Diamond particles have many interesting properties and possible applications. However, producing diamond particles with well-defined shapes on a large scale is challenging because diamonds are chemically inert and extremely hard. Here, we show that air oxidation, a routine method for purifying diamonds, can be used to precisely shape diamond particles at scale. By exploiting the distinct reactivities of different crystal facets and defects inside the diamond, layer-by-layer outward-to-inward and inward-to-outward oxidation produced diverse diamond shapes including spheres, twisted surfaces, pyramidal islands, inverted pyramids, nanoflowers, and porous polygons. The nanosculpted diamonds had more and finer features that enabled them to outperform the original raw diamonds in various applications. Using experimental observations and Monte Carlo simulations, we built a shape library that guides the design and fabrication of diamond particles with well-defined features that could be critical for anticounterfeiting, optical, and other practical applications. Our study presents a simple, economical, and scalable way to produce shape-customized diamonds for various potential technologies.

中文翻译：

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通过可编程纳米雕刻对金刚石颗粒进行可扩展的重塑


金刚石颗粒具有许多有趣的特性和可能的应用。然而，大规模生产具有明确形状的金刚石颗粒具有挑战性，因为金刚石具有化学惰性且非常坚硬。在这里，我们展示了空气氧化是一种净化钻石的常规方法，可用于大规模精确塑造钻石颗粒。通过利用钻石内部不同晶体刻面和缺陷的不同反应性，逐层向外和向内向外氧化产生了不同的钻石形状，包括球形、扭曲表面、金字塔状岛、倒金字塔形、纳米花和多孔多边形。纳米雕刻的钻石具有更多、更精细的特征，使它们能够在各种应用中超越原始钻石原石。利用实验观察和蒙特卡洛模拟，我们构建了一个形状库，指导设计和制造具有明确特征的金刚石颗粒，这些特征对于防伪、光学和其他实际应用至关重要。我们的研究提出了一种简单、经济且可扩展的方法来生产适合各种潜在技术的形状定制钻石。