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Definitions • Electrowetting: modification of the properties of the droplet’s surface by applying electricity. • Modifies contact angle and surface tension. • Surface from hydrophobic to hydrophilic • Microfluidics: use of small volumes of fluid to perform tasks (reactions, movement, mixing) • Free Surface: system where the droplet is in contact with the air. • Hydrophobic: repels water • Hydrophilic: attracts water 22
Contact Angle • Distance at which the liquid (droplet) and vapor (air) interface meets a solid surface. • If the angle is: • >90 surface is hydrophilic •
Page 1 and 2: Juan David Gutierrez-Franco Mechani
Page 3 and 4: The Big Picture • Mixing chemical
Page 5 and 6: Lab-on-a-Chip mixing chemicals 2.5
Page 7 and 8: Research Method: Electrowetting •
Page 9 and 10: Research Method: Electrowetting 65.
Page 11 and 12: Effect of Molarity on Electrowettin
Page 13 and 14: Evaporation Once the droplets are m
Page 15 and 16: Calibration of RTD • Fabrication
Page 17 and 18: Summary • 17
Page 19 and 20: Acknowledgments • INSET Program o
Page 24 and 25: Electrolysis • KCl is present in
Page 26 and 27: Residue seen on chips Desired resid
Page 28 and 29: Before After 28
Page 30 and 31: RTD Cross-Section • Two layers
Page 32: Evaporation Rate Curve • 32

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