Sun L, Banhart F, Krasheninnikov A V, Rodríguez-Manzo J A, Terrones M, Ajayan P M
Institut für Physikalische Chemie, Universität Mainz, 55099 Mainz, Germany.
Science. 2006 May 26;312(5777):1199-202. doi: 10.1126/science.1124594.
Closed-shell carbon nanostructures, such as carbon onions, have been shown to act as self-contracting high-pressure cells under electron irradiation. We report that controlled irradiation of multiwalled carbon nanotubes can cause large pressure buildup within the nanotube cores that can plastically deform, extrude, and break solid materials that are encapsulated inside the core. We further showed by atomistic simulations that the internal pressure inside nanotubes can reach values higher than 40 gigapascals. Nanotubes can thus be used as robust nanoscale jigs for extruding and deforming hard nanomaterials and for modifying their properties, as well as templates for the study of individual nanometer-sized crystals under high pressure.
闭壳层碳纳米结构，如碳洋葱，已被证明在电子辐照下可作为自收缩高压单元。我们报告称，对多壁碳纳米管进行可控辐照会在纳米管芯内导致大量压力积聚，这会使封装在芯内的固体材料发生塑性变形、挤出并破碎。我们通过原子模拟进一步表明，纳米管内部压力可达到高于40吉帕斯卡的值。因此，纳米管可用作强大的纳米级夹具，用于挤压和使硬纳米材料变形以及改变其性能，还可作为在高压下研究单个纳米尺寸晶体的模板。
