Department of Materials and Interfaces, Weizmann Institute of Science , Rehovot 76100, Israel.
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
Nano Lett. 2017 Jan 11;17(1):28-35. doi: 10.1021/acs.nanolett.6b03012. Epub 2016 Dec 29.
We study for the first time the resonant torsional behaviors of inorganic nanotubes, specifically tungsten disulfide (WS) and boron nitride (BN) nanotubes, and compare them to that of carbon nanotubes. We have found WS nanotubes to have the highest quality factor (Q) and torsional resonance frequency, followed by BN nanotubes and carbon nanotubes. Dynamic and static torsional spring constants of the various nanotubes were found to be different, especially in the case of WS, possibly due to a velocity-dependent intershell friction. These results indicate that inorganic nanotubes are promising building blocks for high-Q nanoelectromechanical systems (NEMS).
我们首次研究了无机纳米管的共振扭转行为，特别是二硫化钨（WS）和氮化硼（BN）纳米管，并将其与碳纳米管进行了比较。我们发现 WS 纳米管具有最高的品质因数（Q）和扭转共振频率，其次是 BN 纳米管和碳纳米管。各种纳米管的动态和静态扭转弹簧常数不同，特别是在 WS 的情况下，可能是由于速度相关的壳间摩擦。这些结果表明，无机纳米管是高 Q 值的纳米机电系统（NEMS）的有前途的构建模块。
