Materials Literature
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Abstract In this paper the effect of solvents of different polarity (chloroform and acetone) on the geometry and static electric properties (dipole moment, polarizability, and first hyperpolarizability) of four nonlinear optical (NLO) chromophores is studied within the framework of the Polarizable Continuum Model (PCM…
Zinc oxide nanopillars with a single crystalline structure on the indium tin oxide substrate were prepared by using an electrodepositing process in lower concentrations of aqueous and 0.1 M KCl solutions. Surface structure and crystal orientation of the prepared ZnO films were characterized by scanning electron micros…
The complexes [Ce(tmtaa)2], [Ce(tmtaa)(tmtaaH)] and [Ce2(tmtaa)3(thf)2] are obtained from Ce[N(SiMe3)2]3 and tmtaaH2, the macrocyclic ligand 6,8,15,17-tetramethyldibenzotetraaza[14]annulene, depending on the stoichiometry, solvent and temperature. The crystal structure of Ce(tmtaa)2 is isostructural with Zr(tmtaa)2, h…
To avoid or damp out ferroresonance in inductive and capacitive voltage transformers, a few ferroresonance damping methods have been proposed and used in these instruments. In this paper, some of the suppressing circuits are reviewed. Specifications of these circuits and the effects of various parameters on their perf…
Films of copper(I) nitride were deposited by atomic layer deposition (ALD) using copper(II) hexafluoroacetylacetonate, water, and ammonia as precursors. Introduction of a water pulse in the ALD cycle was found to be crucial for initiating film growth on both amorphous Si O 2 and single-crystalline α - Al 2 O 3 ( 001 )…
Three procedures for the chemical oxidative polymerization of diphenylamine, namely, in solutions of sulfuric acid, in an H 2 SO 4 - tert -butanol mixture, and via the interfacial process, are considered. It was shown that the highest molecular mass products are formed by the interfacial process. Oxidative hydrolysis…
Reaction of MnCl2 with a non-innocent ligand H3L results in an unprecedented mixed-valence trinuclear complex [MnII MnIII MnIV (L)(L*)2(L(IQ))Cl] whose structural and magnetic properties are described.
To clarify the behavior of the formation of boron nitrides in P122 heat resistant steel containing 0.003 mass% B and 0.06 mass% N, the influence of heat treatments, remelting and hot working were investigated by SEM observations on boron nitrides at the fractured surfaces of the steel samples and by the EDS analysis.B…
We demonstrate that crystalline thick films up to thick can be synthesized by radio frequency (rf) sputtering using a vanadium target and without any postannealing treatment. Crystalline deposits in the range thick exhibit a rough surface morphology and a high porosity, allowing the electrolyte to penetrate the active…
A direct experimental evidence of electron accumulation in the grain boundary of yttria-doped (2.44 and ) zirconia ceramics with the grain size of about is demonstrated. Upon introducing extra electrons into the yttria-doped sample by reduction, its specific grain boundary resistivity decreased significantly compared…
An unprecedented M(II)2Pc3 (M = Cd) triple-decker sandwich complex has been synthesized and characterised by single crystal X-ray crystallography; cyclic voltammetry shows an unusually large range of redox states and EPR spectroscopy indicates that the material exists in at least two redox states, one having spin (1/2…
Although cationic surfactants are of general interest for a variety of consumer and biomedical applications, only a limited number of partially fluorinated, single-tailed, cationic surfactants have been synthesized. To study the potential usefulness of fluorinated cationic surfactants for these applications we synthes…
Abstract Large‐area cubic boron nitride/nanocrystalline diamond (cBN/ND) composite films were deposited on silicon substrates using plasma‐assisted (PA) CVD processes, and a systematic study of their mechanical properties was carried out. The direct growth of cBN on ND without an amorphous and turbostratic BN interfac…
The binding of two cationic europium complexes to a differentially phosphorylated insulin receptor peptide has been studied by emission spectroscopy and (31)P NMR and (1)H NMR TOCSY methods. Analysis of the europium emission and NMR spectral data was consistent with the presence of species in slow exchange on the NMR…
ABSTRACT The fracture behaviour of a ceramic multi‐layer designed with thin internal compressive layers and obtained by slip casting is studied. It consists of nine alternated Al 2 O 3 –5vol%tZrO 2 and Al 2 O 3 –30vol%mZrO 2 layers of 530 μm and 100 μm thickness, respectively. Mechanical characterization includes eval…
The phase transition of Zr1-xHfxV2O7 (x=0-1) solid solutions substituted for Zr(IV) sites was investigated using X-ray diffraction, TMA and DSC methods. X-ray diffraction experiments revealed that all compositions of Zr1-xHfxV2O7 (x=0-1) were of a single phase having a cubic structure. Lattice parameters of Zr1-xHfxV2…
Dodecanuclear Mn clusters based on edge-sharing bioctahedra display the scan-rate- and temperature-dependent hysteresis loops that are indicative of single-molecule magnetism behaviour.
An optimized synthetic approach has been developed for the exclusive formation of facetted silica tubes using a simple organic molecule i.e. ammonium tartrate as a template. The synergy of two phenomena: (a) aggregation of ammonium tartrate and (b) interaction of a hydrolysed TEOS intermediate with the ammonium tartra…
The scope of this study was to compare the plasma damage produced on porous dielectrics by different chemistries under identical plasma conditions and evaluate different techniques for characterization of the damage. We have investigated the effects of He + H 2 , N 2 + H 2 , and N H 3 plasmas on the properties of thre…
The novel paramagnetic and chiral anion [Fe(C5O5)3]3- has been combined with the organic donor BEDT-TTF (= ET = bis(ethylenedithio)tetrathiafulvalene) to yield the first chirality-induced alpha phase and a paramagnetic metal.