Publication date: Available online 8 April 2016
Source:Thin Solid Films
Author(s): Xing Wei, Go Kawamura, Hiroyuki Muto, Atsunori Matsuda
A low voltage driven electrowetting on dielectric liquid focus lens was fabricated based on a tiny glass tube which had been coated with ITO (Indium Tin Oxide)-Al2 O3 -TiO2 -Teflon multilayered thin films on the inside. Method of sol-gel/chemical solution dip coating was used for the film preparation. A cambered interface between silicon oil and aqueous solution containing NaCl and sodium dodecyl sulfate (SDS) was used for the lens refraction. The curvature of the interface was adjusted by changing the applied voltage. The contact angle of aqueous solution in oil atmosphere was reduced from 155° to 67° when -10 V DC was applied. The leakage current was only 28 nA at that applied voltage and its focal length changed from -2 mm to infinity then to 10 mm.
Source:Thin Solid Films
Author(s): Xing Wei, Go Kawamura, Hiroyuki Muto, Atsunori Matsuda