa Professor
Institute of Multidisciplinary Research for Advanced Materials
Tohoku University
Atsushi Shishido Professor
Institute of Innovative Research
Tokyo Institute of Technology
Hisao Nakamura Team Leader
Research Center for Computational Design of Advanced Functional Materials
National Institute of Advanced Industrial Science and Technology
Tomoaki Nishino Associate professor
Department of Chemistry Graduate School of Science and Engineering
Tokyo Institute of Technology
Outline

This research aims to create a new science that correlates “thermal properties of organic materials” with “molecular dynamics”, thereby establishing the design principle of organic materials for thermal management. By combining the scientific knowledge that will be obtained through the works and molecular technology that enables precise control of the structure and orientation of organic molecules or polymers, this research group intends to develop innovative thermal-management systems and devices including flexible thermal diodes and switches based on organic materials.

Yuhei Miyauchi

Thermo-excitonics based on nanomaterials science

Research Director
Yuhei Miyauchi

Professor
Institute of Advanced Energy
Kyoto University

Collaborator
Satoru Konabe Associate Professor
Faculty of Bioscience and Applied Chemistry
Hosei University
Takeshi Tanaka Group Leader
Nanomaterials Research Institute
National Institute of Advanced Industrial Science and Technology (AIST)
Takahiro Yamamoto Professor
Faculty of Science Division I
Tokyo University of Science
Outline

We will study fundamental physics of the thermal exciton generation phenomenon that has recently been observed and verified in carbon nanotubes for the first time, and clarify its potential for future applications. Particularly, we will try to create a new thermal photonic technology that enables high performance solar photovoltaic conversion with efficiency beyond the standard theoretical limit, based on the thermal exciton effects and nanoscience-based thermal control technology.

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