Optical trapping near a charged surface: three-dimensional optical binding of colloids
Optical trapping near a charged surface: three-dimensional optical binding of colloids
复制标题
带电表面附近的光学捕获：胶体的三维光学结合
DOI：
10.1117/12.740964
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发表时间：
2007
影响因子：
--
通讯作者：
P. Gupta
中科院分区：
文献类型：
--
作者：
S. Ahlawat;R. Dasgupta;P. Gupta
我们报道了使用低数值孔径物镜在带电表面(玻璃边界)附近对电荷稳定的胶体粒子进行三维捕获。捕获是由于光学力和静电斥力之间的平衡作用而产生的。还讨论了沿俘获光束观察到的三维胶体团簇和胶体微球的线性阵列及其可能的原因。
We report three-dimensional trapping of charge stabilized colloidal particles near a charged surface (glass boundary), using a low numerical aperture objective. The trapping arises due to balancing action between optical forces and electrostatic repulsions. The observation of 3-d colloidal clusters and a linear array of colloidal microspheres along the trap beam and the possible reasons thereof are also discussed.