Inkjet-printed patterned polytitanosiloxane-fluoropolymer composite dielectric layer for micro-optical electrowetting valves. (19th October 2020)

• Record Type: Journal Article
• Authors: Zhou, Rui; Fang, Xiaoting; Cheng, Qi; Zhuang, Lei; Li, Hui; Tang, Biao; Zhou, Guofu
• Is Part Of: Journal of physics. Volume 54:Number 2(2021)
• Publication Date: 2020-10-19
• Subjects: inkjet printing -- polytitanosiloxane -- electrowetting -- micro-optical valve; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/abb9d6
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Fluid motion control has always been essential in electrowetting devices. Using the inkjet printing technique, an organic-inorganic hybrid material, polytitanosiloxane, was patterned as a secondary dielectric under the hydrophobic fluoropolymer coating in an optical electrowetting device (OEWD). The effects of different structural parameters of the inkjet-printed polytitanosiloxane (IPP) layer on both the fluid motion at the microscopic level and the macroscopic visual performances of the device were studied experimentally. The leakage-current test was also performed to evaluate the insulating performance of the composite dielectric layer. In addition, COMSOL Multiphysics was used to simulate the fluid flow inside the OEWD with/without the polytitanosiloxane layer. The results showed that, by introducing this IPP layer, precise fluid motion control and improved performance could be obtained.