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Hydrodynamic trapping
Hydrodynamic trapping in microfluidics can be used to trap very small particles in an aqueous solution for a long period of time in order to isolate particles and observe their behavior.〔Johnson-Chavarria, E.M; Schroeder, C.M.; Tanyeri, M.; A Microfluidic-based Hyrdrodynamic Trap for Single Particles. Journal of Visualized Experiments. 47. 2011.〕
==Microfluidics==
Hydrodynamic trapping is advantageous in microfluidics. Other trapping devices utilize acoustic, electric, magnetic, and optical fields for trapping. This device uses solely hydrodynamic flow. Since it does not utilize acoustic, electric, magnetic, or optical fields, the particles being studied do not need to possess chemical or physical characteristics that cater to these fields. Instead, hydrodynamic trapping is universal and can be used on any particles. Hydrodynamic traps are able to confine small nanoparticles. This is because the hydrodynamic trapping force is closely related to radius of a particle, whereas alternate trapping methods are more closely related to volume of a particle. These traps are stable and they allow for precise control of environmental factors. This means that if a specific nanoparticle in a solution is desired for study, this nanoparticle can be trapped in concentrated sample suspensions. The surrounding medium in the trap can be easily controlled.〔(【引用サイトリンク】url=http://www.scs.illinois.edu/schroeder/research/research.html )〕 In addition to the previously mentioned advantages of using hydrodynamic trapping, hydrodynamic trapping is also a relatively low cost trapping method, and it is very easy to use and analyze. It is also simple and inexpensive to incorporate into existing soft lithography based microfluidic systems.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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