Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
DONG HAI WANG Last modified date:2018.05.16

Assistant Professor / Thermal engineering / Department of Mechanical Engineering / Faculty of Engineering


Papers
1. Haidong Wang, Dingshan Zheng, Xing Zhang, Hiroshi Takamatsu and Weida Hu, Benchmark characterization of the thermoelectric properties of individual single-crystalline CdS nanowires by a H-type sensor, RSC Advances, DOI: 10.1039/c7ra02734f, 7, 25298-25304, 2017.08.
2. Haidong Wang, Shiqian Hu, Koji Takahashi, Xing Zhang, Hiroshi Takamatsu and Jie Chen, Experimental study of thermal rectification in suspended monolayer graphene, Nature Communications, doi:10.1038/ncomms15843, 8, 15843, 2017.06.
3. Masahiro Narasaki, DONG HAI WANG, Yasuyuki Takata, Koji Takahashi, Influence of ion beam scattering on the electrical resistivity of platinum hot films, Microelectronic Engineering, 166, 15-18, 2016.11.
4. Tianzhuo Zhan, DONG HAI WANG, Yibin Xu, Unexpectedly high thermal boundary resistance of Cr/graphene/SiO2 structure, Japanese Journal of Applied Physics, 56, 055101, 2017.03.
5. DONG HAI WANG, Xing Zhang, Hiroshi Takamatsu, Ultraclean suspended monolayer graphene achieved by in situ current annealing, Nanotechnology, 28, 045706, 2016.12.
6. DONG HAI WANG, Kosaku Kurata, Takanobu Fukunaga, Hiroshi Takamatsu, Xing Zhang, Simultaneous measurement of electrical and thermal conductivities of suspended monolayer graphene, Journal of Applied Physics, 119, 244306, 2016.08.
7. DONG HAI WANG, Kosaku Kurata, Takanobu Fukunaga, Hiroshi Takamatsu, Xing Zhang, A general method of fabricating free-standing, monolayer graphene electronic device and its property characterization, Sensors and Actuators A: Physical, 247, 24-29, 2016.05.
8. DONG HAI WANG, Kosaku Kurata, Takanobu Fukunaga, Hiroshi Takamatsu, Xing Zhang, Width depended intrinsic thermal conductivity of suspended monolayer graphene, International Journal of Heat and Mass Transfer, 105, 76-80, 2017.01.
9. DONG HAI WANG, Kosaku Kurata, Takanobu Fukunaga, Hiroshi Takamatsu, Xing Zhang, Tatsuya Ikuta, Koji Takahashi, Takashi Nishiyama, Hiroki Ago, Yasuyuki Takata, In-situ measurement of the heat transport in defect-engineered free-standing single-layer graphene, Scientific Reports, DOI: 10.1038/srep21823, 6, 21823, 2016.02, Utilizing nanomachining technologies, it is possible to manipulate the heat transport in graphene by introducing different defects. However, due to the difficulty in suspending large-area single-layer graphene (SLG) and limited temperature sensitivity of the present probing methods, the correlation between the defects and thermal conductivity of SLG is still unclear. In this work, we developed a new method for fabricating micro-sized suspended SLG. Subsequently, a focused ion beam (FIB) was used to create nanohole defects in SLG and tune the heat transport. The thermal conductivity of the same SLG before and after FIB radiation was measured using a novel T-type sensor method on site in a dualbeam system. The nanohole defects decreased the thermal conductivity by about 42%. It was found that the smaller width and edge scrolling also had significant restriction on the thermal conductivity of
SLG. Based on the calculation results through a lattice dynamics theory, the increase of edge roughness and stronger scattering on long-wavelength acoustic phonons are the main reasons for the reduction in thermal conductivity. This work provides reliable data for understanding the heat transport in a defective SLG membrane, which could help on the future design of graphene-based electrothermal devices..
