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Direct imaging and determination of the crystal structure of six-layered graphdiyne
Abstract
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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Pages 1714-1721
Cite this article:
Li C, Lu X, Han Y, et al. Direct imaging and determination of the crystal structure of six-layered graphdiyne. Nano Research, 2018, 11(3): 1714-1721. https://doi.org/10.1007/s12274-017-1789-7
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