Search results: Found 2

Listing 1 - 2 of 2
Sort by
Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online]

Author:
ISBN: 3937300082 Year: DOI: 10.5445/KSP/812004 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Chemistry (General)
Added to DOAB on : 2019-07-30 20:01:59

Loading...
Export citation

Choose an application

Abstract

The investigation of the interfacial phase transitions in fluid systems with short-range intermetallic interactions are of great interest. The phenomena were studied in two systems exhibiting a liquid-liquid miscibility gap: at the fluid/wall interface in fluid KxKCl1-x and at the fluid/vacuum interface of the Ga1 xBix alloys. To characterize the interfacial changes of the ultra thin films (composition, thickness and their evolution with time) the spectroscopic ellipsometry was performed over a wide spectral range. Whereas in the experiments on KxKCl1-x an existing ellipsometer could be used, a completely new UHV-apparatus including the in-situ phase modulation ellipsometer had to be developed for Ga1 xBix alloys. For the KxKCl1-x system new results on complete wetting at solid-liquid coexistence as well as in the homogenous liquid phase (prewetting) are presented. The spectra show the typical F center absorption which indicates that the film is a salt-rich phase. The thickness strongly increases approaching the monotectic from 30 to 440 nm, which is in agreement with the tetra point wetting scenario. For this interpretation a quantitative description of the excess Gibbs energy has been developed. For the Ga1 xBix system the results on complete wetting, surface freezing and oscillatory interfacial instabilities are presented. The high-precision spectra have been recorded approaching the liquid-liquid miscibility. These spectra have been modeled using a Ga-Bi effective medium approximation for the substrate covered by a film of liquid Bi. The measurements give evidence of tetra point wetting in the Ga-Bi system. First ellipsometric study of the surface freezing in Ga-Bi has been performed. Within the miscibility gap a very interesting effect of surface and bulk oscillatory instability was observed. The details of this process at present are not well understood, but a qualitative description is given.

Synthesis and Modification of Nanostructured Thin Films

Author:
ISBN: 9783039284542 9783039284559 Year: Pages: 276 DOI: 10.3390/books978-3-03928-455-9 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-04-07 23:07:09
License:

Loading...
Export citation

Choose an application

Abstract

The Special Issue “Synthesis and Modification of Nanostructured Thin Films” highlights the recent progress in thin film synthesis/modification and characterization. New methods are reviewed for the synthesis and/or modification of thin films based on laser, magnetron, chemical, and other techniques. The obtained thin nanostructures are characterized by complex and complementary techniques. We think that most of proposed methods can be directly applied in production, but some others still need further elaboration for long-term prospective applications in lasers, optics, materials, electronics, informatics, telecommunications, biology, medicine, and probably many other domains. The Guest Editor and the MDPI staff are therefore pleased to offer this Special Issue to interested readers, including graduate and PhD students as well as postdoctoral researchers, but also to the entire community interested in the field of nanomaterials. We share the conviction that this can serve as a useful tool for updating the literature, but also to aid in the conception of new production and/or research programs. There is plenty of room for further dedicated R&D advances based on new instruments and materials under development.

Keywords

AlGaN --- nanopatterned sapphire substrate --- hydride vapor phase epitaxy --- stress --- transmission electron microscopy --- copper nanowires --- CuNWs --- degradation --- encapsulation --- PDMS --- PMMA --- solution-based --- transparent electrode --- photonic crystal fiber --- demultiplexer --- dense wavelength division multiplexing --- lithium niobate --- waveguide --- photonic integrated circuit --- propagation loss --- optical lithography --- chemo-mechanical polishing --- gold thin film --- nonlinear absorption --- nonlinear refraction --- transient absorption --- nanoparticles --- high-order harmonics --- electroluminescence --- nanolaminate --- Al2O3 --- Tm2O3 --- atomic layer deposition --- germanium --- DLC --- doped biomaterials --- pulsed laser deposition --- reactive oxygen species --- apoptosis --- cytotoxicity --- titanium film --- interlayer --- cohesion --- residual stress --- nano-indenter --- nanocrystal --- CdTe --- Cu-doped --- ZnTe --- solar cells --- solution processed --- pulsed laser deposition --- chalcogenide thin films --- Raman spectroscopy --- spectroscopic ellipsometry --- noble metal nanoparticles --- pulsed laser ablation --- surface enhanced Raman spectroscopy --- antiepileptic drugs --- Zn2+ substituted Coll-CaPs biomimetic layers --- MAPLE --- spin coating --- dye-sensitized solar cells --- photovoltaic conversion efficiency --- TiO2 thin films --- pulsed laser deposition --- DLC bio-functionality --- silicon doping --- diffusion barrier --- biocompatibility --- proliferation improvement --- endothelial cells --- ZnO nanofilms --- SHG --- Ga doping --- polarization angle --- Cu2MgxZn1?xSnS4 --- thin films --- photoelectric performance --- sol–gel --- sulfuration treatment --- solar cell --- nanomaterial --- zinc oxide --- barium titanate --- composite --- ethylene vinyl acetate --- elastic modulus --- toughness --- flexural rigidity --- radiopacity --- piezoelectricity --- laser surface texturing --- laser-induced periodic surface structures --- LIPSS --- silicon --- PTFE --- friction --- n/a

Listing 1 - 2 of 2
Sort by
Narrow your search