@article{Li2018, 
author = {Chao Li and Xiuli Lu and Yingying Han and Shangfeng Tang and Yi Ding and Ruirui Liu and Haihong Bao and Yuliang Li and Jun Luo and Tongbu Lu},
title = {Direct imaging and determination of the crystal structure of six-layered graphdiyne},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {3},
pages = {1714-1721},
keywords = {few-layer graphdiyne, crystal structure, low-voltage transmission electron microscopy},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1789-7},
doi = {10.1007/s12274-017-1789-7},
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.}
}