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5 October 2023 Optically assisted thermophoretic trapping using resonant plasmonic bowtie nano-antennas
Theodore Anyika, Justus C. Ndukaife, Chuchuan Hong, Ikjun Hong
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Proceedings Volume PC12649, Optical Trapping and Optical Micromanipulation XX; PC126491H (2023) https://doi.org/10.1117/12.2680352
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
In this study, a novel method is proposed for low-power trapping of nanoparticles that employs resonant bowtie nano-antennas, which generate high temperature gradients upon laser illumination. The approach involves the integration of the depletion attraction force and the near-field optical gradient force, which results in highly efficient trapping of small extracellular vesicles (EVs) and 100nm polystyrene beads with low power consumption (less than 5mW). Additionally, we demonstrate that rapid transport can be achieved in less than 10 seconds, facilitated by the long-range nature of the depletion attraction force.
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Theodore Anyika, Justus C. Ndukaife, Chuchuan Hong, and Ikjun Hong "Optically assisted thermophoretic trapping using resonant plasmonic bowtie nano-antennas", Proc. SPIE PC12649, Optical Trapping and Optical Micromanipulation XX, PC126491H (5 October 2023); https://doi.org/10.1117/12.2680352
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KEYWORDS
Near field optics
Plasmonics
Particles
Thermography
Biological research
Biological samples
Biomedical optics
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