润湿
材料科学
化学物理
电位梯度
表面电荷
接触角
浓度梯度
纳米技术
工作(物理)
机械
化学工程
复合材料
色谱法
化学
热力学
物理化学
物理
工程类
量子力学
作者
Fangxin Wang,Yongyang Sun,Guanggong Zong,Wenyan Liang,Bin Yang,Fuzheng Guo,Chenyan Yangou,Yübo Wang,Zhichao Zhang
标识
DOI:10.1021/acsami.1c21452
摘要
Surface 2019, surface charge density (SCD) gradient printing-driven droplet transport, has attracted considerable attention as a novel and effective approach, which adopts the water droplet impacting a nonwetting surface to create a reprintable SCD gradient pathway conveniently and realizes the high-velocity and long-distance transport of droplets. In the present work, we further investigated the effects of electrothermal behavior on SCD gradient printing on hydrophobic surfaces by considering the droplet impact dynamics. After the electrothermal function was activated, the wettability of the hydrophobic surface improved in terms of the spreading factor history and the infiltration depth, which increased the probability of solid/liquid contact electrification to generate a more favorable SCD gradient. Since the hydrophobic surface was negatively charged by droplet impact, polarized droplets rolled forward along the preprinted SCD gradient pathway due to opposite charge attraction. Based on these results, we designed a SCD gradient printer with an electrothermal function for hydrophobic surfaces. Subsequently, the kinematic parameters of rolling droplets on hydrophobic surfaces were observed and quantified to evaluate the improvements resulting from the electrothermal function.
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