Showing papers in "Applied Surface Science in 2002"

TL;DR: In this article, X-ray photoelectron spectroscopy (XPS) was used to investigate the valence state of cerium in unsupported composite Ce x Mn 1− x O 2− y catalysts.

TL;DR: In this paper, a review of results on nanoparticles formation under laser ablation of Ag, Au, and Ti solids targets in liquid environments (H 2O, C 2H5OH, C2H4Cl2, etc.).

TL;DR: In this paper, a quantitative disagreement of the efficiency of self-absorption on both the ablation efficiency and particle size with the absorption intensity of colloid was discussed on the basis of dynamic change in the morphology of colloids.

TL;DR: In this paper, the authors measured the corrosion rates in the presence of mimosa tannin as a low carbon steel corrosion inhibitor in sulfuric acid media, in the range of temperatures from 20 to 60°C.

TL;DR: In this article, the authors observed a complex structure of fine ripples at the bottom of the ablated crater, which are oriented perpendicular to the beam polarization, and they assumed that the ripples structures are due to self-organization structure formation during the relaxation of the highly nonequilibrium surface after explosive positive ion emission.

TL;DR: In this article, a spray pyrolysis technique was employed to deposit nickel oxide (NiO) thin films from hydrated nickel chloride salt solution on to glass substrates, and the effect of the volume of sprayed solution on structural, optical and electrical properties was studied using X-ray diffraction (XRD), infrared (IR), optical absorption, electrical resistivity and thermoelectric power (TEP) techniques.

TL;DR: In this paper, a review of laser-induced material processing is presented with special emphasis on recent achievements mainly obtained by the Linz group, such as using optical fiber tips for nanoscale photophysical etching, the pulsed-laser deposition of thin films of high-temperature superconductors and polytetrafluoroethylene (PTFE), and the laser cleaning of surfaces.

TL;DR: In this article, the surface properties of polypropylene (PP) films using an air dielectric barrier discharge was studied using atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and contact angle measurement.

TL;DR: In this article, the Tafel extrapolation method was used to derive corrosion potentials (E corr ), corrosion current densities ( i corr), surface coverage degrees ( θ ), and corrosion inhibition efficiencies ( η, %).

TL;DR: In this paper, a laser ablation of a target immersed in various concentrations of NaCl solutions as well as in neat water was examined by analyzing the absorbance and peak shape of the target.

TL;DR: In this paper, a systematic investigation into the effects of process parameters on the growth kinetics and associated changes in the structure, phase composition and mechanical properties of surface layers formed on Ti-6Al-4V alloy by plasma electrolytic oxidation (PEO) treatment in 0.05-0.2 mol l−1 solutions of sodium aluminate.

TL;DR: The structural, electrical and optical properties of ZnO:Al films prepared by rf magnetron sputtering have been characterised in this paper, which shows that the films are highly oriented with their crystallographic c-axis perpendicular to the substrate almost independent on Ar pressure.

TL;DR: In this paper, the effects of Ag doping on the microstructure and photocatalytic activity of TiO 2 films prepared by sol-gel method were studied by means of X-ray diffraction.

TL;DR: In this paper, the optical and electrical properties for highly c-axis oriented ZnO films deposited on Si (0, 0, 1) and quartz substrates by pulsed laser deposition (PLD) under various deposition conditions such as substrate temperature, laser fluence and oxygen ambient pressure.

TL;DR: In this article, three different ablation thresholds were distinguished in all metals, i.e., 0.018, 0.18, and 0.25 J/cm2, and the lowest ablation threshold was of one order of magnitude lower than the one observed previously.

TL;DR: In this paper, the pore condensation and hysteresis behavior of nitrogen and argon was studied on well-defined, ordered porous materials like MCM-48, MCM41 silica (mode pore diameters, 2-5nm) and SBA-15 (6.7

TL;DR: In this paper, a transparent TiO 2 thin film was successfully prepared on glass substrates by using spray pyrolysis technique, and the films were amorphous at deposition temperatures up to 450°C.

TL;DR: In this article, the performance of hardfaced material was evaluated by microstructure, chemical analysis and microhardness measurements, and results showed that for operating conditions that do not require elevated temperature, laser hardfacing shows the best results, due to the refine solidification structure produced.

TL;DR: In this article, two activated carbon cloths (ACCs) were investigated in terms of porosity parameters (BET specific surface area, percentage of microporosity) and chemical characteristics (acidic surface groups, acidity constants, point of zero charge).

TL;DR: Semiconducting stoichiometric copper sulphide (Cu2S) thin films were deposited using modified chemical deposition method in this article, where the preparation conditions such as concentration, pH of cationic and anionic precursors, adsorption, reaction and rinsing time durations, complextant, etc.

TL;DR: In this article, two composites between anatase-type TiO2 and carbon were prepared, i.e., carbon-coated and carbon-mounted exfoliated graphite, which showed effective photocatalytic activity for methylene blue decomposition.

TL;DR: In this article, ZnO thin films were deposited on sapphire (0 0 0 0 1) substrates with various thicknesses using a pulsed-laser deposition (PLD) technique in order to investigate the structural and optical properties of the films.

TL;DR: In this article, a femtosecond laser ablation of wide bandgap insulators (BaF2 and CaF2) was performed on a non-equilibrium surface.

TL;DR: In this article, the authors investigated the ultrafast laser ablation of silicon and determined the thresholds of melting and ablation for two different pulse durations τ = 20 and 500fs.

TL;DR: In this article, thin films of 3,4,9,10-perylenetetetracarboxylic dianhydride (PTCDA) were used as an interlayer for the electronic modification of Ag/ n -GaAs(100) Schottky contacts.

TL;DR: In this article, the authors used the energy loss spectra of photoexcited electrons from core levels such as O 1s to measure the energy bandgaps of very thin insulators.

TL;DR: In this paper, the synthesis of selenium nanoparticles by pulsed laser ablation using a YAG laser at 532nm was reported, and the nanoparticles were deposited on three different substrates: metallic gold films, silicon wafers and glass, and subsequently visualized and characterized by atomic force microscopy.

TL;DR: It is demonstrated that femtosecond laser ablation offers a tool for crack-free generation of cavities in dental tissue and spectral analysis of the laser induced plasma has been used to indicate carious oral tissue.

TL;DR: A bench-top laser-induced breakdown spectroscopy (LIBS) system has been used in the examination of pottery, jewelry and metal artifacts found in archaeological excavations in central and eastern Crete, Greece.

TL;DR: In this paper, the surface characterization of artificial patina layers on five different copper alloys was described using light microscopy, scanning electron microscopy with energy dispersive X-ray micro analysis (SEM-EDX) and Fourier transform infrared spectroscopy (FTIR).