Electronic Structure of Graphdiyne Probed by X-ray Absorption Spectroscopy and Scanning Transmission X-ray Microscopy
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- 作者：Jun Zhong ; Jian Wang ; Ji-Gang Zhou ; Bao-Hua Mao ; Chang-Hai Liu ; Hui-Biao Liu ; Yu-Liang Li ; Tsun-Kong Sham ; Xu-Hui Sun ; Sui-Dong Wang
- 刊名：The Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：March 21, 2013
- 年：2013
- 卷：117
- 期：11
- 页码：5931-5936
- 全文大小：339K
- 年卷期：v.117,no.11(March 21, 2013)
- ISSN：1932-7455
文摘
The electronic structure of graphdiyne exposed to air is investigated utilizing X-ray absorption spectroscopy and scanning transmission X-ray microscopy. It is found that carbon鈥揷arbon triple bonds at defect sites in graphdiyne have been changed to double bonds after 3 months in air. The experimental results reveal the existence of oxygen and nitrogen functional groups and indicate that the oxidation takes place throughout the aged graphdiyne while the nitrogen contamination is mainly on its surface. Buckling of the aged graphdiyne is observed, resulting from bond length change due to the opening of triple bonds. It is also shown that annealing at a high temperature such as 800 掳C may remove most of the functional groups in the aged graphdiyne.