Dewetting of thin polymer films
Web47 minutes ago · Interfacing recognition materials with transducers has consistently presented a challenge in the development of sensitive and specific chemical sensors. In … 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” …
Dewetting of thin polymer films
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WebSep 25, 2005 · Figure 2: The shape of the rim during early stages of dewetting of thin polymer films on non-adsorbing substrates. a , The sequence of three fundamentally different shapes of the rim found ... WebAug 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 …
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. WebOct 10, 2001 · Investigations of the opening of holes in thin, almost glassy polystyrene films deposited onto silicon wafers coated with a polydimethylsiloxane monolayer revealed …
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 … 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 ...
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;
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, … flight ups louisville to rduWebApr 9, 2024 · Commercially available biomedical wearable sensors to measure tensile force/strain still struggle with miniaturization in terms of weight, size, and conformability. Flexible and epidermal electronic devices have been utilized in these applications to overcome these issues. However, current sensors still require a power supply and some … greater allen cathedral facebookWebThe stability of thin liquid films on a surface depends on the excess free energy of the system involving various short‐range and long‐range interactions. When forced to wet an unfavorable surface, thin liquid films dewet into multiple small‐sized droplets via spinodal, homogeneous, or heterogeneous nucleation process. However, if the total excess free … flight ur710Web47 minutes ago · Interfacing recognition materials with transducers has consistently presented a challenge in the development of sensitive and specific chemical sensors. In this context, a method based on near-field photopolymerization is proposed to functionalize gold nanoparticles, which are prepared by a very simple process. This method allows in situ … flight urbana to freetownWebFeb 21, 2006 · The Dewetting of thin polymer films (60–300 nm) on a non-wettable liquid substrate has been studied in the vicinity of their glass transition temperature. In our experiment, we observe a global contraction of the film while its thickness remains uniform. We show that, in this case, the strain corresponds to simple extension, and we verify ... greater allen cathedral.orgIn most dewetting studies a thin polymer film is spin-cast onto a substrate. Even in the case of the film does not dewet immediately if it is in a metastable state, e.g. if the temperature is below the glass transition temperature of the polymer. Annealing such a metastable film above its glass transition temperature increases the mobility of the polymer-chain molecules and dewetting takes place. greater allen cathedral of new york facebookWebJan 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 … flight upside down plane