Nanomachines: methods to induce a directed motion at nanoscale.
Nanomachines: methods to induce a directed motion at nanoscale.
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纳米机器：诱导纳米级定向运动的方法。
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
V. Popov
中科院分区：
文献类型：
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作者：
V. Popov
讨论了弱阻尼周期势下物体的运动。研究表明，在存在外部周期性力的情况下，粒子的自发定向运动是可能的，其速度由周期性作用的频率和势的空间周期明确定义。以精确控制的速度诱导定向运动的原理可用于开发（i）处理晶体表面上的单个分子或分子簇的方法； (ii) “纳米机器”——不仅在没有外力的情况下而且在与运动方向相反的力的作用下能够自发运动的物体（从而能够携带其他粒子）； (iii) 提供精确控制运动速度的驱动器； (iv) 通过以指定方式对摩擦表面进行轮廓分析并施加超声波激励而构建的可控摩擦系统。平均系统速度对平均施加力的依赖性显示出在零速度下具有恒定速度的平台，并且在存在周期性外部扰动的情况下具有一组等距离散速度。开发完全控制的纳米机器的问题可以表述为控制平台的宽度和位置的问题。
The motion of bodies in a periodic potential with weak damping is discussed. A spontaneous directed motion of particles is shown to be possible in the presence of external periodic forces at a velocity unambiguously defined by the frequency of the periodic action and the spatial period of the potential. The principle of inducing the directed motion at a precisely controlled velocity can be used to develop (i) means of handling individual molecules or molecular clusters on crystalline surfaces; (ii) "nanomachines"-objects capable of spontaneous motion not only in the absence of an external force but also under the action of a force opposite to the direction of motion (and thereby capable of carrying other particles); (iii) drives providing precisely controlled velocity of motion; (iv) controllable tribological systems constructed by profiling friction surfaces in a specified manner and applying an ultrasonic excitation. The dependence of the average system velocity on the average applied force is shown to have plateaus of constant velocity at zero velocity and a set of equidistant discrete velocities in the presence of periodic external perturbations. The problem of developing fully controlled nanomachines can be formulated as the problem of controlling the width and position of the plateaus.
影响因子：
56.9
作者：
Astumian, RD
通讯作者：
Astumian, RD