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Silver doped indium sulfide thin films were deposited on ordinary glass substrates at 350°C, using chemical spray pyrolysis (CSP) technique. The samples have been prepared by varying the Ag/In ratio in solution from 0 % to 4 %. The effect of silver on structural and optical properties of In2S3:Ag thin films has been investigated in detail using various characterization tools. XRD patterns confirmed...
In this work it is presented a photophysical study of thin films based on excited-state intermolecular proton transfer dyes 2-(4′amino-2′-hydroxyphenyl)benzoxazole (AHPBO) and 2-(4′aminophenyl)benzoxazole (APBO). The studied thin films were characterized by Raman Spectroscopy, Atomic Force Microscopy, as well as Photoluminescence and UV-Vis absorption spectroscopies. In addition, theoretical calculations...
The paper presents the synthesis as well as optical, structural and morphological characterization of CdS nanoparticles embedded in silico-phosphate thin films, as a promising luminescence temperature sensing material. The films were synthesized by sol-gel method, spin coating technique. UV-Vis (Ultraviolet-Visible) ellipsometric absorption is specific to CdS semiconductor nanoparticles with a cut-off...
β-In2S3 thin films doped by tin at different percentages were deposited by Chemical Spray Pyrolysis (CSP) method at 300 °C substrate temperature onto glass substrate. X-ray diffraction (XRD) was used to study structure, Raman spectroscopy analysis for phase, quality and structure, Scanning Electron Microscopy (SEM) for the surface morphology, Energy Dispersive X-Ray Spectroscopy (EDS) for the composition,...
In2S3 thin films were elaborated onto glass substrate by spray pyrolysis method using sulphur-to-indium ratio ([S]/[In]) of 3 and different substrate temperatures. The as-deposited and annealing films were characterized by X-Ray Diffraction (XRD) for the structural, Energy Dispersive Spectroscopy (EDS) for the composition, Raman spectroscopy for samples quality and optical transmittance to measure...
To control deposition profile of carbon films in trenches, we have studied substrate temperature dependence of deposition rate of carbon films and we have realized anisotropic deposition of carbon films in trenches above 250° deposited by CVD plasma of toluene diluted H2, in trenches. Here, we report dependence of properties of plasma CVD carbon films on substrate temperature.
In this paper we present results of structural and topographical studies of C-Ni nanocomposite films with different Ni content. Films were obtained by PVD method. Their structure was investigated by Raman and FTIR spectroscopy and topography by AFM. Typical field emission current from these films is few μA (up to 10 μA) for 3kV anode-cathode voltage and 0.1mm anode-cathode distance.
In this paper the effect of single nanosecond laser pulse irradiation on the microstructure and field emission (FE) properties of carbon films is studied. Amorphous carbon films are exposed to a single pulse of a 248 nm excimer laser with pulse width of 23 nsec and varying energies. Microstructural changes of the films are investigated by Raman spectroscopy, transmission electron microscopy and electron...
In this work, we report an efficient method of chemical vapour deposition, without use of any metal catalysts, for the successful synthesis of vertical graphene nanoflake films (GNFs) on Si substrate. Effects of the growth condition on the surface morphology, microstructure, and chemical composition of GNFs are characterized by using scanning electron microscopy, transmission electron microscopy,...
In this work optical and structural properties of vanadium (V) oxides in comparison with their structure have been presented. Thin films were deposited on silica substrates by plasma enhanced reactive magnetron sputtering process. After deposition manufactured films were annealed at 400°C in order to form V2O5 structure. Optical transmission measurements have shown that as-deposited film...
Summary form only given. Amorphous hydrogenated carbon (a-C:H) films provide low friction, extreme hardness, chemically inertness, and good biocompatibility. a-C:H films have been expected a surface modification coating to medical appliances. However, poor adhesion of a-C:H film onto medical instruments which is metallic material limits their application. In order to improve the adhesion, the most...
Multi-walled carbon nanotubes (MWCNTs) film have been analyzed by Raman spectroscopy to clarify the effect of a pulsed Nd: YAG laser heating. The MWCNTs film surface was flashed with the fundamental harmonic (?? = 1064 nm) or the second harmonic (?? = 532 nm) of a single pulse of Nd: YAG laser in the air. The dynamics of pulsed nanosecond laser heating process was simulated by the solution of the...
Non-hydrogenated high sp3 content diamond-like carbon (DLC) has been subjected to intensive research efforts over the last three decades owing to its superior material properties. By introducing some metals/dopants into DLC film during deposition, the microstructure and properties of the films can be further modified, where studies have demonstrated it as an effective method to reduce the internal...
A challenge in exploiting the electrical properties of graphene is the fabrication of large area thin films in a scalable and inexpensive manner. The lack of a reliable and simple graphite exfoliation procedure has hindered the possibility of making films starting from pure graphene. This paper presents a scalable manner to obtain films of pure graphene on virtually any substrate with reproducible...
Characterisation of C-Pd films composed of carbon and palladium nanograins and obtained in two-steps method is presented. Film obtained in first step exhibits multiphase structure composed of nanograins of fullerenes, amorphous carbon and palladium nanocrystals. This film is modified in CVD process. Final films has porous carbonaceous form. All films were studied by scanning electron microscopy (SEM),...
The effect of rapid thermal annealing on PEDOT-PSS films has been investigated by Raman spectroscopy. The analysis indicates the formation of an annealing-induced doping in the PEDOT structure, suggesting a modification of the electronic structure.
Boron-doped nanodiamond (NCD) films were synthesized on silicon substrates by microwave plasma chemical vapor deposition (MPCVD) technique. The effect of vacuum annealing on the field emission characteristics of NCD films has been investigated. The surface morphology and quality of films was characterized by scanning electron microscope (SEM) and Raman spectroscopy. The SEM images clearly reveal formation...
Results from an initial study on the preparation, microstructure, and optical and electrical properties of zinc nitride films are presented. Zinc nitride has a lower bandgap than ZnO and can be fabricated in a thin film form by sputtering and other methods. This material has a potential as a new semiconductor material in photovoltaic, optoelectronic and other applications, offering additional advantages...
A new technique based on an electrostatic-force-directed-self- assembly has been developed to deposit thin films of multi-walled carbon nanotubes (MWCNTs) on thin dielectric wires of 8-10 mm length and 500 mum diameter using corona-charging technique. The same technique has also been developed to self-functionalize the nanotubes via acid-free dry route. Functionalization of the film was achieved in...
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