Next Article in Journal
Predicting Viscosity and Surface Tension at High Temperature of Porcelain Stoneware Bodies: A Methodological Approach
Next Article in Special Issue
Green Biosynthesis of Silver Nanoparticles Using Eriobotrya japonica (Thunb.) Leaf Extract for Reductive Catalysis
Previous Article in Journal
Tuning the Surface Plasmon Resonance of Lanthanum Hexaboride to Absorb Solar Heat: A Review
Previous Article in Special Issue
Ultralow Interlayer Friction of Layered Electride Ca2N: A Potential Two-Dimensional Solid Lubricant Material
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle

Bifunction-Integrated Dielectric Nanolayers of Fluoropolymers with Electrowetting Effects

1,2, 1,*, 5, 1,* and 1,3,4,*
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
Physics of Complex Fluids, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, 7500AE Enschede, The Netherlands
Shenzhen Guohua Optoelectronics Tech. Co. Ltd., Shenzhen 518110, China
Academy of Shenzhen Guohua Optoelectronics, Shenzhen 518110, China
Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices, Najran University, Najran 11001, Kingdom of Saudi Arabia
Authors to whom correspondence should be addressed.
Materials 2018, 11(12), 2474;
Received: 19 November 2018 / Revised: 29 November 2018 / Accepted: 30 November 2018 / Published: 5 December 2018
(This article belongs to the Special Issue Advanced Functional Nanomaterials and Their Applications)
PDF [2156 KB, uploaded 14 December 2018]


Fluoropolymers play an essential role in electrowetting (EW) systems. However, no fluoropolymer possesses the desirable properties of both hydrophobicity and dielectric strength. In this study, for the first time, we report the integration of two representative fluoropolymers—namely, Teflon AF (AF 1600X) and Cytop (Cytop 809A)—into one bifunctionalized dielectric nanolayer. Within this nanolayer, both the superior hydrophobicity of Teflon AF and the excellent dielectric strength of Cytop were able to be retained. Each composed of a 0.5 μm Cytop bottom layer and a 0.06 μm Teflon AF top layer, the fabricated composite nanolayers showed a high withstand voltage of ~70 V (a dielectric strength of 125 V/μm) and a high water contact angle of ~120°. The electrowetting and dielectric properties of various film thicknesses were also systemically investigated. Through detailed study, it was observed that the thicker Teflon AF top layers produced no obvious enhancement of the Cytop/Teflon AF stack. View Full-Text
Keywords: electrowetting; fluoropolymers; dielectric layer; dielectric strength; contact angle electrowetting; fluoropolymers; dielectric layer; dielectric strength; contact angle

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Wu, H.; Li, H.; Umar, A.; Wang, Y.; Zhou, G. Bifunction-Integrated Dielectric Nanolayers of Fluoropolymers with Electrowetting Effects. Materials 2018, 11, 2474.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top