Carbon nanotubes (CNTs) have been under scientific investigation for more than fifteen years because of their unique properties that predestine them for many potential applications. The field of nanotechnology and nanoscience push their investigation forward to produce CNTs with suitable parameters for future applications. It is evident that new approaches of their synthesis need to be develope...

A prism coupling method was used to measure the ordinary (no) and extraordinary (ne) refractive indices of AlxGa12xN films, grown by hydride vapor phase epitaxy ~HVPE! and metalorganic chemical vapor deposition ~MOCVD! on sapphire, at several discrete wavelengths from 442 nm to 1064 nm. In addition, spectroscopic transmittance and reflectance, correlated with the prism coupling results, were us...

Lines of TiSi, were written on Si(100) substrates by using a focused Ar+-laser. The reaction gas mixture consisted of TiCl, and H, and the substrate was used a s the silicon source. The laser deposited TiSi, lines were examined as a function of the deposition parameters. Especially the initial reactions have been studied b varying the the writing speed in a wide range. The C-54 phase of TiSi, w...

We report the self-assembly of core–shell GeTe/Sb2Te3 nanowires (NWs) on Si (100), and SiO2/Si substrates by metalorganic chemical vapour deposition, coupled to vapour–liquid–solid mechanism, catalyzed Au nanoparticles. Scanning electron microscopy, X-ray diffraction, micro-Raman mapping, high-resolution transmission energy loss spectroscopy were employed investigate morphology, structure, comp...

Epitaxial layers of p-type indium phosphide (InP) have been grown by low pressure, metal organic chemical vapour deposition (LP-MOCVD) using diethylzinc (DEZn) as the p-dopant source. Proposed zinc-associated InP point defects and experimental DEZn doping data were used to formulate a point-defect equilibrium model of the Zn doping process of MOCVD InP. The model equation is contrasted with the...

In this work a methodology to fabricate carbon nanotube based electrodes using plasma enhanced chemical vapour deposition has been explored and defined. The final integrated microelectrode based devices should present specific properties that make them suitable for microelectrode arrays applications. The methodology studied has been focused on the preparation of highly regular and dense vertica...

Since the introduction of electron beam (EB) physical vapour deposition (PVD) thermal barrier coatings (TBCs) and their application to moving components in the hot gas stream, erosion has become a prime concern. EB PVD TBCs, due to their unique columnar microstructure are far more strain tolerant than their plasma sprayed (PS) counter parts and can thus be used under more exacting operating con...

A series of novel one-dimensional carbon nanomaterials have been synthesized on an alkali-element-modified Cu catalyst, via a simple chemical vapour deposition method. The alkali-element doping of the Cu catalyst plays a key role in the controllable synthesis of carbon nanomaterials, signifying a novel approach to modifying the Cu catalyst. Owing to their unique morphology and fine quality, the...