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DOI	10.1073/pnas.2107295118
	One-dimensional van der Waals heterostructures: Growth mechanism and handedness correlation revealed by nondestructive TEM
	Zheng Y.; Kumamoto A.; Hisama K.; Otsuka K.; Wickerson G.; Sato Y.; Liu M.; Inoue T.; Chiashi S.; Tang D.-M.; Zhang Q.; Anisimov A.; Kauppinen E.I.; Li Y.; Suenaga K.; Ikuhara Y.; Maruyama S.; Xiang R.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:37
英文摘要	We recently synthesized one-dimensional (1D) van der Waals heterostructures in which different atomic layers (e.g., boron nitride or molybdenum disulfide) seamlessly wrap around a single-walled carbon nanotube (SWCNT) and form a coaxial, crystalized heteronanotube. The growth process of 1D heterostructure is unconventional-different crystals need to nucleate on a highly curved surface and extend nanotubes shell by shell-so understanding the formation mechanism is of fundamental research interest. In this work, we perform a follow-up and comprehensive study on the structural details and formation mechanism of chemical vapor deposition (CVD)-synthesized 1D heterostructures. Edge structures, nucleation sites, and crystal epitaxial relationships are clearly revealed using transmission electron microscopy (TEM). This is achieved by the direct synthesis of heteronanotubes on a CVD-compatible Si/SiO2 TEM grid, which enabled a transfer-free and nondestructive access to many intrinsic structural details. In particular, we have distinguished different-shaped boron nitride nanotube (BNNT) edges, which are confirmed by electron diffraction at the same location to be strictly associated with its own chiral angle and polarity. We also demonstrate the importance of surface cleanness and isolation for the formation of perfect 1D heterostructures. Furthermore, we elucidate the handedness correlation between the SWCNT template and BNNT crystals. This work not only provides an in-depth understanding of this 1D heterostructure material group but also, in a more general perspective, serves as an interesting investigation on crystal growth on highly curved (radius of a couple of nanometers) atomic substrates. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Carbon nanotube; One-dimensional van der Waals heterostructure; Transmission electron microscopy
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238387
作者单位	Department of Mechanical Engineering, The University of Tokyo, Tokyo, 113-8656, Japan; Institute of Engineering Innovation, The University of Tokyo, Tokyo, 113-8656, Japan; Department of Materials Science and Nanoengineering, Rice University, Houston, TX 77005, United States; Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Japan; Department of Applied Physics, Osaka University, Osaka, 565-0871, Japan; World Premier International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, 3050044, Japan; Department of Applied Physics, Aalto University School of Science, Aalto, FI-00076, Finland; Canatu Ltd., Vantaa, SF-01720, Finland; College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China; The Institute of Scientific and Industrial Research, Osaka University, Osaka, 567-0047, Japan
推荐引用方式 GB/T 7714	Zheng Y.,Kumamoto A.,Hisama K.,et al. One-dimensional van der Waals heterostructures: Growth mechanism and handedness correlation revealed by nondestructive TEM[J],2021,118(37).
APA	Zheng Y..,Kumamoto A..,Hisama K..,Otsuka K..,Wickerson G..,...&Xiang R..(2021).One-dimensional van der Waals heterostructures: Growth mechanism and handedness correlation revealed by nondestructive TEM.Proceedings of the National Academy of Sciences of the United States of America,118(37).
MLA	Zheng Y.,et al."One-dimensional van der Waals heterostructures: Growth mechanism and handedness correlation revealed by nondestructive TEM".Proceedings of the National Academy of Sciences of the United States of America 118.37(2021).