Nanoscale heat transport mechanisms across heterogeneous interfaces

Prof. Junichiro SHIOMI, the University of Tokyo, Japan

14:00-15:00, June 10, 2022

Tencent Meeting Room: 368 655 387 (Password 627692)

Biography

Prof. Junichiro Shiomi received the B.E. (1999) from Tohoku University, and Ph. D. (2004) from Royal Institute of Technology (KTH), Sweden. He is currently a Professor in Department of Mechanical Engineering, The University of Tokyo. His research interests include heat conduction of nanomaterials, polymer composites, and thermoelectrics, phase change and fluidics in nanoscale, interfacial thermofluid dynamics, thermal convections, and materials informatics. He is a recipient of the Zeldovich Medal from the Committee on Space Research, Young Scientists' Prize, the Commendation for Science and Technology by the Minister of Educational, Culture, Sports, Science and Technology, and the Academic award of Heat Transfer Society of Japan.

Abstract

Interfacial thermal resistance is the primary impediment to heat flow in materials and devices as characteristic lengths become comparable to the mean-free paths of the energy carriers. This thermal boundary conductance across solid interfaces at the nanoscale can affect a plethora of applications. Here, we focus on discussions of works that have pushed the limits to interfacial heat transfer and drastically increased the understanding of thermal boundary conductance on the atomic and nanometer scales near solid/solid heterogeneous interfaces. Especially, we show recent progress in nanoscale heat transport mechanisms across cabon/metal interfaces, with emphasis on interfacial phonon spectra. Also, we will simply discuss the future directions and avenues of research that can further the knowledge of heat transfer across metal/non-metal systems with various interface defects.

Selected Publications

[1] Y. Liao, S. Lwamoto, M. Sasaki, M. Goto, J. Shiomi, Heat conduction below diffusive limit in amorphous superlattice structures, Nano energy, 84, (2021) 105903.

[2] S. Ju, R. Yoshida, C. Liu, S. Wu, K. Hongo, T. Tadano, J. Shiomi, Exploring diamondlike lattice thermal conductivity crystals via feature-based transfer learning, Physical review materials, 5 (2021) 053801.

[3] B. Xu, S.W. Hung, S. Hu, C. Shao, R. Guo, J. Choi, T. Kodama, F.R. Chen, J. Shiomi, Scalable monolayer-functionalized nanointerface for thermal conductivity enhancement in copper/diamond composite, Carbon, 175 (2021) 299-306.

[4] B. Xu, S. Hu, S.W. Hung, C. Shao, H. Chandra, F.R. Chen, T. Kodama, J. Shiomi, Weaker bonding can give larger thermal conductance at highly mismatched interfaces, Science Advances, 7 (2021) eabf8197.

[5] R. Hu, J. Shiomi, Thermal nanostructure design by materials informatics, Springer series in materials science, 312 (2021) 153-195.

[6] N. Tambo, Y. Liao, C. Zhou, E.M. Ashley, K. Takahashi, P.F. Nealey, Y. Naito, J. Shiomi, Ultimate suppression of thermal transport in amorphous silicon nitride by phononic nanostructure, Science advances, 6 (2020) eabc0075.

[7] S.W. Hung, S. Hu, J. Shiomi, Spectral control of thermal boundary conductance between copper and carbon crystals by self-assembled monolayers, ACS Applied Electronic Materials, 1 (2019) 2594-2601.

[8] A. Ota, M. Ohnishi, H. Oshima, T. Shiga, T. Kodama, J. Shiomi, Enhancing thermal boundary conductance of graphite-metal interface by triazine-based molecular bonding, ACS Applied Materials and Interfaces, 11 (2019) 37295-37301.

[9] Y. Liao, T. Shiga, M. Kashiwagi, J. Shiomi, Akhiezer mechanism limits coherent heat conduction in phononic crystals, Physical review B, 98 (2018) 134307.

[10] M. Yamawaki, M. Ohnishi, S. Ju, J. Shiomi, Multifunctional structural design of graphene thermoelectrics by Bayesian optimization, Science advances, 4 (2018) eaar4192.