Electronic Structure of Graphdiyne Probed by X-ray Absorption Spectroscopy and Scanning Transmission X-ray Microscopy
Electronic Structure of Graphdiyne Probed by X-ray Absorption Spectroscopy and Scanning Transmission X-ray Microscopy
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DOI：
10.1021/jp310013z
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发表时间：
2013-03
影响因子：
3.7
通讯作者：
J. Zhong;Jian Wang;Jigang Zhou;B. Mao;Changhai Liu;Hui-Biao Liu;Yuliang Li;T. Sham;Xuhui Sun
中科院分区：
文献类型：
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作者：
J. Zhong;Jian Wang;Jigang Zhou;B. Mao;Changhai Liu;Hui-Biao Liu;Yuliang Li;T. Sham;Xuhui Sun
利用X射线吸收光谱和扫描透射X射线显微镜研究了石墨二炔在空气中的电子结构。发现石墨二炔在空气中放置3个月后，缺陷处的碳-碳三键已转变为双键。实验结果揭示了氧和氮官能团的存在，并表明氧化发生在整个老化石墨二炔，而氮污染主要是在其表面上。观察到老化石墨二炔的屈曲，这是由于三键的打开而引起的键长变化。还表明，在高温如800 °C下退火可以除去老化石墨二炔中的大部分官能团。
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–carbon 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 °C may remove most of the functional groups in the aged graphdiyne.