Materials Literature
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Exploration of the Ca-Ga-Nb-O phase diagram by solid-state reaction in air led to isolation of Ca4GaNbO8. The crystal structure was determined ab initio by synchrotron X-ray and high-resolution neutron powder diffraction. Ca4GaNbO8 adopts a heavily distorted oxygen-deficient perovskite structure with the rare feature…
We demonstrate control of the magnetoresistance of Co/Cu/Fe giant magnetoresistance structures on BaTiO3(001) by electric field. The magnetoresistance clearly increases with electric field strength in the three different ferroelectric phases of BaTiO3, while the electric field dependence is more significant in the ort…
The fabrication of tetraphenyl porphyrin (TPP)–silver nanoparticle (AgP) composite films on indium–tin oxide (ITO) electrodes was carried out by the electrostatic layer-by-layer adsorption technique. Maximum enhancement in photocurrent action spectra as well as in fluorescence emission spectra was observed at an immer…
The buoyancy concept is critically re-examined for applications to dispersions of nano-particles, such as colloids, proteins, or macromolecules. It is shown that when the size of the buoyant particle is not too different (say, at most a factor of ten) from the size of the dispersed particles, new intriguing phenomena…
Retardation effects in the valence electron energy-loss spectrum (EELS) of a Si slab are analyzed by angular-resolved EELS. The dispersion curves of the valence spectra excited in a slab are directly observed from a specimen area with several different thicknesses and are interpreted by performing a calculation of the…
The chemical interactions and spin structure of (O2)4 in its ground singlet state are analyzed by means of Quantum Chemical Topology descriptors. The energetic contributions of the Interacting Quantum Atoms approach are used to obtain information about the class of interactions displayed along the dissociation path of…
A series of Au/-TiO 2 with various Co/Ti ratios prepared. /TiO 2 was prepared by incipient wetness impregnation with aqueous solution of cobalt nitrate. Au catalysts were prepared by deposition-precipitation (DP) method at pH 7 and 338 K. The catalysts were characterized by inductively coupled plasma-mass spectrometry…
We report the evolution of superconductivity and the phase diagram of the K x Fe 2− y Se 2− z Te z ( z = 0–0.6) crystals grown by a one-step synthesis. The one-step synthesis is much simpler than a conventional process to grow the K x Fe 2− y Se 2 system. No structural transition is observed in any crystals, while lat…
The present work describes the piezoelectric, impedance, and conductivity studies of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M3"><mml:msub><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mtext>Na</mml:mtext></mml:mrow><mml:mrow><mml:mtext>0</mml:mtext><mml:mtext>.5<…
Li ion containing oxynitride amorphous thin films are promising materials for electrochemical applications due to their high ionic conductivity, mechanical stability and chemical durability. Here we report on the preparation of Li boron-oxynitride (LiBON) amorphous thin films by rf sputtering of Li-diborate and Li-pyr…
Pipes of 3003/4043 clad aluminum alloys are used in air conditioning systems and are exposed to flowing relatively high‐temperature solutions (353 – 373 K). In the present investigation, the corrosion behavior of pure aluminum and 1050‐, 3003‐, and 4043‐aluminum alloys was examined by immersing in 1.57 × 10 −3 kmolm −…
Au nanoparticles (AuNPs), which easily aggregate in organic thin film, are observed to well-disperse in chicken albumen thin films. The incorporated AuNPs is distributed uniformly inside the thin film and is as dense as 650 (particles/μm(3)). In addition, enhanced ultraviolet (UV) fluorescence centered at 350 nm is ob…
The compound [4'-CF3bzPy][Ni(mnt)2] (1) (where 4'-CF3bzPy = 1-(4'-(trifluoromethyl)benzyl)pyridinium and mnt(2-) = maleonitriledithiolate) was synthesized and displays a magnetic bistability with a surprisingly large thermal hysteresis loop (~49 K). X-ray crystallographic studies reveal that in the high-temperature (H…
Abstract We have studied the stable end phase formed in amorphous germanium (a‐Ge) films that have been subjected to a pressure‐induced phase transformation under indentation loading using a large (20 µm) spherical indenter. After indentation the samples have been annealed at room temperature to remove any residual un…
Regularities of static and cyclic deformation, damage and fracture of heat-resistant steel 25Kh1M1F, based on the approaches of physical mesomechanics and 3D interferometry method, are presented in this paper. The applicability of these techniques for different hierarchy levels of deformation was studied. The investig…
Opposing polymer brush layers at high grafting density were examined under confinement and characterized with respect to structure and interaction forces using molecular dynamics simulations in an explicit solvent. The brush system underwent a static compression, where the system is simulated at several discrete separ…
Magnetism and multiplets for metal-phthalocyanine (MPc) molecules with transition-metals (M) of Mn and Co were investigated based on the constraint density functional theory calculations by imposing density matrix constraint on the d-orbital occupation numbers. For the MnPc, the ground state is found to be the 4Eg sta…
In this paper, we have investigated the magnetism of multiferroic CoCr2O4. With decreasing temperature, CoCr2O4 first undergoes a ferrimagnetic transition at TC then a long-range spiral spin transition at TS followed by a magnetic lock-in transition at TL. Coercive force manifests different slopes in different magneti…
In the present work, the robustness of an anodizing process was tested. Important anodizing parameters such as the anodizing potential, the dwell time at the anodizing potential, and the bath temperature were varied. The influence of the parameter variation on the microstructure of the oxide layers was investigated by…
Core–shell (CS) CdSe/ZnS quantum dots (QD) capped with ligands that possess a mercapto or an amino group and a naphthalimide (NI) as chromophore unit, linked by a short ethylene chain (CS@S–NI and CS@H 2 N–NI, respectively), have been synthesized and fully characterized by infrared and nuclear magnetic resonance spect…