对晶体钻石的合成
Hu Tang1, Xiaohong Yuan1, Yong Cheng2
1Center for High Pressure Science and Technology Advanced Research, Beijing, China.
Nature
|November 25, 2021
概括
研究人员发现了钻石的新型晶体状态,与晶体或无形形式不同. 这种新的钻石材料在高压下合成, 弥合了有序和无序固体之间的差距.
科学领域:
- 材料科学
- 固态物理
- 纳米技术
背景情况:
- 固体被分为晶体 (远程顺序) 或非晶体 (无形).
- 这些状态之间的区别变得具有挑战性,因为晶体的远程顺序减少了.
- 在完全晶体和无形状态之间理解结构存在一个基本的差距.
研究的目的:
- 报告发现了一种新型的半晶体钻石.
- 描述这个半晶体钻石的独特结构性质.
- 研究这种新材料的形成机制和潜在应用.
主要方法:
- 在高压,高温条件下从面中心立方C60合成准晶体钻石 (30GPa,1600K).
- 使用X射线衍射和高分辨率传输电子显微镜进行结构性表征.
- 通过先进的分子动力学模拟来分析结构性质和形成机制.
主要成果:
- 具有中距离顺序的亚纳米晶体特征的准晶体钻石状态的识别.
- 与晶体和无形钻石相比,具有独特的结构性质.
- 在压缩的C60和sp3结合中涉及核化位点的形成机制的阐释.
结论:
- 在碳家族中发现了一种具有独特特性的新型钻石.
- 这一发现代表了无形和晶体结构之间的关键联系,扩大了我们对物质状态的理解.
- 准晶体钻石有潜力开发新的先进材料.
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