凯发_Minlin Zhong

Speaker-Minlin Zhong

Minlin Zhong
Tsinghua University, China

Minlin Zhong is currently a professor at the School of Materials Science and Engineering of Tsinghua University. He has accumulated over 30 years of experience in the laser materials processing research field. His research interest covers areas including laser micro-nano fabrication, laser surface engineering, laser 3D printing, materials processing by lasers and novel materials development based on laser technology. He has been the project leader for 19 international cooperation projects granted by British Royal Academy of Engineering, Sino-Germany Scientific Center, French Government and from recognized world-level companies like GE, GM, Boeing, Royce Rolls and Mitrubish, in addition to numerous domestic scientific projects including China National Key Basic Research and Development Program, NSFC major international cooperation project, NSFC key project, and industrial cooperation projects. More than 260 peer-reviewed journal articles and international conference papers, 14 patents and 4 books have arisen from his research work.

Dr. Zhong is a senior editor of Journal of Laser Applications, Journal of Chinese Lasers. He is an editorial board member of the Journal Light: Science and Applications partnered with Nature Publication Group. He has co-organized 8 China National Conference on Laser Materials Processing. He has been the program committee member, session-chair, conference co-chair for many important international conferences organized by LIA and SPIE. He was the general conference chair of the third Pacific International Conference on Applications of Laser and Optics-PICALO 2008 and the co-chair of the “International Conference on Laser Processes and Components” in Laser-World of Photonics China in 2006/2007/2009/2010/2011/12.

Dr. Zhong was elected a Fellow of Laser Institute of America (LIA) in 2010. He was a LIA board member at 2005-2007 and 2012-2013. He is the vice president of International Academy of Photonics and Laser Engineering-IAPLE. In addition, he was a Senior Member of the Optical Society of China (2002-), a Board Member of the Beijing Optical Society, a member of the 12th Panel Group of the National Natural Science Foundation of China (NSFC), and a guest Professor of the National Laboratory on Power Beam Processing.

Title：Laser Rapid Fabrication of Large-area and Patterned Graphene: An Engineering Approach to Nano-materials

Symposium Low-Cost, Large-Scale Manufacture Technology of Graphene

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Abstract

Graphene has attracted a tremendous amount of attention and research focus since it was successfully exfoliated from highly oriented pyrolytic graphite (HOPG) in 2004. The exceptional properties of graphene, such as ultra-high electrical conductivity, excellent thermal stability, and outstanding mechanical properties make it a promising material for many potential applications, including next generation ultra-compact computers, flat screen displays, sensors, solar cells, conducting plastics or ceramics, micro-electro-mechanical devices and novel protection coatings. Numerous synthesizing approaches have been developed to growth good quality graphene with specific advantages and disadvantages. It is strategically important and great need to explore a comprehensive approach, which integrates several merits including large-area growth, patterned growth and fast growth of graphene for practical applications.

In this work, we report an engineering approach to grow graphene via high power laser rapidly for large area or for designable pattern. The high power and continuous-wave diode laser and fiber laser were employed to irradiate solid carbon source coated on nickel substrate surfaces in ambient condition. Graphene was synthesized by carbon dissolution into the substrate during rapid laser heating and then precipitated onto surface during rapid cooling. The graphene growth rate by this laser approach can reach up to 28.8 cm2/min. Large area graphene was fabricated by a rectangular diode laser beam via a single pass. Any designable pattern of graphene can be available by a focused fiber laser beam. In addition to the above merits, the solid carbon source is less hazardous compared to typical gaseous carbon sources used in CVD. The influence of laser and process parameters on the graphene formation and quality was investigated systematically. Raman analyses, optical images and scanning electron microscopy (SEM) results indicate that the quality of graphene strongly depends on the laser process parameters, including laser power density and scanning rate. These parameters have been optimized to control the heat input and then the quality of graphene. The penetration and precipitation mechanism of carbon into Ni substrate during the fabrication process were also discussed. The corrosion resistance of this laser grown graphene in various condition was performed and compared to CVD grown graphene. This approach show good potential for applications.