Coalesced‐Droplets Transport to Apexes of Magnetic‐Flexible Cone‐Spine Array

Wang, Lei; Zhang, Miaoxin; Gao, Chunlei; Zheng, Yongmei

doi:10.1002/admi.201600145

Cited by 10 publications

(9 citation statements)

References 29 publications

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“…In the case of ref. 19 , water drops adhered to the surface of a super-hydrophobic conical wire due to the incorporation of nanohairs on the wire surface, providing an approach to avoid the falling of water drops from a hydrophobic wire. As previously discussed, the water drops self-ran towards the tip of the corresponding super-hydrophobic wire 19 , supplying an experimental evidence to support the first case.…”

Section: Resultsmentioning

confidence: 99%

“…It was reported in ref. 19 that water drops moved away from the root towards the tip on a super-hydrophobic conical wire. The wetting degree on the wire surface increased along the same direction, which implies that the assumption of the aforementioned example was met.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, as expected, even small drops were observed in ref. 19 to move from the root towards the tip on the corresponding wire.…”

Section: Introductionmentioning

confidence: 99%

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Conditions for Barrel and Clam-Shell Liquid Drops to Move on Bio-inspired Conical Wires

Luo

Wang

2017

Sci Rep

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It has been reported that, in a foggy environment, water drops with either barrel or clam-shell shapes are capable of self-running on conical wire-like structures, such as cactus spines, spider silk, and water striders’ legs. On the other hand, the corresponding moving mechanisms are still not quite understood. For instance, it is unclear under what conditions clam-shell drops would move from the tip towards the root on a conical wire. In this work, based on the balance of forces, we derive conditions for a drop to self-transport towards or away from the root. We find that, although barrel and clam-shell drops have different shapes, these conditions are applicable to both of them, which thus provide good guidelines for developing artificial fog collectors. Furthermore, based on the derived conditions, we interpret drop movements on both hydrophilic and hydrophobic wires, with the support of experimental results on cactus spines. Finally, our results indicate that not all the cacti are able to harvest water from fog.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Conditions for Barrel and Clam-Shell Liquid Drops to Move on Bio-inspired Conical Wires

Luo

Wang

2017

Sci Rep

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“…This is a step further towards durable SHSs. However, the unidirectional transportation of coalesced droplets from the bottom of the surface to the top can also be achieved by using microscale magnetic‐responsive cone spine (MCS) arrays coved by ZnO nanohairs on the apex, which is induced by a curvature difference in the solid–liquid interface between nanohairs and microcone spins …”

Section: Interfacial Materials For Anti‐icingmentioning

confidence: 99%

“…However,t he unidirectional transportationo fc oalesced droplets from the bottomo ft he surfacet ot he top can also be achieved by using microscale magnetic-responsive cone spine (MCS)a rrays coved by ZnO nanohairs on thea pex, which is inducedb yacurvature difference in the solid-liquid interface between nanohairs and microcone spins. [15] In addition to the impacting water droplets, condensed water can also lead to ice accumulation, which often occurs on the surface of heat exchangers. Thus, timely removal of the condensed water is an efficient approach for preventing the formationo ff rost.…”

Section: Interfacialm Aterials For Anti-icing 21 Timelyremoval Of Wamentioning

confidence: 99%

Interfacial Materials for Anti‐Icing: Beyond Superhydrophobic Surfaces

Jin

Liu

et al. 2018

Chemistry An Asian Journal

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The design and fabrication of interfacial materials for anti-icing is of great importance, since undesired ice accumulation leads to serious economic, energy, and safety issues. Substantial progress on interfacial materials for the passive removal of ice has been achieved in the past three years. The present focus review critically summarizes and analyzes recent breakthroughs in interfacial materials for anti-icing. In particular, we focus on the effect of surface textures on the timely removal of water droplets, the microscopic mechanism of ice formation, and the effect of an interfacial layer's properties on easy shedding of formed ice with a view towards designing high-performance and durable interfacial materials for anti-icing beyond superhydrophobic materials.

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A Multifunctional Radiated Patterned Surface for Fog Collection, Oil/Water Separation, and Interfacial Floatability

Song

Zhang

Cheng

et al. 2022

Adv Materials Inter

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Multifunctional patterned surfaces with special wettability appeal to many researchers because of their potential applications in fog collection, microfluidics, and medical devices. To realize these functions and extend the corresponding application scopes, this article reports a multifunctional superhydrophobic radiated pattern on different wetting surfaces. Intriguingly, the hydrophilic surface with radiated pattern can quickly drive tiny water droplets toward more wetting regions, where water droplets move from center to the edge of a circle with a fog collection rate of about 3.075 g cm−2 h. However, the superhydrophobic surface with the radiated pattern triggers water to move from the edge to the center of a circle and achieves reverse transport. Importantly, the superhydrophobic surface can absorb oil and act as a micro‐reactor to realize oil/water separation. The surface can be transformed to be superhydrophilic by oxygen plasma etching and then recovers the superhydrophobicity by laser etching, which convinces the excellent restoration capacity. Furthermore, the surface composed of a superhydrophobic upper surface and a hydrophobic lower surface shows improved interfacial floatability. The findings offer a novel insight into the design of a multifunctional surface that not only enhances the fog collection but also realizes reverse liquid transport, and oil/water separation.

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Coalesced‐Droplets Transport to Apexes of Magnetic‐Flexible Cone‐Spine Array

Abstract: Coalesced‐droplets can be driven to transport to apexes of magnetic‐flexible cone spine from the bottom due to formation of wettability gradient on superhydrophobic spine with nanohairs.

Cited by 10 publications

References 29 publications

Conditions for Barrel and Clam-Shell Liquid Drops to Move on Bio-inspired Conical Wires

Conditions for Barrel and Clam-Shell Liquid Drops to Move on Bio-inspired Conical Wires

Interfacial Materials for Anti‐Icing: Beyond Superhydrophobic Surfaces

A Multifunctional Radiated Patterned Surface for Fog Collection, Oil/Water Separation, and Interfacial Floatability

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