Solid on liquid deposition

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The recent decision by ITER to move from a Be to a W first wall has significant implications for material transport and deposition, and can be expected to lead to increased W layer growth rate in deposition regions, which may flake leading to plasma disruption. In this work a novel sputtering set-up was implemented in the Magnum-PSI linear plasma device to create W layers under ITER relevant conditions. A W plate was inserted into the plasma edge and biased to cause sputtering of W in an Ar plasma. This spu

Safe exploitation of high-enthalpy geothermal fields for energy production requires knowledge of the mechanical behavior of faults and the seismic cycle in the presence of hot, pressurized fluids. In geothermal reservoirs, fluids can exist in the liquid, liquid-vapor mixture, vapor, or supercritical fluid state. Here we investigate the frictional properties of simulated fault gouges derived from the main stratigraphic units present in Krafla Geothermal Field (Iceland) under realistic water temperature (Tf=1

The development of high-quality copper (Cu) thin films by atomic layer deposition (ALD) remains challenging due to a limited understanding of the reaction mechanisms that govern film growth and composition. To address this gap, in this study, time-of-flight mass spectrometry (TOFMS) was used to perform the first comprehensive in situ investigation of the surface reactions during Cu ALD, using dehydrated Cu(II) hexafluoroacetylacetonate (Cu(hfac) 2) (CAS 14781−45−4) and diethylzinc (DEZ, ZnEt 2) (CAS 557−20−

Formamidinium (FA) cations commonly used in perovskite semiconductors tend to form sym-triazine when sublimed in vacuum, a process that hampers the deposition process. Here we find that ammonia, when used as a carrier gas for formamidinium halides transport, cleaves the sym-triazine ring back to formamidinium, hence enhancing the deposition efficiency.

Light Induced Chemical Vapour Deposition (LICVD) of titanium dioxide thin films is studied in this work. It is shown that this technique enables to deposit locally and selectively a chosen crystalline phase with a precise controlled thickness at low substrate temperature, allowing even the use of polymer substrates. A home made LICVD reactor was set up, consisting of a main chamber in which the substrate was placed on a temperature controlled plate and could be irradiated perpendicularly through a window by

Monolayer adsorption of benzoic acid derivatives on activated oxide surfaces from solution and from the vapor phase are investigated with the view of modifying the work function of a conductive substrate. Para-substituted benzoic acids with a wide range of electrical dipoles allow adsorption to be followed by measuring the surface potential of the grafted substrates using the Kelvin probe technique. From the linear correlation between adsorbed molecular dipole and work function, it is possible to obtain the

Designing plasma-enhanced chemical vapour deposition (PECVD) reactors to coat large-area glass plates (similar to1 m(2)) for flat panel display or solar cell manufacturing raises challenging issues in physics and chemistry as well as mechanical, thermal, and electrical engineering, and material science. In such reactive glow discharge plasma slabs, excited at RF frequency (from 13.56 MHz up to similar to 100 MHz), the thin-film deposition uniformity is determined by the gas flow distribution, as well as the

This paper presents investigations of unsteady flow conditions influence over cavitation dynamics. Measurements of wall pressure fluctuations in a model turbine are first introduced. It is shown that the wake of the spiral casing tongue modulates cavity dynamics near the trailing edge of runner blades. A new device, which permits a 2D hydrofoil to oscillate around its mean incidence angle, is used in order to recreate flow conditions similar to those of blade row wakes experienced in industrial flows. This

All-fiber optical phase modulators were fabricated by coating standard telecommunication optical fibers with thin films of piezoelectric ZnO. Piezoelectric optical fiber coatings of PbZrxTi1-xO3(PZT) were also produced, and the actuation capability necessary for making optical fiber modulators is demonstrated. Both the ZnO and the PZT fiber coatings were deposited by reactive direct current magnetron sputtering of metal targets. The geometry of the sputtering system, fiber rotation, and reactive sputtering

Arterial vasomotion and its relation to intraluminal pressure were investigated in vitro in isolated rat arteries. Femoral arteries (mean diameter = 768.2 +/- 25 microns, n = 5) and mesenteric arteries (mean diameter = 393.4 +/- 32 microns, n = 5) were used in this study. Arterial segments were excised, mounted on microcannulas and perfused with Tyrode's solution at a constant flow (100 microliters/min). After equilibration, intraluminal pressure was stepwise changed from 0 to 120 mm Hg. The changes in the

Sn and Pt films were laser deposited on a quartz plate or C membrane supports by using light-induced thermal dissocn. and photodissocn. of SnMe4 and bis(hexafluoroacetylacetonato)platinum, resp. An Ar laser (l = 514.5, 455.5, 257.3 nm) and a Hg lamp (l = 253.7 nm) were used as the light sources. The structure and the formation of the metal films were investigated and the deposition rate was measured. A new method, based on the detn. of the vapor pressure, was introduced for measuring the deposition rate. Th

Solid on liquid deposition

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Growth, Characterization and Adhesion of Thick Deposited Tungsten Layers Under Transient Loading in Magnum-PSI

The Effect of Temperature and Physical State of Water on the Frictional Properties of Gouges from Krafla Geothermal Field (Iceland)

Reaction Mechanisms in Copper Atomic Layer Deposition Using Copper(II) Hexafluoroacetylacetonate and Diethylzinc via In Situ Time-of-Flight Mass Spectrometry

Ammonia-assisted vapour transport deposition of formamidinium salts for perovskite thin films

Selective light induced chemical vapour deposition of titanium dioxide thin films

Solution versus vapor growth of dipolar layers on activated oxide substrates

The physics of plasma-enhanced chemical vapour deposition for large-area coating: industrial application to flat panel displays and solar cells

The influence of flow unsteadiness on erosive cavity dynamics

Sputter deposited piezoelectric fiber coatings for acousto-optic modulators

Intraluminal pressure modulates the magnitude and the frequency of induced vasomotion in rat arteries

Structure and formation of metal film deposited by laser-induced dissociation