Study of graphene interfacial effect for the development of nano heat spreader

• Project/Area Number: 15K17987
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Thermal engineering
• Research Institution: Kyushu University
• Principal Investigator: Wang Haidong 九州大学, 工学研究院, 助教 (30729405)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: suspended graphene / thermal conductivity / substrate effect / heat spreader / width dependence

Outline of Final Research Achievements

Graphene have ultrahigh thermal conductivity, making it a promising material for spreading waste heat from the hotspot to the heat sink. However, the interfacial effect has significant influence on the thermal conductivity of graphene, it may greatly reduce the performance of the graphene heat spreader. It is necessary to investigate the interfacial effect between graphene and substrate quantitatively. In this project, we used T-type and H-type sensors to measure the thermal conductivity of suspended graphene. Comparing with the supported graphene on substrate (600 W/mK), the suspended graphene has much higher thermal conductivity, over 2000 W/mK. It demonstrates that the interfacial phonon scattering has dominant effect on the thermal conductivity of graphene.

Research Products

• [Journal Article] Width depended intrinsic thermal conductivity of suspended monolayer graphene (2017)
  • Author(s): Wang H D, Kurata K, Fukunaga T, Zhang X, Takamatsu H
  • Journal Title: International Journal of Heat and Mass Transfer Volume: 105 Pages: 76-80
  • DOI: 10.1016/j.ijheatmasstransfer.2016.09.054
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Ultraclean suspended monolayer graphene achieved by in situ current annealing (2016)
  • Author(s): Wang H D, Zhang X, Takamatsu H
  • Journal Title: Nanotechnology Volume: 28 Issue: 4 Pages: 045706-045706
  • DOI: 10.1088/1361-6528/28/4/045706
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] A general method of fabricating free-standing, monolayer grapheneelectronic device and its property characterization (2016)
  • Author(s): H. Wang, K. Kurata, T. Fukunaga, H. Ago, H. Takamatsu, X. Zhang, T. Ikuta, K. Takahashi, T. Nishiyama, T. Takada
  • Journal Title: Sensors and Actuators A Volume: 247 Pages: 24-29
  • DOI: 10.1016/j.sna.2016.05.002
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Simultaneous measurement of electrical and thermal conductivities of suspended monolayer graphene (2016)
  • Author(s): H. Wang, K. Kurata, T. Fukunaga, H. Takamatsu, X. Zhang, T. Ikuta, K. Takahashi, T. Nishiyama, H. Ago, Y. Takata
  • Journal Title: Journal of Applied Physics Volume: 119 Issue: 24 Pages: 244306-244306
  • DOI: 10.1063/1.4954677
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] In-situ measurement of the heat transport in defectengineered free-standing single-layer graphene (2016)
  • Author(s): H. Wang, K. Kurata, T. Fukunaga, H. Takamatsu, X. Zhang, T. Ikuta, K. Takahashi, T. Nishiyama, H. Ago, Y. Takata
  • Journal Title: Scientific Reports Volume: 6 Issue: 1 Pages: 21823-21823
  • DOI: 10.1038/srep21823
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A simple method for fabricating free-standing large area fluorinated single-layer graphene with size-tunable nanopores (2016)
  • Author(s): H. Wang, K. Kurata, T. Fukunaga, H. Takamatsu, X. Zhang, T. Ikuta, K. Takahashi, H. Ago, Y. Takata
  • Journal Title: Carbon Volume: 99 Pages: 564-570
  • DOI: 10.1016/j.carbon.2015.12.070
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Width-dependent thermal conductivity of suspended single- layer graphene (2017)
  • Author(s): Wang H D
  • Organizer: 1st Asian Conference on Thermal Science
  • Place of Presentation: Jeju Island, Korea
  • Year and Date: 2017-03-26
  • Int'l Joint Research
• [Presentation] Highly sensitive charge mobility of suspended monolayer graphene (2017)
  • Author(s): Wang H D
  • Organizer: 6 th International Symposium on Micro and Nano Technology
  • Place of Presentation: Fukuoka, Japan
  • Year and Date: 2017-03-19
  • Int'l Joint Research
• [Presentation] Effect of nanohole defect on the thermal conductivity of free-standing single-layer graphene (2016)
  • Author(s): Wang H D
  • Organizer: 11th Asian Thermophysical Properties Conference
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 2016-10-02
  • Int'l Joint Research