We report on the growth by evaporation under high vacuum of high-quality thin films of Fe(phen)2(NCS)2 (phen=1,10-phenanthroline) that maintain the expected electronic structure down to a thickness of 10 nm and that exhibit a temperature-driven spin transition. We have investigated the current-voltage characteristics of a device based on such films. From the space charge-limited current regime, we deduce a mobility of 6.5x10-6 cm2/V?s that is similar to the low-range mobility measured on the widely studied tris(8-hydroxyquinoline)aluminium organic semiconductor. This work paves the way for multifunctional molecular devices based on spin-crossover complexes

Organosilicon layers were deposited on galvanized steel to give a protective coating against corrosion. HMDSO was atomized and injected into a DBD plasma at atmospheric pressure. Plasma‐polymerized HMDSO layers were different when HMDSO nanodroplets reacted directly in the plasma area or when such droplets reacted with the plasma once deposited on the surface. Addition of a plasma curing step was also studied. Influence of the deposition method on the properties of ppHMDSO layers was also studied. Layer structure was measured by SEM and interferometry, and its chemical structure was analyzed by FTIR and XPS. Corrosion resistance, which was measured by electrochemistry, was significantly increased when a plasma curing step was performed.

Articles you may be interested inEffect of Fe incorporation on the optical behavior of ZnO thin films prepared by sol-gel derived spin coating techniques AIP Conf. Electron irradiation effects on electrical and optical properties of sol-gel prepared ZnO filmsThe present study focuses on the structural and optical properties of ZnO thin films fabricated by sol-gel process and spin coated onto Si ͑100͒ and quartz substrates. The ZnO films have a hexagonal wurtzite structure with a grain size of about 50 nm. The x-ray photoelectron spectroscopy measurements reveal the presence of Zn 2+ and of zinc hydroxyl groups at the film. Optical properties were studied by photoluminescence ͑PL͒ and absorption spectroscopy at low and room temperatures. The absorption spectrum is dominated by a sharp excitonic peak at room and low temperatures. At room temperature, PL observations show two transitions: one near the absorption edge in the ultraviolet ͑UV͒ region and the second centered at 640 nm, characteristic of the deep electronic levels in the bandgap. The spectrum at 6 K is dominated by donor bound exciton lines and donor-acceptor pair transitions. LO-phonon replica and two-electron satellite transitions are also observed. These optical characteristics are a signature of good structural quality of the films.

This work reports on organosilicon‐based coatings deposited by atmospheric plasma processes on aluminium‐zinc galvanization layers on steel in order to prevent corrosion. Hexamethyldisiloxane (HMDSO) is introduced as a precursor in an atmospheric pressure dielectric barrier discharge (DBD) plasma. Structure of the coating is evaluated by means of white light interferometry (WLI) and fourier transform infrared spectroscopy (FT‐IR) measurements. Anti‐corrosion properties are measured by means of electrochemistry testing and salt spray exposure. Admixtures of oxidizing gases in the plasma carrier gas enable faster deposition rate and more corrosion resistant organosilicon coatings.

Pyrite and/or galena particles previously conditioned with U(VI) at pH 6 have been characterized by micro-Raman spectrometry, voltammetry, scanning electron microscopy and high resolution X-ray photoelectron spectroscopy. U

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A wood-free resin pencil comprised of a lead made of graphite particles dispersed in a polymeric matrix is proposed as a convenient low-cost electrode for the Voltammetry of Microparticles technique instead of paraffin impregnated graphite rods. The pencil electrode was successfully applied for the characterization of insulating (Prussian blue, zeolites) and conductive (silver selenide, pyrite) microparticles in various media. The voltammetric responses were comparable to, sometimes even better than, those obtained with applying other electrochemical techniques.

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