On the Landau−Levich Transition

Maleki, Maniya; Reyssat, Étienne; Quéré, David; Golestanian, Ramin

doi:10.1021/la700822y

Cited by 37 publications

(39 citation statements)

References 22 publications

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“…Retrovirus-based strategies have been extensively characterized in human clinical trials and offer low immunogenicity, high transduction efficiency, and sustained transgene expression (24,25). Despite these advantages, retroviral vectors are limited by their lack of specificity for target cell-types and their potential for insertional mutagenesis due to random integration into the host cell genome.…”

Section: Discussionmentioning

confidence: 99%

“…PLL gradients were generated by dipping scaffolds into a solution of FITC-labeled PLL at a controlled rate using a motorized dip coater (60-700 m/s dipping speed range). This approach is commonly used in industrial coating applications to vary coating density/ thickness according to the Landau-Levich law (24). Confocal microscopy image analysis demonstrated that coating density depends on incubation/residence time in the coating solution and, therefore, the dipping speed (Fig.…”

Section: 0e-11mentioning

confidence: 99%

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Engineering graded tissue interfaces

Phillips

Burns

Doux

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

200

177

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Interfacial zones between tissues provide specialized, transitional junctions central to normal tissue function. Regenerative medicine strategies focused on multiple cell types and/or bi/tri-layered scaffolds do not provide continuously graded interfaces, severely limiting the integration and biological performance of engineered tissue substitutes. Inspired by the bone-soft tissue interface, we describe a biomaterial-mediated gene transfer strategy for spatially regulated genetic modification and differentiation of primary dermal fibroblasts within tissue-engineered constructs. We demonstrate that zonal organization of osteoblastic and fibroblastic cellular phenotypes can be engineered by a simple, one-step seeding of fibroblasts onto scaffolds containing a spatial distribution of retrovirus encoding the osteogenic transcription factor Runx2/Cbfa1. Gradients of immobilized retrovirus, achieved via deposition of controlled poly(L-lysine) densities, resulted in spatial patterns of transcription factor expression, osteoblastic differentiation, and mineralized matrix deposition. Notably, this graded distribution of mineral deposition and mechanical properties was maintained when implanted in vivo in an ectopic site. Development of this facile and robust strategy is significant toward the regeneration of continuous interfacial zones that mimic the cellular and microstructural characteristics of native tissue.

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Section: Discussionmentioning

confidence: 99%

Section: 0e-11mentioning

confidence: 99%

Engineering graded tissue interfaces

Phillips

Burns

Doux

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

200

177

View full text Add to dashboard Cite

show abstract

“…In the literature we find a number of different definitions and is still subject to discussion [1,22,26]. Here we define θ as the local interface slope defined by a linear fit, at a fixed distance from the contact line.…”

Section: Dynamic Contact Anglementioning

confidence: 99%

Receding contact lines: From sliding drops to immersion lithography

Winkels

Peters

Evangelista

et al. 2011

Eur. Phys. J. Spec. Top.

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Abstract. Instabilities of receding contact lines often occur through the formation of a corner with a very sharp tip. These dewetting structures also appear in the technology of Immersion Lithography, where water is put between the lens and the silicon wafer to increase the optical resolution. In this paper we aim to compare corners appearing in Immersion Lithography to those at the tail of gravity driven-drops sliding down an incline. We use high speed recordings to measure the dynamic contact angle and the sharpness of the corner, for varying contact line velocity. It is found that these quantities behave very similarly for Immersion Lithography and drops on an incline. In addition, the results agree well with predictions by a lubrication model for cornered contact lines, hinting at a generic structure of dewetting corners.

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“…The quasi-static behavior is observed at the low velocity of 1 µm/s, while for much larger velocities, departures from quasi-static behavior are visible both in the appearance of the pancake and in the evolution of the central capillary bridge which now depends on the pull off velocity. The appearance of the pancake appears very similar to a Landau-Levich transition [17][18][19][20] when a solid plate is pulled off a liquid bath, a flat wetting film remains deposited on the surface above a given critical pull off velocity, connected to the liquid bath by a transition zone which profile has been described in details 20 . The retraction of the pancake should be very similar to a hydrodynamic dewetting process 21 .…”

Section: Dynamic Behavior: Final Rupture Of the Capillary Bridgementioning

confidence: 99%

Capillary Bridge Formation and Breakage: A Test to Characterize Antiadhesive Surfaces

2008

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In order to characterize very weakly adhesive surfaces, we have developed a quantitative test inspired by the JKR adhesion test for soft adhesives, which relies on the formation and then the rupture of a capillary bridge between the surface to be tested and a liquid bath. Both the shape and the kinetics of breakage of the capillary bridge for various coatings put into contact with liquids of various viscosities and surface tensions have been studied. Several pull off regimes can be distinguished. For low pull off velocities, a quasi-static regime is observed, well described by capillary equations, and sensitive to the hysteresis of the contact angle of the fluid on the coating. Above a critical pull off velocity which depends on the fluid viscosity, a dynamic regime is observed, characterized by the formation of a flat pancake of fluid on the coating which recedes more slowly than the capillary bridge itself. After the breakage of the capillary bridge, a small drop can remain attached to the surface. The volume of this drop depends on the dynamical regime, and is strongly affected by very small differences between the coatings. The aptitude of this test in characterizing very weakly adhesive surfaces is exemplified by a comparison between three slightly different perfluorinated coatings.3

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On the Landau−Levich Transition

Cited by 37 publications

References 22 publications

Engineering graded tissue interfaces

Engineering graded tissue interfaces

Receding contact lines: From sliding drops to immersion lithography

Capillary Bridge Formation and Breakage: A Test to Characterize Antiadhesive Surfaces

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