Dewetting of Ultrathin Solid Films

Pierre-Louis, Olivier; Chame, Anna; Saitō, Yukio

doi:10.1103/physrevlett.103.195501

Cited by 55 publications

(87 citation statements)

References 19 publications

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“…[7][8][9][10][11] When substrate surface is patterned, there is an additional effect on wetting properties of solid adsorbates such that the location and size of adsorption can be controlled. [12][13][14][15][16] On a substrate with nanopillars, one expects "supersolidphobicity," similar to the liquid droplets, but instead of the flow properties, improvement of the solid quality is expected.…”

Section: Introductionmentioning

confidence: 99%

Collapse of an adsorbate island on substrate pillars

2010

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We study an equilibrium shape of an adsorbate solid island on a substrate surface patterned with arrays of pillars. For a large island with a weak wettability to the substrate, an island sits on top surfaces of pillars, in a state called Cassie-Baxter ͑CB͒ state. In the opposite case of a small island with a strong wettability, the island collapses in the space between pillars, forming the so-called Wenzel ͑W͒ state. The collapse transition from CB to W state is studied in the phase space of the island volume and the wettability. Theory leads to collapse transition lines for an island with only ͑100͒ facets at zero temperature. They are in good agreement with the transitions observed in kinetic Monte Carlo simulations of an island with additional ͑110͒ and ͑111͒ facets at a finite temperature.

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Section: Introductionmentioning

confidence: 99%

Collapse of an adsorbate island on substrate pillars

2010

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“…[31][32][33] In the case of crystalline thin films, the holes nucleation was described by a breaking time which follows an exponential evolution with temperature. 34 The second regime (retraction) is controlled by the surface diffusion from the edges of the holes. The third regime (coalescence) requires to overcome an additional nucleation barrier to come into contact.…”

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Design of free patterns of nanocrystals with ad hoc features via templated dewetting

Aouassa

Berbézier

Favre

et al. 2012

Applied Physics Letters

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Design of monodisperse ultra-small nanocrystals (NCs) into large scale patterns with ad hoc features is demonstrated. The process makes use of solid state dewetting of a thin film templated through alloy liquid metal ion source focused ion beam (LMIS-FIB) nanopatterning. The solid state dewetting initiated at the edges of the patterns controllably creates the ordering of NCs with ad hoc placement and periodicity. The NC size is tuned by varying the nominal thickness of the film while their position results from the association of film retraction from the edges of the lay out and Rayleigh-like instability. The use of ultra-high resolution LMIS-FIB enables to produce monocrystalline NCs with size, periodicity, and placement tunable as well. It provides routes for the free design of nanostructures for generic applications in nanoelectronics

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“…Recently, solid-state dewetting has been attracting increased attention both because of interest in the underlying pattern formation physics and its potential application as an economical approach to obtain nanostructured surfaces and nanodevices [9][10][11][12][13][14][15][16][17][18].…”

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Solid-state dewetting and island morphologies in strongly anisotropic materials

et al. 2016

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We propose a sharp-interface continuum model based on a thermodynamic variational approach to investigate the strong anisotropic effect on solid-state dewetting including contact line dynamics. For sufficiently strong surface energy anisotropy, we show that multiple equilibrium shapes may appear that can not be described by the widely employed Winterbottom construction, i.e., the modified Wulff construction for an island on a substrate. We repair the Winterbottom construction to include multiple equilibrium shapes and employ our evolution model to demonstrate that all such shapes are dynamically accessible.Keywords: Solid-State Dewetting, Anisotropy, Winterbottom Construction, Surface Diffusion, Contact Line Migration.Solid-state dewetting is a ubiquitous phenomenon in thin film technology [1][2][3][4][5] which can either be deleterious, destabilizing a thin film structure, or advantageous, leading to the controlled formation of an array of nanoscale particles, e.g., used in sensor devices [6] and as catalysts for the growth of carbon or semiconductor nanowires [7,8]. Recently, solid-state dewetting has been attracting increased attention both because of interest in the underlying pattern formation physics and its potential application as an economical approach to obtain nanostructured surfaces and nanodevices [9][10][11][12][13][14][15][16][17][18].The dewetting of thin solid films deposited on substrates is similar to the dewetting of liquid films [19,20]. However, mass transport during solid-state dewetting is usually dominated by surface diffusion rather than fluid dynamics. Solid-state dewetting can be modeled as interfacetracking problem where morphology evolution is governed by surface diffusion and contact line migration [17,18]. In early studies, a number of simplifying assumptions were made in order to keep the analysis tractable. For example, under the assumption that all interface energies are isotropic, Srolovitz and Safran [9] proposed a sharpinterface model to analyze hole growth; based on the above model, Wong et al. [10,11] designed a "marker particle" numerical scheme to study the two-dimensional retraction of an island and a perturbed cylindrical wire on a substrate. Recently, we [17] solved a similar problem using a phase field approach that naturally captures the topological events that occur during evolution and is applicable in * Corresponding author.Email addresses: jiangwei1007@whu.edu.cn (Wei Jiang), matbaowz@nus.edu.sg (Weizhu Bao) any number of dimensions.However, many experiments have demonstrated that the morphology evolution that occurs during thin solid film dewetting is strongly affected by crystalline anisotropy [3]. Recent approaches that incorporate crystalline anisotropy have included a discrete model [12], a kinetic Monte Carlo method [13,14] and the crystalline method [15,16]. The main drawback of these approaches is that the evolution does not account for the full anisotropic free energy of the system or do not represent a completely mathematical description. To...

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Dewetting of Ultrathin Solid Films

Cited by 55 publications

References 19 publications

Collapse of an adsorbate island on substrate pillars

Collapse of an adsorbate island on substrate pillars

Design of free patterns of nanocrystals with ad hoc features via templated dewetting

Solid-state dewetting and island morphologies in strongly anisotropic materials

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