10. DONG HAI WANG, Kosaku Kurata, Takanobu Fukunaga, Hiroshi Takamatsu, Xing Zhang, Tatsuya Ikuta, Koji Takahashi, Takashi Nishiyama, Hiroki Ago, Yasuyuki Takata, A simple method for fabricating free-standing large area fluorinated single-layer graphene with size-tunable nanopores, Carbon, http://dx.doi.org/10.1016/j.carbon.2015.12.070, 99, 564-570, 2016.01, As a solid-state membrane with only one-atom thickness, nano-porous graphene has attracted intense attention in many critical applications. Here, the key challenge is to suspend a single-layer graphene (SLG) and drill nanopores with precise dimensions. Here, we report a simple and reliable route for making suspended fluorinated SLG with size-tunable nanopores. Our method consists of two steps: 1. a free-standing SLG ribbon was created between two gold pads after deep dry etching of silicon substrate by xenon difluoride. The SLG was fluorinated by 5e13%. Superior to the normal wet etching method, the dry etching process is much simpler and results in less hole-defect and edge deformation. A large area fluorinated SLG can be suspended due to the sufficient etch depth. 2. a focused ion beam was introduced to drill nanopores in graphene with an initial diameter around 20 nm. Followed by an electron beam induced carbon deposition, the diameter of nanopore was gradually decreased to sub-10 nm. By changing the deposition time, the size of nanopore can be precisely controlled. High-cost transmission electron microscope is no longer needed. Our method provides a simple and effective way for preparing free-standing fluorinated SLG ribbon suitable for single-molecule detection..
11. Kazuhiro Nishimura, DONG HAI WANG, Takanobu Fukunaga, Kosaku Kurata, Hiroshi Takamatsu, Measurement of in-plane thermal and electrical conductivities of thin film using a micro-beam sensor: A feasibility study using gold film, International Journal of Heat and Mass Transfer, http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.12.047, 95, 727-734, 2016.01, A new method is proposed for measuring the in-plane thermal conductivity of thin films using a freestanding micro-beam metallic sensor. The sensor is heated in a vacuum by DC to induce a temperature rise, which is determined from the electrical resistance of the sensor. The method consists of two protocols: measurement of a bare sensor before and after deposition of a sample film on its top surface. The thermal conductivity of the sample film is determined by comparing the measured temperature rise with that obtained through numerical analysis. This is based on the principle that the temperature rises of the sensor with and without a deposited film are different because of a difference in in-plane thermal conductance. In this study, measurement of a 20-nm-thick gold film was demonstrated by fabricating two platinum sensors of different widths. The measured thermal conductivities of the platinum sensors and gold film were significantly smaller than those of bulk materials. The relationship between the thermal and electrical conductivities was also discussed..
12. Qin Yi Li, Jin Hui Liu, DONG HAI WANG, Xing Zhang, Koji Takahashi, Optical absorptance measurement of an individual multiwall carbon nanotube using a T type thermal probe method, Review of Scientific Instruments, 84, 104905, 2013.10, [URL], Optical absorptance is an important property of carbon nanotubes for practical applications but has rarely been accurately measured. We developed a T type thermal probe method to measure the optical absorptance of an individual multiwall carbon nanotube. In this method, one end of the carbon nanotube (CNT) is attached to the center of a platinum nanofilm in a T shape and the Pt nanofilm acts as a thermometer. A laser beam irradiates at the CNT and the absorbed laser power can be determined by measuring the average temperature rise of the Pt nanofilm based on the temperature dependence of the electric resistance. Experimental results showed that a 100-nm-diameter multiwall CNT could absorb 13.2% of the 514-nm-wavelength laser power with the laser spot diameter being 1 μm. This method is useful for determining the optical absorptance of CNTs and other one-dimensional nanostructures such as Si/Ge nanowires for various optical wavelengths in their photovoltaic, photoelectrolysis and other optical applications..
13. Jin Hui Liu, DONG HAI WANG, Yu Dong Hu, Wei Gang Ma, Xing Zhang, Laser flash-Raman spectroscopy method for the measurement of the thermal properties of micronano wires, Review of Scientific Instruments, 86, 014901, 2015.01, This paper introduces a new method for measuring the thermal diffusivity and thermal conductivity of individual micro/nano wires using Raman spectroscopy. This method uses a focused short pulsed laser and a continuous-wave laser in a Raman spectroscopy system as the local heater, Raman signal excitation source, and temperature sensor. Unsteady and steady thermal conduction models are used to get two independent equations for the thermal diffusivity (α) and laser absorptivity (η). This new method is verified by comparing experimental results for graphite carbon fiber with measurement using the 3ω method. The method was then used to measure the temperature dependent thermal diffusivity and thermal conductivity of individual carbon nanotubes..
14. Wei Gang Ma, DONG HAI WANG, Xing Zhang, Koji Takahashi, Different effects of grain boundary scattering on charge and heat transport in polycrystalline platinum and gold nanofilms, Chinese Physics B, 18, 5, 2035-2040, 2009.04.
