纳米金刚石
材料科学
纳米技术
钻石
纳米
纳米颗粒
化学气相沉积
碳化物
起爆
机械化学
产量(工程)
化学工程
化学
爆炸物
复合材料
有机化学
工程类
作者
Tengteng Lyu,Cynthia M Archambault,Evan Hathaway,Xiangyu Zhu,Carol King,Lama Abu-Amara,Sicheng Wang,Martin Kunz,Moon J. Kim,Jingbiao Cui,Yansun Yao,Tony Yu,T. Officer,Man Xu,Yanbin Wang,Hao Yan
出处
期刊:Small
[Wiley]
日期:2023-04-18
卷期号:19 (33)
被引量:1
标识
DOI:10.1002/smll.202300659
摘要
Abstract Controlling diamond structures with nanometer precision is fundamentally challenging owing to their extreme and far‐from‐equilibrium synthetic conditions. State‐of‐the‐art techniques, including detonation, chemical vapor deposition, mechanical grinding, and high‐pressure‐high‐temperature synthesis, yield nanodiamond particles with a broad distribution of sizes. Despite many efforts, the direct synthesis of nanodiamonds with precisely controlled diameters remains elusive. Here the geochemistry‐inspired synthesis of sub‐5 nm nanodiamonds with sub‐nanometer size deviation is described. High‐pressure‐high‐temperature treatment of uniform iron carbide nanoparticles embedded in iron oxide matrices yields nanodiamonds with tunable diameters down to 2.13 and 0.22 nm standard deviation. A self‐limiting, redox‐driven, and diffusion‐controlled solid‐state reaction mechanism is proposed and supported by in situ X‐ray diffraction, ex situ characterizations, and computational modeling. This work provides a unique mechanism for the precise control of nanostructured diamonds under extreme conditions and paves the road for the full realization of their potential in emerging technologies.
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