多层γ-石墨烯的可扩展合成和表征,具有小直径带间隙的新碳晶体
Victor G Desyatkin1, William B Martin1, Ali E Aliev2
1Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, Ohio 44106, United States.
Journal of the American Chemical Society
|September 21, 2022
概括
研究人员使用结晶辅助聚合物合成了多层玛石墨烯,一种新型的碳基. 这一突破为可扩展的石墨烯材料和相关碳结构开辟了道路.
科学领域:
- 材料科学
- 纳米技术
- 固态化学
背景情况:
- γ-Graphyne是一种对称的碳同位素,具有独特的sp2/sp1杂交.
- 在材料科学中,合成大量的g-graphyne一直是一个重大挑战.
研究的目的:
- 报告第一个成功合成的多层g-graphyne.
- 描述这种新碳相的结构性,电子性和热性.
主要方法:
- 结晶辅助的不可逆交联聚合.
- 协同射粉X射线衍射,电子衍射,显微镜,拉曼,红外光谱和循环电压测量用于表征.
主要成果:
- 成功合成了多层的γ-graphyne,六边轴间距为6.88 Å,层间距为3.48 Å.
- 具有0.48 eV带隙半导体的特征,具有非周期性板叠.
- 在高达240°C的温度下具有可证明的热稳定性.
结论:
- γ-Graphyne可以通过可扩展,动力控制的聚合方法来合成.
- 这种方法可以在不依赖于可逆性的情况下创建周期性共价格网.
- 该方法为合成其他石墨烯家族异型物提供了一条途径.
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