Microfluidic mixing on plasmonic nanostructures

Kyoko Namura; Ryoma Sakanai; Yasushi Kojima; Motofumi Suzuki

doi:10.1117/12.2675808

5 October 2023 Microfluidic mixing on plasmonic nanostructures

Kyoko Namura, Ryoma Sakanai, Yasushi Kojima, Motofumi Suzuki

Proceedings Volume 12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI; 1264807 (2023) https://doi.org/10.1117/12.2675808
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

In this study, we demonstrated rapid microfluidic mixing using the photothermal properties of gold nanoisland films. By focusing laser beams on a gold nanoisland film, bubbles were successfully generated in a 100-μm-thick fluid chamber filled with non-degassed water. Air-rich and water vapor-rich bubbles were generated by simultaneously irradiating two laser spots. Although water was not degassed, the water vapor-rich bubble was held next to the air-rich bubble for more than 10s, during which time a strong flow was generated. As a result, an area with a diameter of 1.5-2mm around the laser spot was stirred for approximately 3s. This method requires only a laser and thin film and does not require fluid degassing, making the method a promising active micromixer with a simple structure.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kyoko Namura, Ryoma Sakanai, Yasushi Kojima, and Motofumi Suzuki "Microfluidic mixing on plasmonic nanostructures", Proc. SPIE 12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI, 1264807 (5 October 2023); https://doi.org/10.1117/12.2675808

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