Materials Literature
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A combined study of the magnetic properties of GdCrO4 , Jiménez-Melero, E, Gubbens, P C M, Steenvoorden, M P, Sakarya, S, Goosens, A, Réotier, P Dalmas de, Yaouanc, A, Rodríguez-Carvajal, J, Beuneu, B, Isasi, J, Sáez-Puche, R, Zimmerman, U, Martínez, J L
This paper involves the formulation of the C 0 finite elements incorporating the conventional mechanism-based strain gradient plasticity theory. Higher-order variables and consequently higher-order continuity conditions are not required allowing the direct applications of conventional plasticity algorithms in the exis…
The authors describe the operation of an electro-optical photoluminescence quenching device based on CdSe nanoclusters formed using sequential ion implantation of Cd+ and Se+ in thermally grown SiO2 on silicon. A sample geometry consisting of a semitransparent gold electrode on top and an ohmic contact to the p-doped…
A technique for direct experimental investigations of coupling between applied elastic stress and magnetic response in ferromagnetic shape memory alloys over the temperature ranges of paramagnetic to ferromagnetic and martensitic transformations has been developed, based on the inverse magnetostriction (Villary) effec…
A method of annealing thin films of indium tin oxide in vacuum is proposed using a direct electric current flow through the film. During annealing at a constant electric power, the film resistance, free electron density, and structure evolution were monitored in situ. In comparison with the conventional isothermal ann…
The authors have studied nonradiative energy transfer between semiconductor nanocrystals (NCs) placed in a Fabry-Pérot microcavity. The spectrally integrated fluorescence from a monolayer of single sized NCs in the cavity is enhanced by a factor of 4.8 compared to free space. For a monolayer of mixed sized NCs, the ac…
A new approach is presented for modeling perovskite frameworks with disordered Jahn-Teller (JT) distortions and has been applied to study the elastic response of the LaMnO3 structure to defects in the JT ordering. Surprisingly, antiphase domain boundary defects in the pattern of ordered JT octahedra, along the [110] a…
A novel high mobility transparent conductive oxide thin film, tungsten-doped indium oxide (IWO), has been successfully grown on conventional glass substrates by reactive direct current magnetron sputtering technique from a metallic target. Analyses of x-ray photoelectron spectroscopy and x-ray diffraction reveal that…
Ceria, CeO2, based materials are a major (active) component of exhaust catalysts and promising candidates for solid oxide fuel cells. In this capacity, oxygen transport through the material is pivotal. Here, we explore whether oxygen transport is influenced (desirably increased) compared with transport within the bulk…
The Landau-Ginzburg-Devonshire theory is used to study the effects of the strain gradient due to the epitaxial stresses in ferroelectric thin films sandwiched between two different substrates. The polarization in the film is found to be nonuniform, resulting in charge offsets and an asymmetric hysteresis response with…
A method is presented for quantifying oxygen diffusion behavior in a nanodevice fabricated using individual ZnO nanowire/nanobelt. A nanodevice was built using a single nanobelt. Defects are introduced into nanobelt during specific nanofabrication procedure. Then, after the device being exposed to atmosphere for sever…
This letter reports a study of charge distribution on single-walled carbon nanotubes. An atomistic moment method is proposed based on classical electrostatics theory and the results of analysis are compared with those obtained from ab initio approach. It is shown that the classical electrostatics is applicable to solv…
A new hybrid monitoring technique for chloride stress corrosion cracking (SCC) is proposed. It uses both the acoustic emission (AE) and corrosion potential fluctuation (CPF) techniques. This paper discusses the results of SCC tests on butt-welded Type 304 stainless steel pipes. The weld pipe suffered transgranular (TG…
In this study, the application of synchrotron radiation microprobe to the analysis of Co incorporation in Zn1−xCoxO is reported. From the Co and Zn fluorescence line intensity ratio, the Co concentrations were deduced. A combination of fluorescence mapping with x-ray absorption spectroscopic techniques made possible t…
Abstract One‐pot dual size‐ and shape‐selective synthesis of tetrahedral Pt nanoparticles is achieved using the pre‐prepared Pt nanoparticles as the ‘external seeds’, and controlling the slow diffusional growth under hydrogen reduction in the presence of PVP as the capping agent. Copyright © 2006 John Wiley & Sons…
The adsorption states and growth process of the first water (D2O) layer on Rh(111) were investigated using infrared reflection absorption spectroscopy, temperature programed desorption, and spot-profile-analysis low energy electron diffraction. Water molecules wet the Rh(111) surface intact. At the early stage of firs…
Field electron emission properties of individual diamond cone were investigated using a customized double-probe scanning electron microscope system. The diamond cone was formed by maskless ion sputtering process in bias-assisted hot filament chemical vapor deposition system. The as-formed sharp diamond cone coated wit…
Sensitive to TNT vapor: Porphyrin-doped silica films with bimodal porous structures, fabricated using a dual template approach, exhibit remarkable sensitivity towards traces of TNT vapour. These hierarchically structured nanocomposites serve as useful chemosensory materials for rapid detection of explosives (see pictu…
A lack of dependence of the Raman frequency of optical vibrational modes on excitation wavelength in polar nanosemiconductors was observed. This is in contrast to the earlier observed dependence in nonpolar nanomaterials: carbon nanotubes and Si nanowires. This difference has been ascribed to the different crystallogr…
Abstract Two Eu III mixed‐ligand complexes, namely [Eu(TTA) 3 (PBO)]and [Eu(TTA) 3 (PBT)] [TTA = 1,1,1‐trifluoro‐3‐(2‐thenoyl)acetonato, PBO = 2‐(2′‐pyridyl)‐1,3‐benzoxazole, and PBT = 2‐(2′‐pyridyl)‐1,3‐benzothiazole], have been synthesized. [Eu(TTA) 3 (PBO)] has been structurally characterized by single‐crystal X‐ra…