13 November 2014 Electrowetting actuation of a dye-doped fluorescent droplet
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Abstract
We report tunable color output from a fluorescent dye-doped droplet actuated by electrowetting. The system design, based on a planar electrowetting set-up, is compact and straightforward, with minimal voltage requirements for effective actuation. Fluorescent droplets are sourced from a 1 mM solution of rhodamine 6G in distilled water. Initial contact angle for a dye-doped droplet is 72.1°. At a maximum applied voltage of 20 V, the contact angle decreases to 56.5°. Emission spectra are collected as the droplet fluoresces under UV illumination. Over an electrowetting voltage range of 0 to 20 V, the peak fluorescence wavelength shifts from 568 to 546 nm.
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Raphael A. Guerrero, Rea Divina C. Mero, "Electrowetting actuation of a dye-doped fluorescent droplet", Proc. SPIE 9277, Nanophotonics and Micro/Nano Optics II, 92771X (13 November 2014); doi: 10.1117/12.2071730; https://doi.org/10.1117/12.2071730
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