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June 28, 2023 (v1)PublicationUploaded on: July 1, 2023
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June 15, 2023 (v1)Publication
The roughness induced during glow-discharge optical-emission spectroscopy (GDOES) measurements has been reported to cause a loss of resolution during GDOES depth-profiling analysis. In this paper, we undertake for the first time a study of the dynamics of the surface morphology of chromium and titanium thin films (designed in mono and...
Uploaded on: June 16, 2023 -
June 27, 2023 (v1)Publication
The broadening effects found in the depth profiles of abrupt periodic multilayers obtained by Glow Discharge Optical Emission Spectroscopy (GDOES) have been modelled by assuming that the resulting absolute concentration profiles can be described by Gaussian functions of constant area (equal to that of the cross section of the individual layers)...
Uploaded on: July 1, 2023 -
July 4, 2023 (v1)Publication
This paper describes an investigation into the migration and coalescence of equilibrium bubbles in helium implanted copper. Using computer simulation methods, the results indicate that when the swelling averaged over the implant depth approached 12%, the subsequent migration and coalescence leads to the unexpected formation of relatively...
Uploaded on: July 5, 2023 -
June 26, 2023 (v1)Publication
We examine here the depth resolution (interface width) in elemental analysis and depth profiling of complex layer systems of three ion-probing techniques, each of which has pros and cons: • Rutherford backscattering spectrometry (RBS); • secondary ion mass spectroscopy (SIMS); and, • glow-discharge optical emission spectroscopy (GDOES). RBS is...
Uploaded on: June 27, 2023 -
July 3, 2023 (v1)Publication
In depth profile analysis by radio-frequency glow discharge optical emission spectroscopy (rf-GDOES) techniques, the depth resolution mainly depends on the roughening induced during the sputtering and the resulting crater geometry. In this work we have tried to isolate the contributions of the different effects that degrade the depth resolution...
Uploaded on: July 4, 2023 -
July 3, 2023 (v1)Publication
The crater shape effects in GDOES depth profiling of multilayer metal coatings, with an individual thickness layer >500 nm, studied in the foregoing paper, have been extended to the case of thinner layers (layer thickness <150 nm). The analysis of 10 bilayers of 70 nm chromium and 150 nm titanium showed an increased degradation of the...
Uploaded on: July 4, 2023 -
June 6, 2023 (v1)Publication
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Uploaded on: June 7, 2023 -
June 30, 2023 (v1)Publication
In most of the industrial applications of multilayer coatings, a detailed knowledge of the interlayer structure and the interfaces is needed. In comparison with standard surface analysis techniques (SIMS, XPS, AES, etc.), depth profiling by radio-frequency glow discharge optical emission spectroscopy (rf-GDOES) provides rapid information, with...
Uploaded on: July 1, 2023 -
June 13, 2023 (v1)Publication
ZnO is probably one of the most studied oxides since ZnO nanostructures are a very rich family of nanomaterials with a broad variety of technological applications. Although several chemical techniques offer the possibility to obtain such ZnO nanostructures, here we show that the controlled modification of the zinc surface by low-energy O2 +...
Uploaded on: June 15, 2023 -
June 26, 2023 (v1)Publication
An increasing amount of effort is currently being directed towards the development of new functionalized nanostructured materials (i.e., multilayers and nanocomposites). Using an appropriate combination of composition and microstructure, it is possible to optimize and tailor the final properties of the material to its final application. The...
Uploaded on: June 27, 2023 -
June 14, 2023 (v1)Publication
AgDLC coatings were deposited by magnetron sputtering in order to evaluate: i) the Ag nanoparticle size distribution along the coatings thickness and ii) the silver stability in DLC coatings. Four different coatings were deposited, two AgDLC nanocomposite coatings containing 20 at.% of Ag, with thicknesses of 250 nm and 1000 nm, a 250 nm AgDLC...
Uploaded on: June 15, 2023 -
June 23, 2023 (v1)Publication
In this work, we have studied the improvement on the oxidation resistance of AlCrN-based coatings by adding a subsurface titanium nitride barrier layer. Since oxidation is interrelated with the inward diffusion of oxygen into the surface of AlxCr1−xN (x = 0.70) coatings and the outward diffusion of Cr to the surface, the oxidation behaviour of...
