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2016年11月10日下午同济大学陈杰研究员学术报告

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化学工程与技术学科系列学术报告会第八讲

 

报告题目:Graphene Based High——Performance Thermal Interface Materials

报告人:陈杰 研究员

主持人:吕树申 教授、副院长

报告地点:中山大学珠海校区教学楼E403

报告时间:1110日(星期四) 14:00~15:00

报告人简介:陈杰,国家“青年千人计划”专家、同济大学“领航计划”特聘研究员、物理科学与工程学院博士生导师。陈杰博士于2005年获南京大学学士学位,2007年获南京大学硕士学位,2011年获新加坡国立大学博士学位。他曾获国家优秀自费留学生奖(2010),新加坡国立大学优秀博士论文奖(2012),瑞士苏黎世联邦理工学院 ETH Fellow (2013-2015)。在获第六批中组部“青年千人计划”(2015)后,他加盟同济大学声子学与热能科学中心。他的研究主要集中在纳米尺度热传导,热电材料以及热界面材料,在Nano Letters, Advanced Materials, and Advanced Functional Materials等高水平杂志上发表论文20多篇,目前的H-index13

摘要:

The increasing power density and the decreasing dimensions of transistors present severe thermal challenges to the design of modern microprocessors. Furthermore, new technologies such as three‐dimensional chip stack architectures require novel cooling solutions for their thermal management. To address these problems, thermal properties of graphene and carbon nanotube have been subjects of intensive investigations. However, the large contact thermal resistance of CNTs and the low c-axis thermal conductivity in few‐layer graphene (FLG) present major roadblocks for their applications as thermal interface materials (TIMs). In this talk, I will present our recent progress on developing graphene based high-performance TIMs. By applying mechanical strain that can tailor the phonon spectrum, we demonstrate that the inter­layer thermal resistance in FLG can be reduced by 85%. Furthermore, we show that by replacing the inter‐layer van der Waals interaction with the covalent sp2 bond with the CNT, the graphene-CNT (G-CNT) hybrid outperforms FLG by more than 2 orders of magnitude for the c­axis heat transfer, while its thermal resistance is 3 orders of magnitude lower than the state‐of-the-art TIMs. When immersed in water, the G-CNT hybrid can provide sustainable cooling of high temperature and high heat flux hot surfaces via the solid‐liquid interaction. Approaches to regulate the heat transfer across solid‐liquid interface will also be discussed.

 

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