期刊
NANO RESEARCH
卷 11, 期 3, 页码 1714-1721出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1789-7
关键词
few-layer graphdiyne; crystal structure; low-voltage transmission electron microscopy
类别
资金
- National Natural Science Foundation of China [11604241, 21790052, 21331007]
- National Program for Thousand Young Talents of China
- Postdoctoral Science Foundation of China [2015M580209]
- Tianjin Municipal Education Commission
- Tianjin Municipal Science and Technology Commission [15JCYBJC52600]
- Tianjin University of Technology
Since its discovery, the direct imaging and determination of the crystal structure of few-layer graphdiyne has proven difficult because it is too delicate under irradiation by an electron beam. In this work, the crystal structure of a six-layered graphdiyne nanosheet was directly observed by low-voltage transmission electron microscopy (TEM) using low current density. The combined use of high-resolution TEM (HRTEM) simulation, electron energy-loss spectroscopy, and electron diffraction revealed that the as-synthesized nanosheet was crystalline graphdiyne with a thickness of 2.19 nm (corresponding to a thickness of six layers) and showed ABC stacking. Thus, this work provides direct evidence for the existence and crystal structure of few-layer graphdiyne, which is a new type of two-dimensional carbon material complementary to graphene.
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