Microfluidics for optical sorting of micro and nano particles

Xiaoyun Sima; Kota Taniuchi; Takasi Nisisako; Satoru Shoji

doi:10.1117/12.3002052

13 March 2024 Microfluidics for optical sorting of micro and nano particles

Xiaoyun Sima, Kota Taniuchi, Takasi Nisisako, Satoru Shoji

Proceedings Volume PC12837, Microfluidics, BioMEMS, and Medical Microsystems XXII; PC1283706 (2024) https://doi.org/10.1117/12.3002052
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

We present a microfluidic method for sorting micro/nano particles by optical radiation pressure. First, we create a narrow particle train in the middle of a microfluidic channel by laminar flow of micro/nano particles aqueous suspension. Then, we launch laser light from the side of the channel orthogonal to the flow. The particles experience optical scattering force and deviate the flowing position from the original train. The end of the channel splits into two branches. Depending on the shape, size, or color, only the particles experiencing strong optical force travel into the one of the exit branches, and the rest flows into another. To enhance the accuracy and resolution of particle sorting, we use parabolic fluid flow speed gradient in the channel.

Conference Presentation

Citation Download Citation

Xiaoyun Sima, Kota Taniuchi, Takasi Nisisako, and Satoru Shoji "Microfluidics for optical sorting of micro and nano particles", Proc. SPIE PC12837, Microfluidics, BioMEMS, and Medical Microsystems XXII, PC1283706 (13 March 2024); https://doi.org/10.1117/12.3002052

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