Measurement techniques for thermophysical properties of low-dimensional materials for next-generation electronics

2019 Fiscal Year Final Research Report

• Project/Area Number: 17H03186
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Kyushu University
• Principal Investigator: Takahashi Koji 九州大学, 工学研究院, 教授 (10243924)
• Co-Investigator(Kenkyū-buntansha): 李 秦宜 九州大学, 工学研究院, 助教 (60792041) ; 生田 竜也 九州大学, 工学研究院, 技術専門職員 (70532331) ; 西山 貴史 福岡大学, 工学部, 助教 (80363381)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: ２次元材料 / 熱伝導率 / 界面熱抵抗 / ラマン分光法

Outline of Final Research Achievements

From the viewpoint of next-generation electronics, thermophysical properties of low-dimensional materials are experimentally treated by using new measurement techniques. Variable-spot-size Raman method was developed and applied to WS2 and the effect of substrate was found to degrade the thermal conductivity to one third. Laser-flash Raman method was applied to MoS2. In addition, graphene nano ribbon was found to have very high thermoelectric performance. Nanobubbles at the graphene-liquid interface were also explored by using AFM.

Free Research Field

ナノマイクロ熱工学

Academic Significance and Societal Importance of the Research Achievements

次世代のエレクトロニクスでは２次元材料とそのヘテロ構造が期待されているが、それらの熱物性は不明なことが多く正確な熱設計ができない原因となっている。本研究では各種２次元材料単体およびそれらを基板上に積層させた構造の熱伝導特性を計測可能な新規手法の開発に成功し、将来の２次元材料応用における基盤的知見となる熱工学的成果を得た。