Microscopic flow measurements with optically trapped microprobes.
Microscopic flow measurements with optically trapped microprobes.
复制标题
使用光学捕获微探针进行微观流量测量。
作者：
B. Nemet;M. Cronin
利用光镊测量流体流动中的微米分辨率速度场，作为扫描共聚焦粘度显微镜的扩展。这个演示是通过在振荡激光陷阱中检测光捕获微球的运动来实现的。通过与独立的基于视频的测量进行比较，验证了该技术的有效性，并应用于获得通过微观楔形的二维流动图。由于速度是与捕集器弛豫时间同时测量的，因此该技术不需要依赖于流体的校准，并且与捕集器刚度和粒径无关。
The use of optical tweezers to measure micrometer-resolution velocity fields in fluid flow is demonstrated as an extension of a scanning confocal viscosity microscope. This demonstration is achieved by detection of the motion of an optically trapped microsphere in an oscillating laser trap. The technique is validated by comparison with an independent video-based measurement and applied to obtain a two-dimensional map of the flow past a microscopic wedge. Since the velocity is measured simultaneously with the trap relaxation time, the technique requires no fluid-dependent calibration and is independent of the trap stiffness and the particle size.
影响因子：
56.9
作者：
Unger, MA;Chou, HP;Quake, SR
通讯作者：
Quake, SR