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

2016 Fiscal Year Annual Research Report

• Project/Area Number: 15K17987
• 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
• Keywords: suspended graphene / thermal conductivity / substrate effect / heat spreader / width dependence

Outline of Annual Research Achievements

The project has been smoothly carried out. Some important results have been achieved in the last year. Firstly, we have successfully designed and fabricated H-type sensor for measuring the thermal conductivity of graphene ribbon. The measured thermal conductivities of graphene by using both T-type sensor and H-type sensor agree well with each other, proving the good accuracy of our MEMS sensor method. The thermal conductivity of suspended monolayer graphene is over 2000 W/mK, much higher than the value of supported graphene on SiO2 substrate, 600 W/mK. We also confirmed width dependence of graphene thermal conductivity. Several papers have been published.

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: 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 Pages: 045706
  • DOI: 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 graphene electronic device and its property characterization (2016)
  • Author(s): Wang H D, Kurata K, Fukunaga T, Takamatsu H, Zhang X, Ikuta T, Takahashi K, Nishiyama T, Ago H, Takata Y
  • Journal Title: Sensors and Actuators A: Physical Volume: 247 Pages: 24-29
  • DOI: DOI: 10.1016/j.sna.2016.05.002
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Simultaneous measurement of electrical and thermal conductivities of suspended monolayer graphene (2016)
  • Author(s): Wang H D, Kurata K, Fukunaga T, Takamatsu H, Zhang X, Ikuta T, Takahashi K, Nishiyama T, Ago H, Takata Y
  • Journal Title: Journal of Applied Physics Volume: 119 Pages: 244306
  • DOI: http://dx.doi.org/10.1063/1.4954677
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [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 – 2017-03-30
  • 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 – 2017-03-22
  • 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 – 2016-10-06
  • Int'l Joint Research