Superpropulsion of Droplets and Soft Elastic Solids

Raufaste, Christophe; Chagas, Gabriela Ramos; Darmanin, Thierry; Claudet, Cyrille; Guittard, Frédéric; Celestini, Franck

doi:10.1103/physrevlett.119.108001

Cited by 30 publications

(43 citation statements)

References 17 publications

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“…In many cases, using solvent CH 2 Cl 2 the sliding angles are near 0°: the water droplets slip even on horizontal meshes. The ejection test method [ 38–40 ] was used on the most superhydrophobic mesh for both polymers to further investigate their sliding behavior. Figure shows that the droplets ejection is easier for the meshes containing Thieno‐C 4 F 9 than Thieno‐C 8 F 17 .…”

Section: Resultsmentioning

confidence: 99%

Templateless Electrodeposition of Conducting Polymer Nanotubes on Mesh Substrates

Fradin

Celestini

Guittard

et al. 2020

Macro Chemistry & Physics

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Creating homogeneous nanostructures of complex substrates such as meshes remains a real challenge for practical applications. Here, a templateless elecropolymerization method is used to create conducting polymer nanotubes. Using thieno[3,4‐b]thiophene‐based monomers, nanotubes are obtained especially using dichloromethane saturated in water (CH2Cl2 + H2O) in order to release a high amount of O2 and H2 bubbles. Two strategies are used by direct electropolymerization or posttreatment by simple esterification reaction. By direct electropolymerization, the surface morphology is highly dependent on the used monomer. By contrast, by posttreatment it is possible to obtain the same structure and to change the surface energy during the posttreatment. With the last strategy, it is possible to reach superhydrophobic mesh with ultra‐low water adhesion and high oleophobic properties, even with short fluorinated chains (C4F9).

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Section: Resultsmentioning

confidence: 99%

Templateless Electrodeposition of Conducting Polymer Nanotubes on Mesh Substrates

Fradin

Celestini

Guittard

et al. 2020

Macro Chemistry & Physics

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“…We have recently described a general phenomenon of Superpropulsion for which an elastic object can be propelled by a catapult‐like system with an efficient gain in kinetic energy . The same phenomenon has been used to propose a new method, ETM, to dynamically characterize adhesive behavior of sticky and non‐sticky surfaces .…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, droplet fragmentation can also be observed: depending on the surface wettability and initial catapult acceleration, the droplet can take off from the surface with or without fragmentation. This method was validated for the first time in our previous works which highlighted the new phenomena of Superpropulsion, by using soft balls and liquid droplets, and by showing the fragmentation effect on parahydrophobic surfaces …”

Section: Introductionmentioning

confidence: 89%

“…While there has been a lack of new procedures to quantify water adhesion between a liquid droplet and a substrate, very recently a new method, the ejection test method (ETM), was reported to better characterize the water adhesion on different substrates . ETM consists of ejecting water droplets placed on a substrate using a catapult system with a controlled amplitude and, consequently, also controlled acceleration.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Wetting Properties of Mesh Substrates with Tunable Water Adhesion

et al. 2019

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In nature, wetting phenomena are present nearly everywhere and are a source of inspiration for liquid transportation. A good understanding of the underlying dynamic phenomena that governs wettability is therefore extremely important for researchers involved in bio‐inspired surfaces. Herein, we study the adhesive behavior with water of mesh substrates modified with structured copolymers in order to tune the surfaces from parahydrophobic states (high water adhesion) to superhydrophobic states (low water adhesion). Using the ejection test method (ETM), a new technique that consists of the ejection of water droplets deposited onto a substrate with the aid of a catapult system, we experimentally demonstrate that the elasticity of the mesh substrate can be exploited for efficient vertical actuation of droplets.

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“…Characterizing surfaces with tunable water adhesion from ultra‐low to very‐high is a rather difficult task, and especially when looking at the dynamic wetting properties. We recently proposed an ejection test method (ETM) consisting of the use of a catapult‐like engine to propel drops . Depending on surface properties we can observe either water droplet ejections with or without fragmentations.…”

Section: What Is the Most Significant Results Of This Study?mentioning

confidence: 99%