六角化在钻石 (111) 和其终端表面上的核化机制:DFT研究
Hang Xu1, Jiping Hu1, Fang Wang1,2,3,4
1National Center for International Joint Research of Electronic Materials and Systems, International Joint-Laboratory of Electronic Materials and Systems of Henan Province, College of Electrical and Information Engineering, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|August 27, 2024
概括
通过控制核化通路,对钻石的六角化 (h-BN) 增长得到了优化. 化处理促进了h-BN核化,并影响了h-BN/钻石异构的特性.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 计算化学的计算化学
背景情况:
- 六角化 (h-BN) 具有特殊的特性,使其成为一个非常有趣的材料.
- 由于其热和电特性,钻石是h-BN生长的有希望的基质.
研究的目的:
- 为了研究h-BN在钻石上的核化机制 (111).
- 了解化对h-BN核和生长的影响.
- 为了探索h-BN/钻石异构结构的形成.
主要方法:
- 基于密度函数理论 (DFT) 的第一原则计算.
- 吸附,扩散和核形成形态的分析.
- 核化路径的预测.
主要成果:
- 通过特定的N和B原子相对于钻石基质的位置来增强BN集群稳定性.
- 在BN集群生长过程中,从链状结构转变为蜂结构的几何转变发生.
- 化处理降低了结合亲和力,增强了扩散,并促进了h-BN核化.
- 终结钻石作为电子捐赠体,影响h-BN形态和异构特性.
结论:
- 控制BN集群几何学,特别是避免齐克扎克链,对于提高清洁钻石h-BN核化速率至关重要.
- 化是促进h-BN核和钻石生长的有效策略.
- 这些发现为优化h-BN增长和构建h-BN/钻石异构结构提供了理论基础.
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