报告摘要：We present the experimental synthesis of one-dimensional (1D) van der Waals heterostructures, a class of materials where different atomic layers are coaxially stacked.[1] A typical structure is a 5-nanometer–diameter heteronanotube consisting of an inner SWCNT, a middle three-layer BN nanotube (BNNT), and an outer MoS₂ nanotube (MoS₂NT). Electron diffraction verifies that all shells in this structure are single crystals. This work suggests that all the materials in the current 2D library could be rolled into their 1D counterparts and a plethora of function-designable 1D heterostructures may be realized. We also present our follow-up study on the structural details and formation mechanism of 1D heterostructures.[2] Edge structures, nucleation sites, crystal epitaxial relationships are clearly revealed using a nondestructive transmission electron microscopy.[3] Later, we summarize the current understanding on the properties of 1D heterostructures [4,5,6]. Lastly, we will present our recent progress and perspective on more sophisticated 1D heterostructures.[7].

主讲人介绍：项荣，浙江大学长聘正教授、求是特聘教授，国家级人才。本科毕业于中国科学技术大学，硕士毕业于清华大学，博士毕业于日本东京大学。曾在日本东京大学任职，历任博士后、助理教授、长聘副教授。主要从事微纳、原子尺度材料的制造、表征及应用研究。发表SCI论文140余篇，刊登于Science，Science Adv，PNAS, JACS, ACS Nano, Adv Mater等期刊。国际首创了一维范德华异质结，工作被Science、Nature Electronics等多家媒体报道。承担日本学术振兴机构JSPS、日本技术振兴机构JST，中国科技部、基金委、教育部等各级课题30余项。获日本文部科学大臣表彰、日本文部省纳米技术平台年度优秀成果奖、中国留日同学会功劳赏等奖励。