Opto-thermoelectric speckle tweezers for large-scale trapping and filtration of particles

Abhay Kotnala; Pavana Siddhartha Kollipara; Yuebing Zheng

doi:10.1117/12.2567825

20 August 2020 Opto-thermoelectric speckle tweezers for large-scale trapping and filtration of particles

Abhay Kotnala, Pavana Siddhartha Kollipara, Yuebing Zheng

Proceedings Volume 11463, Optical Trapping and Optical Micromanipulation XVII; 114631B (2020) https://doi.org/10.1117/12.2567825
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

We present opto-thermoelectric speckle tweezers (OTEST) for large-scale and high-throughput trapping of particles. OTEST combine optical speckle with plasmonic substrate to generate a thermal speckle field that consists of many random thermal hotspots to trap a large number of particles using thermoelectric forces. We demonstrate trapping of dielectric and metallic particles with sizes as small as 100 nm in the speckle field. Finally, we integrate OTEST with microfluidic systems to demonstrate filtration of the smaller-sized particles from a mixed solution of 200 nm and 1 µm particles.

Conference Presentation

Citation Download Citation

Abhay Kotnala, Pavana Siddhartha Kollipara, and Yuebing Zheng "Opto-thermoelectric speckle tweezers for large-scale trapping and filtration of particles", Proc. SPIE 11463, Optical Trapping and Optical Micromanipulation XVII, 114631B (20 August 2020); https://doi.org/10.1117/12.2567825

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