Application of self-assembled plasmonic structures for micro fluidic control and sensing

Kyoko Namura; Samir Kumar; Motofumi Suzuki

doi:10.1117/12.2568268

20 August 2020 Application of self-assembled plasmonic structures for micro fluidic control and sensing

Kyoko Namura, Samir Kumar, Motofumi Suzuki

Proceedings Volume 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII; 114621Q (2020) https://doi.org/10.1117/12.2568268
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

We experimentally investigate the simultaneous microfluidic control and visualization of a heated region using gold nanoisland/VO₂ thin films. Gold nanoisland/VO₂ thin films are self-assembled using sputtering and glancing angle deposition techniques. The film shows a metal-insulator transition at approximately 70 °C. Therefore, the film is beneficial for visualizing the heated region inside the microfluidic chamber under a simple optical microscope. Furthermore, the photothermal property of the thin film enables a microbubble and a rapid Marangoni flow to be generated in water. The region heated above 70 °C around the bubble is visualized by the metal- insulator transition of the film. The visualization shows that the Marangoni flow is generated when a portion of the bubble is heated above 70 °C.

Conference Presentation

Citation Download Citation

Kyoko Namura, Samir Kumar, and Motofumi Suzuki "Application of self-assembled plasmonic structures for micro fluidic control and sensing", Proc. SPIE 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII, 114621Q (20 August 2020); https://doi.org/10.1117/12.2568268

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