| abstract |
The invention discloses a droplet manipulation chip based on an optofluidic thermocapillary microfluidic vortex and a droplet manipulation method thereof. The droplet manipulation chip includes: a substrate; a microfluidic channel, arranged in the substrate, for accommodating two kinds of incompatible liquids; a photothermal waveguide, movably arranged on the substrate, including an optical signal input end and excitation end, the optical signal input end is used for connecting to an optical signal, and the excitation end is used to excite and form a bipolar optofluidic thermocapillary microfluidic vortex in one of the liquids in the microfluidic channel. The microfluidic chip has the advantages of simple structure, simple and easy fabrication method and low cost, and can be used for fusing, capturing and releasing pico-microliter droplets in immiscible carrier oil and selective encapsulation of micron objects, and the droplet manipulation method has high performance. The convenience and feasibility are low, the external conditions are low, the sample pollution is small, and it has high adjustable characteristics. |