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| 1 | Water droplet impact on superhydrophobic surfaces with microstructures and hierarchical roughness显示文摘Quantitative correlation between the critical impact velocity of droplet and geometry of superhydrophobic surfaces with microstructures is systematically studied.Experimental data shows that the critical impact velocity induced wetting transition of droplet on the superhydrophobic surfaces is strongly determined by the perimeter of single micropillar,the space between the repeat pillars and the advancing contact angle of the sidewall of the micropillars.The proposed model agrees well with the experimental results,and clarifies that the underlying mechanism which is responsible for the superhydrophobic surface with hierarchical roughness could sustain a higher liquid pressure than the surfaces with microstructures. | HAO PengFei LV CunJing NIU FengLei YU Yu | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，7： | 11 |
| 2 | Evaporating behaviors of water droplet on superhydrophobic surface显示文摘We investigated the dynamic evaporating behaviors of water droplet on superhydrophobic surfaces with micropillars.Our experimental data showed that receding contact angles of the water droplet increased with the decreasing of the scale of the micropillars during evaporation,even though the solid area fractions of the microstructured substrates remained constant.We also experimentally found that the critical contact diameters of the transition between the Cassie-Baxter and Wenzel states are affected not only by the geometrical parameters of the microstructures,but also by the initial volume of the water droplet.The measured critical pressure is consistent with the theoretical model,which validated the pressure-induced impalement mechanism for the wetting state transition. | HAO PengFei LV CunJing HE Feng | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，12： | 2 |
| 3 | Suspended penetration wetting state of droplets on microstructured surfaces显示文摘When a water droplet on a micropillar-structured hydrophobic surface is submitted to gradually increased pressure, the CassieBaxter wetting state transforms into the Wenzel wetting state once the pressure exceeds a critical value. It has been assumed that the reverse transition(Wenzel-to-Cassie-Baxter wetting state) cannot happen spontaneously after the pressure has been removed.In this paper, we report a new wetting-state transition. When external pressure is exerted on a droplet in the Cassie-Baxter wetting state on textured surfaces with high micropillars to trigger the breakdown of this wetting state, the droplet penetrates the micropillars but does not touch the base of the surface to trigger the occurrence of the Wenzel wetting state. We have named this state the suspended penetration wetting state. Spontaneous recovery from the suspended penetration wetting state to the initial Cassie-Baxter wetting state is achieved when the pressure is removed. Based on the experimental results, we built models to establish the penetration depth that the suspended penetration wetting state could achieve and to understand the energy barrier that influences the equilibrium position of the liquid surface. These results deepen our understanding of wetting states on rough surfaces subjected to external disturbances and shed new light on the design of superhydrophobic materials with a robust wetting stability. | Jing Lou SongLin Shi Chen Ma CunJing Lv QuanShui Zheng | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，4： | 2 |
| 4 | Wetting of graphene oxide: A molecular dynamics study显示文摘 | Wei Ning Lv Cunjing Xu Zhiping | 2014 | Langmuir2014，30，12： | 1 |
| 5 | Sliding of Water Droplets on Microstructured Hydrophobic Sur-faces显示文摘 | Cunjing Lv Quanshui Zheng | | 0，，26： | 1 |
| 6 | Wetting property of smooth and textured hydrophobic surfaces under condensation condition显示文摘Static and dynamic wetting behaviors of sessile droplet on smooth,microstructured and micro/nanostructured surface under condensation condition are systematically studied.In contrast to the conventional droplet wetting on such natural materials by dropping,we demonstrate here that when dropwise condensation occurs,the sessile droplet will transit from the Cassie-Baxter wetting state to the Wenzel wetting state or partial Cassie-Baxter wetting state on the microstructured surface or the micro/nanostructured surface,which leads to a strong adhesion between the droplet and the substrate.In contrast,the apparent contact angle and the sliding angle on the smooth surface changes a little before and after the condensation because of small roughness.Theoretical analysis shows that the roughness factor controls the adhesion force of the droplet during condensation,and a theoretical model is constructed which will be helpful for us to understand the relationship between the adhesion force and the geometry of the surface. | HAO PengFei LV CunJing YAO ZhaoHui NIU FengLei | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，11： | 0 |
| 7 | Writing with a nano-grooved pin显示文摘As a basic technology, dispensing liquid into small droplets is widely used in many nowadays technologies, such as 3D printing [I-4], biological/chemical patterning [5-7], and drug discovery [8,9]. Traditional transfer methods by pipette or pin, which may date to 4000 years ago [10], are simple and cheap to generate droplets bigger than μ100 pm [11] for most materials. | DONG HuaLai YANG Xing LV CunJing WANG Jin ZHENG QuanShui | 2019 | Science China(Technological Sciences)2019，62，9： | 0 |
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