News Release

认为钻石不会弯曲吗?请三思

Peer-Reviewed Publication

American Association for the Advancement of Science (AAAS)

Think Diamonds Are Unyielding? Think Again (1 of 1)

image: A GIF of the thin, flexible diamonds that Banerjee <i>et al</i>. created. This material relates to a paper that appeared in the 20 April 2018 issue of <i>Science</i>, published by AAAS. The paper, by A. Banerjee at City University of Hong Kong in Hong Kong, China, and colleagues was titled, "Ultralarge elastic deformation of nanoscale diamond." view more 

Credit: Carla Schaffer / AAAS

研究人员发现了一种方法,它能令自然界最硬物质具有柔性:让纳米尺度的钻石“针”能够弯曲。这一开发对生物成像和生物传感、光机械装置、超强度纳米结构等都具有意义。除了有令人一见倾心的晶莹闪烁之美,钻石也有广泛的应用,因为它们有着非凡的硬度和耐用度。然而,让钻石变形的任何尝试通常都会致其脆裂。Amit Banerjee和同事在此发现了一种方法,它能令这一出了名的强硬材料做一点让步。他们将人造钻石薄膜材料蚀刻成细小的、长度仅300纳米的钻石针。对这些钻石薄片进行捅戳后显示,它们能承受高达9%的应力,这已经接近钻石柔韧性的理论上限。作者报告,单晶钻石纳米针通常会比多晶钻石纳米针达到更加高得多的局部最大拉伸应力。Javier LLorca在相关的《视角》中提供了更多的背景资料,他指出:“探索极大弹性应变(高达10%)对结晶固体属性的影响或能发现其新的或意外的行为。”

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注:本文在禁止提前报道指令解除后可供免费阅读:http://www.sciencemag.org


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