论文标题
发现碳基最强和最坚硬的无定形材料
Discovery of carbon-based strongest and hardest amorphous material
论文作者
论文摘要
碳可能是元素周期表中最引人入胜的元素，因为它的同素异形物的多样性是由于其可变（SP，SP2和SP3）键合图案所致。探索新形式的碳一直是当代科学研究的永恒主题。在这里，我们报告了新型的无定形碳相，这些碳阶段包含高分子在将富勒烯C60压缩到先前未开发的高压和温度后回收的SP3键合子。合成的碳是迄今为止已知的最坚硬，最坚固的无定形材料，能够刮擦钻石晶体并接近其强度，这可以通过免费的机械测试证明。材料的光致发光和吸收光谱表明它们是具有可调带盖在1.5-2.2 eV范围内的半导体，与无定形硅相当。出色的机械性能和电子特性的显着组合使这类无定形碳是光伏应用的绝佳候选者，要求超高强度和耐磨性。
Carbon is likely the most fascinating element of the periodic table because of the diversity of its allotropes stemming from its variable (sp, sp2, and sp3) bonding motifs. Exploration of new forms of carbon has been an eternal theme of contemporary scientific research. Here we report on novel amorphous carbon phases containing high fraction of sp3 bonded atoms recovered after compressing fullerene C60 to previously unexplored high pressure and temperature. The synthesized carbons are the hardest and strongest amorphous materials known to date, capable of scratching diamond crystal and approaching its strength which is evidenced by complimentary mechanical tests. Photoluminescence and absorption spectra of the materials demonstrate they are semiconductors with tunable bandgaps in the range of 1.5-2.2 eV, comparable to that of amorphous silicon. A remarkable combination of the outstanding mechanical and electronic properties makes this class of amorphous carbons an excellent candidate for photovoltaic applications demanding ultrahigh strength and wear resistance.