Uploaded on: June 24, 2023 -
June 9, 2023 (v1)Publication
Two multilayer solar selective absorber coatings [Al/CrN0.95/Cr0.96Al0.04N1.08/Cr0.53Al0.47N1.12/Al2O3 (stack #1) and Cr0.96Al0.04N0.89/Cr0.62Al0.38N1.00/Cr0.53Al0.47N1.12/Al2O3 (stack #2)] were deposited on 316L steel by combining direct current (DC) and high power impulse magnetron sputtering (HiPIMS) technologies with the aim of increasing...
Uploaded on: June 10, 2023 -
June 29, 2023 (v1)Publication
Quantitative GDOES studies in protective coating materials (oxides, nitrides, oxynitrides, etc.) are severely limited by the lack of certified standards containing known amounts of oxygen and/or nitrogen. In this work, we propose an alternative method for nitrogen quantification using as calibration samples, a series of deposited nitride...
Uploaded on: July 1, 2023 -
June 15, 2023 (v1)Publication
The aim of this study was to verify the possible physical and chemical changes that may occur on the surface of Ag–TiCN coatings after exposure to the culture media used in microbiological and cytotoxic assays, respectively tryptic soy broth (TSB) and Dulbecco's modified eagle's medium (DMEM). After sample immersion for 24 h in the media,...
Uploaded on: June 16, 2023 -
June 19, 2023 (v1)Publication
Surface modification by means of wear protective and antibacterial coatings represents, nowadays, a crucial challenge in the biomaterials field in order to enhance the lifetime of bio-devices. It is possible to tailor the properties of the material by using an appropriate combination of high wear resistance (e.g., nitride or carbide coatings)...
Uploaded on: June 21, 2023 -
June 19, 2023 (v1)Publication
Zirconium carbonitride coatings with silver nanoparticles were produced by DC unbalanced dual magnetron sputtering system, using two targets, Zr and Zr/Ag in an Ar, C2H2 and N2 atmosphere. Stainless steel 316L and silicon (100) substrates were used for electrochemical and structural characterization, respectively. Silver was found to be well...
Uploaded on: June 21, 2023 -
June 30, 2023 (v1)Publication
Chromium nitride coatings have been deposited on silicon by magnetron sputtering in an Ar + N2 atmosphere at different bias substrate voltages. The poisoning effect has been studied monitoring the discharge voltage and total pressure. The chemical composition and crystalline structure have been analysed by Glow Discharge Optical Emission...
Uploaded on: July 1, 2023 -
June 21, 2023 (v1)Publication
A systematic study for the optimization of the deposition process of ZnO thin films grown by dc magnetron sputtering at room temperature was carried out using different oxygen partial pressures and deposition times. We have established a correlation between the oxygen partial pressure, the chemical composition and the crystalline structure of...
Uploaded on: June 23, 2023 -
June 20, 2023 (v1)Publication
In this work, we report the successful growth of ZnO nanostructured films by oblique angle magnetron sputtering deposition (OAD) from a Zn target in a mixture gas of Ar/O2. The film microstructure and the surface morphology of the samples were explored by HRSEM. The crystalline structure and the composition were determined by XRD and RBS,...
Uploaded on: June 21, 2023 -
June 27, 2023 (v1)Publication
Elemental in-depth analysis of the Y–Pd thin film under hydrogenation/dehydrogenation has been performed by Glow Discharge Optical Emission Spectroscopy (GDOES). This technique was able to detect qualitatively the changes in the composition of the layer, particularly the in-depth H and O distribution during hydrogen uptake and release. The...
Uploaded on: July 1, 2023 -
June 14, 2023 (v1)Publication
We determine the optical properties of nanocomposites comprising gold nanoparticles embedded in a titania matrix using spectroscopic ellipsometry. We then apply the spectral representation formalism due to Bergman, to extract the dielectric function of the individual gold nanoparticles (NPs). We show that analytical forms of the spectral...
Uploaded on: June 15, 2023