Dewetting of thin polymer films

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August undefined, 2024

WebAug 1, 1998 · The dewetting of thin polymer films on solid substrates has been studied extensively in recent years. These films can decay either by nucleation events or by spinodal dewetting, essentially only ... WebOct 1, 2000 · The melting temperature (Tm) of thin poly[ethylene-co-(vinyl acetate)] films coated on a silicon wafer was investigated. Ellipsometry was used to measure the Tm which was found to decrease ...

Dewetting of a thin polymer film under shear - ScienceDirect

WebWe study the dewetting of thin polymer films deposited on slippery substrate. Recent experiments on these systems have revealed many unexpected features. We develop … WebNov 19, 2024 · The problem studied is represented in Fig. 1.A glassy polymer (such as PS) thin film of nominal thickness h 0 typically below 100 nm is lying on a substrate and heated well above its glass transition temperature T g.For a PS film, T g is about 100 °C and the temperature of the study, similar to the processing temperature, would be close to 200 … grizzly nursery nolanville tx

Research Highlight - Polymer Film Dewetting

WebApr 12, 2008 · Figure 4. Fluorescent images of FITC-BSA absorbed on the PS patterns fabricated by the dewetting of PS thin films having different thickness of (a) 20.2, (b) 17.5, and (c) 12.3 nm from the PEG-silane-modified silicon surfaces. (d) AFM line profile for a dewetted PS droplet prior to incubation of a BSA solution. Regardless of the droplet size, … WebMay 24, 2016 · The presence of the acetone enriched layer accounts for the exponential kinetic behavior in the case of a thin PS film with low M w. However, the acetone enriched layer is not observed in the case of a thin PS film with high M w (M w = 400 kg mol −1) and the slippage effect of polymer chains is valid during the dewetting process. WebJan 6, 1992 · Thin polystyrene films (<100 nm) on silicon substrates undergo dewetting when annealed above the glass transition temperature. Three different stages can be distinguished: The smooth … grizzly nyt crossword

Influence of film structure on the dewetting kinetics of thin polymer ...

Dewetting of Highly Elastic Thin Polymer Films

WebJul 1, 2012 · For example, dewetting of thin polymer films was observed on a substrate modified with the chemically identical polymer brush [122], and the modification of the polymer chains occasionally caused phase separation, which can also result in the dewetting of the film [91], [123], [124]. The cross-linking of the polymers may results in … WebWe study the dewetting of thin polymer films deposited on slippery substrate. Recent experiments on these systems have revealed many unexpected features. We develop here a model that takes into account the rheological properties of polymer melts, focussing on two dewetting geometries (the receding of a straight edge, and the opening of a hole). fig newton alternativesWebOct 31, 2006 · Abstract and Figures. We study the dewetting of thin polymer films deposited on slippery substrate. Recent experiments on these systems have revealed many unexpected features. We develop … fig newton australia

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Dewetting of thin polymer films

Electric Field Driven Reversible Spinodal Dewetting of Thin Liquid ...

WebThe dewetting behavior of ring polystyrene (RPS) film and linear polystyrene (LPS) film on silanized Si substrates with different grafting densities and PDMS substrate was investigated. Results showed that polymer architectures greatly influenced the dewetting behavior of the thin polymer film. On the silani WebJan 20, 2004 · Energetic considerations indicate that long-range Van der Waals forces stabilize thin polystyrene (PS) films against height fluctuations on silicon substrates. Nevertheless, we report here on the amplification of capillary waves of specific wavelengths for 15 nm thick PS films on silicon, ultimately leading to dewetting in a “spinodal-like” …

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WebNov 19, 2024 · The problem studied is represented in Fig. 1.A glassy polymer (such as PS) thin film of nominal thickness h 0 typically below 100 nm is lying on a substrate and … WebJul 2, 2004 · We use molecular dynamics simulations to study the dewetting dynamics of nanofilled polymer thin films on a substrate. We find that the addition of nanofillers can …

WebApr 19, 2024 · Thin polymer films on hydrophobic substrates are susceptible to rupture and hole formation. ... RA Weiss, Spinodal dewetting of thin polymer films. Phys Rev … WebJan 1, 2024 · Dewetting of polymer thin films particularly occur when coated onto non-wetting substrates and heated above the glass transition temperature. This results in polymer flow and rearrangement into a configuration that minimizes the net interfacial energy of the system [1]. The process of dewetting (or uncovering of the substrate by …

Web徐林, 张欢欢, 石彤非 (1. 贵州师范学院表面物理与化学实验室, 贵阳 550018; 2. 中国科学院长春应用化学研究所, 高分子物理与化学国家重点实验室, 长春 130022; WebJan 1, 2012 · Clearly, the number of holes and the diameter at a given time of dewetting decrease with ageing time. The size of the images is 310 μm × 210 μm. Full size image. The presence of residual stresses in polymer thin films can thus be considered as an explanation for the rupture mechanism via heterogeneous nucleation.

WebJan 6, 1992 · Thin polystyrene films (100 nm) on silicon substrates undergo dewetting when annealed above the glass transition temperature. Three different stages can be distinguished: The smooth films break up by the creation of cylindrical holes. The holes …

WebIn this paper we present a theoretical model for the dewetting of ultrathin polymer films. Assuming that the shear-thinning properties of these films can be described by a Cross … fig newton calorie countWebApr 19, 2024 · Thin polymer films on hydrophobic substrates are susceptible to rupture and hole formation. ... RA Weiss, Spinodal dewetting of thin polymer films. Phys Rev Lett 81, 1251–1254 (1998). Crossref. Google Scholar. 31. R Seemann, S Herminghaus, K Jacobs, Gaining control of pattern formation of dewetting liquid films. J Phys Condens … fig newton appleWebAug 1, 1998 · Abstract. Dewetting of polystyrene (PS) films on a silicon substrate is investigated as a function of film thickness, h. We observe the nucleation of holes in the … fig newton biblesWebMicropatterned surfaces are important in many biomedical and bioengineering applications, such as the development of biosensors. An approach for the creation of ordered surface … fig newton calories per servingWebMobility Gradient of Polystyrene in Films Supported on Solid Substrates, by Yoshihisa Fujii, Hiroshi Morita, Atsushi Takahara and Keiji Tanaka.- Probing Properties of Polymers in Thin Films Via Dewetting, by Gunter Reiter.- Heterogeneous and Aging Dynamics in Single and Stacked Thin Polymer Films, by Koji Fukao, Takehide Terasawa, Kenji Nakamura, … fig newton carbohydratesWebIn this paper we present a theoretical model for the dewetting of ultrathin polymer films. Assuming that the shear-thinning properties of these films can be described by a Cross-type constitutive equation, we analyze the front morphology of the dewetting film, and characterize the time evolution of the dry region radius, and of the rim height. fignewton clif barsWebThe absence of solvent in the CVD process enables the growth of high-purity layers and avoids the potential of dewetting phenomena, which lead to pinhole defects. By limiting contaminants and defects, ultrathin (<10 nm) CVD polymeric device layers have been fabricated in multiple laboratories. ... Thicknesses of the polymer thin films were ... fig newton carbs