Control of nanoparticles with arbitrary two-dimensional force fields
Control of nanoparticles with arbitrary two-dimensional force fields
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DOI：
10.1103/physrevlett.94.118102
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发表时间：
2005-03-25
影响因子：
8.6
通讯作者：
Cohen, AE
中科院分区：
文献类型：
--
作者：
Cohen, AE
一个反布朗电泳陷阱是用来创建任意的二维力场为解决方案中的单个纳米级对象。该陷阱将荧光显微镜与数字粒子跟踪和实时反馈相结合，以在单个纳米粒子上产生位置依赖的电泳力。力可以在纳米距离和毫秒时间内变化，并且不需要是电势的梯度。作为这种技术的例证，我研究布朗运动的谐波，幂律，和双阱势。
An anti-Brownian electrophoretic trap is used to create arbitrary two-dimensional force fields for individual nanoscale objects in solution. The trap couples fluorescence microscopy with digital particle tracking and real-time feedback to generate a position-dependent electrophoretic force on a single nanoparticle. The force may vary over nanometer distances and millisecond times and need not be the gradient of a potential. As illustrations of this technique, I study Brownian motion in harmonic, power-law, and double-well potentials.