Volodin A, Ahlskog M, Seynaeve E, Fonseca A, Nagy JB
Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium.
Phys Rev Lett. 2000 Apr 10;84(15):3342-5. doi: 10.1103/PhysRevLett.84.3342.
Coiled carbon nanotubes were produced catalytically by thermal decomposition of hydrocarbon gas. After deposition on a silicon substrate, the three-dimensional structure of the helix-shaped multiwalled nanotubes can be visualized with atomic force microscopy. Helical structures of both chiralities are present in the nanotube deposits. For larger coil diameters ( >170 nm), force modulation microscopy allows one to probe the local elasticity along the length of the coil. Our results agree with the classical theory of elasticity. Similar to the case of straight nanotubes, the Young modulus of coiled multiwalled nanotubes remains comparable to the very high Young modulus of hexagonal graphene sheets.
通过烃类气体的热分解催化制备了螺旋状碳纳米管。沉积在硅衬底上后，可用原子力显微镜观察螺旋状多壁纳米管的三维结构。纳米管沉积物中存在两种手性的螺旋结构。对于较大的螺旋直径（>170 nm），力调制显微镜可用于探测沿螺旋长度方向的局部弹性。我们的结果与经典弹性理论相符。与直纳米管的情况类似，螺旋状多壁纳米管的杨氏模量仍然与六边形石墨烯片非常高的杨氏模量相当。