15. Wei Gang Ma, DONG HAI WANG, Xing Zhang, Wei Wang, Experiment study of the size effects on electron-phonon relaxation and electrical resistivity of polycrystalline thin gold films, Journal of Applied Physics, 108, 064308, 2010.10.
16. DONG HAI WANG, Bing Yang Cao, Zeng Yuan Guo, Heat flow choking in carbon nanotubes, International Journal of Heat and Mass Transfer, 53, 9-10, 1796-1800, 2010.10.
17. DONG HAI WANG, Zeng Yuan Guo, Thermon gas as the thermal energy carrier in gas and metals, Chinese Science Bulletin, 55, 29, 3350-3355, 2010.11.
18. Wei Gang Ma, DONG HAI WANG, Xing Zhang, Wei Wang, Study of the electron–phonon relaxation in thin metal films using transient thermoreflectance technique, International Journal of Thermophysics, 10.1007/s10765-011-1063-2, 2011.06.
19. DONG HAI WANG, Jin Hui Liu, Xing Zhang, Zeng Yuan Guo, Koji Takahashi, Experimental study on the influences of grain boundary scattering on the charge and heat transport in gold and platinum nanofilms, Heat and Mass Transfer, 47, 8, 893-898, 2011.10.
20. DONG HAI WANG, Wei Gang Ma, Xing Zhang, Wei Wang, Zeng Yuan Guo, Theoretical and experimental study on the heat transport in metallic nanofilms heated by ultra-short pulsed laser, International Journal of Heat and Mass Transfer, 54, 1, 967-974, 2011.08.
21. DONG HAI WANG, Wei Gang Ma, Zeng Yuan Guo, Xing Zhang, Wei Wang, Measurement of electron-phonon coupling factor and interfacial thermal resistance of metallic nano-films using transient thermoreflectance technique, Chinese Physics B, 20, 040701, 2011.06.
22. DONG HAI WANG, Bing Yang Cao, Zeng Yuan Guo, Non-Fourier heat conduction in carbon nanotubes, Journal of Heat Transfer-ASME, 134, 051004, 2012.06.
23. DONG HAI WANG, Jin Hui Liu, Xing Zhang, Zeng Yuan Guo, Koji Takahashi, Non-Fourier heat conduction study for steady states in metallic nanofilms, Chinese Science Bulletin, 57, 24, 3239-3243, 2012.08.
24. Jin Hui Liu, DONG HAI WANG, Wei Gang Ma, Xing Zhang, Yan Song, Simultaneous measurement of thermal conductivity and thermal contact resistance of individual carbon fibers using Raman spectroscopy, Review of Scientific Instruments, 84, 044901, 2013.12.
25. Ru Fan Zhang, Ying Ying Zhang, Qing Zhang, Huan Huan Xie, DONG HAI WANG, J Q Nie, Q Wen, Fei Wei, Optical visualization of individual ultralong carbon nanotubes by chemical vapour deposition of titanium dioxide nanoparticles, Nature Communications, 4, 1727, 2013.10.
26. DONG HAI WANG, Jin Hui Liu, Xing Zhang, Tian Yi Li, Ru Fan Zhang, Fei Wei, Heat transfer between an individual carbon nanotube and gas environment in a wide Knudsen number regime, Journal of Nanomaterials, 181543, 2013.11.
27. DONG HAI WANG, Jin Hui Liu, Zeng Yuan Guo, Xing Zhang, Ru Fan Zhang, Fei Wei, Tian Yi Li, Thermal transport across the interface between a suspended single-wall carbon nanotube and air, Nanoscale and Microscale Thermophysical Engineering, 17, 349-365, 2013.11.
28. DONG HAI WANG, Jin Hui Liu, Xing Zhang, Koji Takahashi, Breakdown of Wiedemann-Franz law in individual suspended polycrystalline gold nanofilms down to 3 K, International Journal of Heat and Mass Transfer, 66, 585-591, 2013.11.
29. DONG HAI WANG, Jin Hui Liu, Xing Zhang, Yan Song, Raman measurements of optical absorption and heat transfer coefficients of a single carbon fiber in air environment, International Journal of Heat and Mass Transfer, 70, 40-45, 2014.01.
30. DONG HAI WANG, Jin Hui Liu, Xing Zhang, Ru Fan Zhang, Fei Wei, Raman measurement of heat transfer in suspended individual carbon nanotube, Journal of Nanoscience and Nanotechnology, 15, 4, 2939-2943, 2015.04, [URL].