Laser-induced film ejection at interfaces: Comparison of the dynamics of liquid and solid films
نویسنده
چکیده
The ejection dynamics of nanometer-thin fluid isopropanol and solid C02 films are investigated. The films are deposited on a silicon substrate, which is rapidly heated by a nanosecond laser pulse (Nd:YAG, 532 nm). A small fraction of material at the interface evaporates and the film on top is ejected as an intact layer. The kinetic energies of the two different films with thicknesses between 100 nm and I IJm give an insight into the dynamics of a flying lamella.
منابع مشابه
Time-resolved dynamics of laser-induced micro-jets from thin liquid films
Laser-induced forward transfer (LIFT) is a high-resolution direct-write technique, which can print a wide range of liquid materials without a nozzle. In this process, a pulsed laser initiates the expulsion of a highvelocity micro-jet of fluid from a thin donor film. LIFT involves a novel regime for impulsively driven free-surface jetting in that viscous forces developed in the thin film become ...
متن کاملNew Sol-Gel Solution with 45 Days Stability for Preparation Silica Thin Films
As we know sol-gel is one of the most important techniques for thin film preparation. In this paper, high transmission silica thin films have been prepared by dip-coating process from a new silicon-alkoxide solution. The prepared sol was stable for 45 days which is very important to characterize the coating process. The optical properties as a function of aging time, withdrawal rate, and he...
متن کاملCharacterization and Corrosion Behavior of Hydroxyapatite- Coated Titanium Substrates Prepared Through Laser Induced Liquid Deposition Technique
Titanium and titanium alloys are often used in orthopedic surgery and dentistry because of their especial characteristics such as biocompatibility, mechanical properties, and corrosion resistance. However, their bio- inertness is the most serious drawback for biomedical applications. Therefore, a bioactive coating like hydroxyapatite (HA) is coated on their surface. In this regard, in the prese...
متن کاملPhase-separation of mixed surfactant monolayers: a comparison of film morphology at the solid-air and liquid-air interfaces.
The morphologies of phase-separated monolayer films prepared from two different binary mixtures of perfluorocarbons and hydrocarbons have been examined and compared, for the first time, at the solid-air and liquid-air interfaces. Films were comprised of binary mixtures of arachidic acid (C(19)H(39)COOH) with perfluorotetradecanoic acid (C(13)F(27)COOH) and of palmitic acid (C(15)H(31)COOH) with...
متن کاملSurfactant-induced rigidity of interfaces: a unified approach to free and dip-coated films.
The behavior of thin liquid films is known to be strongly affected by the presence of surfactants at the interfaces. The detailed mechanism by which the latter enhance film stability is still a matter of debate, in particular concerning the influence of surface elastic effects on the hydrodynamic boundary condition at the liquid/air interfaces. In the present work, "twin" hydrodynamic models ne...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2011