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同济大学声子学与热能科学中心陈杰研究员与瑞士苏黎世联邦理工学院(ETH)Koumoutsakos教授研究小组合作,提出了一种显著提高石墨烯层间导热性能的新方法:用sp~2共价键(强相互作用)来代替石墨烯层间范德华力(弱相互作用),构造无缝连接的石墨烯-碳纳米管混合结构。通过计算机模拟,该团队发现相比于范德华相互作用,共价键连接极大地提高了石墨烯中的晶格振动模式(声子)在垂直方向的传输系数,使得该混合结构沿垂直方向的热导率比相
Chen Jie, Ph.D., Center for Phonology and Thermal Science, Tongji University, has collaborated with Professor Koumoutsakos of ETH (Switzerland) to propose a new method for significantly improving the thermal conductivity between layers of graphene: (Strong interaction) to replace the van der Waals forces between graphene layers (weak interaction), to construct a seamlessly connected graphene-carbon nanotube hybrid structure. Through computer simulations, the team found that covalently bonded connections dramatically increase the vertical transfer coefficient of lattice vibration modes (phonons) in graphene compared to van der Waals interactions so that the heat of the hybrid structure in the vertical direction Conductivity than phase