Electrowetting actuation of a dye-doped fluorescent droplet

• Main Authors: Mero, Rea Divina C, Guerrero, Raphael A
• Format: text
• Published: Archīum Ateneo 2014
• Subjects: Electrowetting; rhodamine 6G; color display; tunable fluorescence; Optics; Physics
• Online Access: https://archium.ateneo.edu/physics-faculty-pubs/12; https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9277/92771X/Electrowetting-actuation-of-a-dye-doped-fluorescent-droplet/10.1117/12.2071730.short?SSO=1
• Institution: Ateneo De Manila University

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 72.1o.At a maximum applied voltage of 20 V, the contact angle decreases to 56.5o . 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.