Method for trapping and manipulating nanoscale objects in solution

doi:10.1063/1.1872220

2005-02-25

244

PRE

Adam E. Cohen *

W. E. Moerner

DOI：10.1063/1.1872220

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摘要

En 中文

We present a device that allows a user to trap a single nanoscale object in solution at ambient temperature, and then to position the trapped object with nanoscale resolution. This anti-Brownian electrophoretic trap (ABEL trap) works by monitoring the Brownian motion of the particle (via fluorescence microscopy), and then applying a feedback voltage to the solution so that the electrophoretic drift exactly cancels the Brownian motion. The ABEL trap works on any object that can be imaged optically and that acquires a charge in water. The ABEL trap is noninvasive, is gentle enough to handle biological molecules, and can trap objects far smaller than can be trapped with laser tweezers. Our proof-of-principle device can trap fluorescent polystyrene nanospheres with diameters down to 20 nm. (C) 2005 American Institute of Physics.

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期刊

Applied Physics Letters

IF:

3.6

论文数:

10.4W

被引数:

17.8W

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