Heterogeneous Hole Nucleation in Electron-Charged<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>4</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mi>e</mml:mi></mml:math>Wetting Films

Montevecchi, E; Blossey, Ralf

doi:10.1103/physrevlett.85.4743

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…The effect of the nature of the substrate has been studied by several authors namely [4] the critical wetting of pentane on water. The critical adsorption and the layering transitions, at the free surface, of a smectic liquid crystal [5], the effect of segregation on wetting in films of a partially miscible polymer blend [6], the effect of the chain length of alkanes on water [7], the critical adsorption and dimensional crossover in epitaxial FeCo films [8], the heterogeneous hole nucleation in electron-charged 4 He wetting films [9], the existence of tricritical wetting in liquid mixtures of methanol and the n-alkanes [10]. The dynamic aspect has been studied for fluid interface of nanometric curvature formed by capillary condensation between solid substrates [11], for wetting layers [12], and for layering transition in confined liquids [13].…”

Section: Introductionmentioning

confidence: 99%

Wetting and layering transitions in magnetic films

Ez‐Zahraouy¹,

Benyoussef²,

Bahmad³

2006

Physica Status Solidi (a)

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The understanding of the surface effect on wetting and layering transitions was explained both theoretically and experimentally. Indeed, using different spin system models and different numerical and approximate methods such as mean field and effective field theories, real space renormalization technique and Monte-Carlo simulations, it is found that the wetting and layering transitions depend on the nature of the surface magnetic field, the surface coupling strength, the surface crystal field, the geometry of surface, the in-homogeneity of substrate and the quantum fluctuations at the surface. It is also found that the layering transition temperature increases or decreases as a function of the film thickness depending on the surface coupling values. The wetting transition temperature can be greater or smaller than the layering temperature. In the case of a variable surface crystal field, an order-disorder layering reentrance is found with new critical exponents behaviour. The wetting phenomena are also influenced by the nature of the surface. In fact the intra-layer transitions appear under the effect of an edge on the surface and/or corrugated surfaces. However, the intra-layering transitions are found for a surface temperature above, which the surface and the intra-layer surface occur. While the bulk layering and intra-layering transitions appear above another finite temperature which is greater than the former one. Such result is not found in the case of a perfect surface. Beside this, and under the corrugation effect, the pre-wetting phenomena and layering transitions occur at zero temperature, even in the case of a uniform magnetic field. In this case the wetting temperature depends strongly on the width of the corrugated-steps but weakly on its number.

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Section: Introductionmentioning

confidence: 99%

Wetting and layering transitions in magnetic films

Ez‐Zahraouy¹,

Benyoussef²,

Bahmad³

2006

Physica Status Solidi (a)

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“…Meanwhile, in a combined effort of experimentalists and theorists, a very good quantitative understanding of these processes has been achieved [2][3][4][5]. Thin film instabilities can also be triggered by defects, such as vortices in undercooled wetting films of helium on alkali metals [6][7][8] or by the application of thermal gradients to confined polymer films [9][10][11]. For the helium films, the situation is slightly complicated due to the pronounced substrate disorder effects [12,13] which, however, are irrelevant for the strongly asymmetric thermal hysteresis that is common to all wetting systems [14,15,1].…”

Section: Introductionmentioning

confidence: 99%

Deposition from a drop: morphologies of unspecifically bound DNA

Heim

Preuß

Gerstmayer

et al. 2005

J. Phys.: Condens. Matter

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We have studied the morphologies of unspecifically bound DNA on solid substrates that arise when it is deposited from a liquid drop. Depending on the mode of removal of the liquid from the surface, and on the properties of the solvent and substrate, the observed single-molecule morphologies range from elongated to condensed conformations. Further, we have examined the amount of unspecifically bound DNA on microarrays deposited from drying droplets, for which we have employed test systems based on gene fragments of E. coli and oligonucleotides.

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“…(3.1) which has to be included with a Lagrange multiplier), but that the functional form of the surface charge density nðrÞ is fixed as well. We then only need to parametrize nðrÞ in a convenient way which lends itself to analytic calculations [94].…”

Section: The Harmonic Model and Its Approximate Solutionsmentioning

confidence: 99%

Dimple‐assisted dewetting: heterogeneous nucleation in undercooled wetting films

Blossey

2001

Annalen der Physik

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Undercooled wetting films near a first‐order wetting transition exhibit an unusually long lifetime: the thermal nucleation barrier for formation of a critical hole in a film of thickness F diverges according to Γ ∼ exp (ℰc/kBT) where the excess free energy ℰc ∼ Fζ with ζ ≥ 2. Localized perturbations of the liquid‐vapor interface (‘dimples’) are shown to be a useful tool in reducing Γ in a controlled way: they act as heterogeneous nucleation centers for thermal critical nuclei. For 4He wetting films on weak‐binding alkali substrates (Cs, Rb) dimples can be generated either by vortices in a superfluid film or by surface electrons. The theory of the heterogeneous nucleation process initiated by the presence of surface dimples (‘dimple‐assisted dewetting’) is developed, accompanied by quantitative predictions for experiment.

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Heterogeneous Hole Nucleation in Electron-ChargedH4eWetting Films

Cited by 4 publications

References 16 publications

Wetting and layering transitions in magnetic films

Wetting and layering transitions in magnetic films

Deposition from a drop: morphologies of unspecifically bound DNA

Dimple‐assisted dewetting: heterogeneous nucleation in undercooled wetting films

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