English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Charge trapping is a long-standing problem in electrowetting-on-dielectric(EWOD), causing reliability reduction and restricting its practicalapplications. Although this phenomenon has been investigated macroscopically,the microscopic investigations are still lacking. In this work, the trappedcharges are proven to be localized at three-phase contact line region by usingthree detecting methods -- local contact angle measurements, electrowetting(EW) probe, and Kelvin Probe Force Microscopy (KPFM). Moreover, we demonstratethat this EW-induced charge trapping phenomenon can be utilized as a simple andlow-cost method to deposit charges on fluoropolymer surfaces. Charge densitynear the three-phase contact line up to 0.46 mC/m2 and the line width withdeposited charges ranging from 20 to 300 micrometer are achieved by theproposed method. Particularly, negative charge densities do not degrade evenafter harsh testing with a water droplet on top of the sample surfaces for 12hours, as well as after being treated by water vapor for 3 hours. Thesefindings provide an approach for applications which desire stable andcontrollable surface charges.

Electrically controlled localized charge trapping at amorphous fluoropolymer-electrolyte interfaces