电润湿
插层(化学)
化学
石墨
润湿
电解质
拉曼光谱
离子
接触角
化学物理
化学工程
分析化学(期刊)
无机化学
光学
有机化学
物理化学
电极
物理
工程类
作者
Athanasios A. Papaderakis,Andinet Ejigu,Jing Yang,Amr Elgendy,Boya Radha,Ashok Keerthi,Anne Juel,Robert A. W. Dryfe
摘要
The unique layered structure of graphite with its tunable interlayer distance establishes almost ideal conditions for the accommodation of ions into its structure. The smooth and chemically inert nature of the graphite surface also means that it is an ideal substrate for electrowetting. Here, we combine these two unique properties of this material by demonstrating the significant effect of anion intercalation on the electrowetting response of graphitic surfaces in contact with concentrated aqueous and organic electrolytes as well as ionic liquids. The structural changes during intercalation/deintercalation were probed using in situ Raman spectroscopy, and the results were used to provide insights into the influence of intercalation staging on the rate and reversibility of electrowetting. We show, by tuning the size of the intercalant and the stage of intercalation, that a fully reversible electrowetting response can be attained. The approach is extended to the development of biphasic (oil/water) systems that exhibit a fully reproducible electrowetting response with a near-zero voltage threshold and unprecedented contact angle variations of more than 120° within a potential window of less than 2 V.
科研通智能强力驱动
Strongly Powered by AbleSci AI