Materials Literature
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Highly uniform, single-crystalline PbTe nanorods with a diameter of 7 nm and an aspect ratio of 7 can be obtained by using a sonoelectrochemical method. The metal ion/ligand ratio controls the purity of the PbTe nanostructures through the redox chemistry of the ions involved in the growth process. Transmission electro…
Gold (Au) and quantum dot (QD) nanoparticles, which have been extensively used in many fields, were encapsulated with a natural polymer, chitosan, to improve their biocompatibility. Characterization was performed using ultraviolet-visible, dynamic light scattering, atomic force microscopy, and transmission electron mi…
Abstract Hollow latex cages (HLCs) are used as templates to fabricate composite hollow spheres with complex structures. The template HLCs have a polystyrene shell with transverse hydrophilic channels connecting to an interior hydrophilic surface. They are stable and permeable, and a reagent can be preloaded into the c…
The crystal structure of the solid solutions La 2 Mo 2 - y Cr y O 9 ( y ≤ 0.5) and La 2 Mo 2 - y W y O 9 ( y ≤ 1.4) has been studied using X-ray and neutron powder diffraction. These two series of lanthanum molybdates, which belong to the LAMOX family of fast oxide-ion conductors, exhibit a different structural behavi…
We investigate theoretically the nonequilibrium transport properties of carbon nanotube quantum dots. Owing to the two-dimensional band structure of graphene, a double orbital degeneracy plays the role of a pseudospin, which is entangled with the spin. Quantum fluctuations between these 4 degrees of freedom result in…
Foreword. Preface. List of Contributors. 1 Supercritical Carbon Dioxide for Sustainable Polymer Processes (Maartje Kemmere). 1.1 Introduction. 1.2 Strategic Organic Solvent Replacement. 1.3 Physical and Chemical Properties of Supercritical CO2. 1.4 Interactions of Carbon Dioxide with Polymers and Monomers. 1.5 Conclud…
The energy position of the optical absorption edge and the free carrier populations in InxGa1-xN ternary alloys can be controlled using high energy 4He+ irradiation. The blue shift of the absorption edge after irradiation in In-rich material (x > 0.34) is attributed to the band-filling effect (Burstein-Moss shift) due…
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The effect of doping Mo for Mn on the magnetic and transport properties of the colossal magnetoresistance material, La0.67Ba0.33MnO3, has been studied. Compounds of the series La0.67Ba0.33Mn1-xMoxO3 (x=0.0 to 0.1) have been prepared and found to crystallize in the orthorhombic structure (space group Pbnm). Energy Disp…
Epitaxial thin films of gallium iron oxide (GaFeO3) are grown on (001) silicon by pulsed laser deposition (PLD) using yttrium-stabilized zirconia (YSZ) buffer layer. The crystalline template buffer layer is in-situ PLD grown through the step of high temperature stripping of the intrinsic silicon surface oxide. The X-r…
While the dynamics of many complex systems is dominated by activated events, there are very few simulation methods that take advantage of this fact. Most of these procedures are restricted to relatively simple systems or, as with the activation-relaxation technique (ART), sample the conformation space efficiently at t…
The formation of a spanning hydrogen-bonded network of hydration water is found to occur via a 2D percolation transition in various systems: smooth hydrophilic surfaces, the surface of a single protein molecule, protein powder and diluted peptide solution. The average number of water-water hydrogen bonds nH at the per…
On microscopic and mesoscopic scales, plastic flow of crystals is characterized by large intrinsic fluctuations. Deformation by crystallographic slip occurs in a sequence of intermittent bursts (‘slip avalanches’) with power-law size distribution. In the spatial domain, these avalanches produce characteristic deformat…
We have investigated the resistive relaxation of a ${({\mathrm{La}}_{0.4}{\mathrm{Pr}}_{0.6})}_{1.2}{\mathrm{Sr}}_{1.8}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ single crystal, in order to examine the slow dynamics of the field-induced insulator-to-metal transition of bilayered manganites. The temporal profiles observed in r…
Structural phase transformations of [110] electric-field-cooled $\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}$-30%$\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ (PMN-30%PT) crystals have been performed by x-ray diffraction. A phase sequence of cubic $(C)\ensuremath{\rightarrow}$ tetragonal $(T)\ensure…
The modifications in the electronic structure of ${\mathrm{Ni}}_{2+x}{\mathrm{Mn}}_{1\ensuremath{-}x}\mathrm{Ga}$ by Ni doping have been studied using the full potential linearized augmented plane wave method and ultraviolet photoemission spectroscopy. Ni $3d$-related electron states appear due to formation of Ni clus…
Using a combination of statistical mechanics and finite-element interpolation, we develop a coarse-grained (CG) alternative to molecular dynamics (MD) for crystalline solids at constant temperature. The new approach is significantly more efficient than MD and generalizes earlier work on the quasicontinuum method. The…
We discuss the roles of continuum linear elasticity and atomistic calculations in determining the formation volume and the strain energy of formation of a point defect in a crystal. Our considerations bear special relevance to defect formation under stress. The elasticity treatment is based on the Green's function sol…
We have studied in detail the electronic structure and magnetism in M (Mn and Cr)-doped semiconducting half-Heusler compounds FeVSb, CoTiSb and NiTiSn (XY x M 1− x Z) in a wide concentration range using the local-spin density functional method in the framework of the tight-binding linearized muffin tin orbital method…
A method for forming permanent three dimensional structures from colloidal particles using holographic optical trapping is described. Holographic optical tweezers (HOT) are used to selectively position charge stabilized colloidal particles within a flow cell. Once the particles are in the desired location an electroly…