Real time characterization of hydrodynamics in optically trapped networks of micro-particles.
Real time characterization of hydrodynamics in optically trapped networks of micro-particles.
复制标题
光学捕获微粒网络中流体动力学的实时表征。
DOI：
10.1002/jbio.201000003
复制
发表时间：
2010
影响因子：
2.8
通讯作者：
Curran A
中科院分区：
文献类型：
--
作者：
Curran A
The hydrodynamic interactions of micro‐silica spheres trapped in a variety of networks using holographic optical tweezers are measured and characterized in terms of their predicted eigenmodes. The characteristic eigenmodes of the networks are distinguishable within 20–40 seconds of acquisition time. Three different multi‐particle networks are considered; an eight‐particle linear chain, a nine‐particle square grid and, finally, an eight‐particle ring. The eigenmodes and their decay rates are shown to behave as predicted by the Oseen tensor and the Langevin equation, respectively. Finally, we demonstrate the potential of using our micro‐ring as a non‐invasive sensor to the local environmental viscosity, by showing the distortion of the eigenmode spectrum due to the proximity of a planar boundary. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
