Materials Literature
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In this paper we present an extensive study of the electronic, magnetic, and transport properties of finite and infinite periodic atomic chains composed of carbon atoms and $3d$ transition metal (TM) atoms using first-principles methods. Finite-size, linear molecules made of carbon atomic chains caped with TM atoms, i…
Abstract Most rubber articles are prepared from filler‐elastomer compounds and dynamic mechanical data can give valuable insight into behavior of such systems. The aim of this study was to compare complex tensile modulus E * and complex shear modulus G * using seven types of vulcanized filled rubbers and two testing d…
We introduce a diffuse-interface approximation for solving partial differential equations on evolving surfaces. The model of interest is a fourth-order geometric evolution equation for a growing surface with an additional diffusive adatom density on the surface. Such models arise in the description of epitaxial growth…
This paper describes the development of a novel silicon (Si) cantilever beam device actuated by titanium–nickel (Ti–Ni) shape memory alloy (SMA) films. A Ti–Ni SMA film can yield high work output per unit volume, so a Ti–Ni film-actuated Si cantilever beam device is a prospective tool for use as a microelectromechanic…
Specific metal deposition on nanoparticles is of outstanding importance in molecular construction as well as for signal enhancement in bioanalytics. To characterize the growth mechanism we studied the enhancement process of immobilized gold nanoparticle ensembles at single particle level by atomic force microscopy, mo…
The catalytic activity of metal silicide for carbon nanotube (CNT) nucleation and growth is reported by systematically evaluating CNT synthesis on different metal silicide phases compared with pure metal catalysts. Using a combination of high-resolution microscopy, x-ray diffraction (XRD) and x-ray photoelectron spect…
We study the water octamer in a uniform electric field using the all-exchanges parallel tempering Monte Carlo method in the canonical ensemble. The heat capacity, quenched energy configurations, and the order parameter Q(4) are employed to understand the phase changes observed as a function of temperature and the stre…
We have studied the oxidation and reduction kinetics of Pd nanoparticles on Fe 3 O 4 as well as the CO oxidation kinetics on partially oxidized Pd nanoparticles. The structural properties of the Pd/Fe 3 O 4 model catalyst as well as its adsorption behavior have been studied in detail previously. Here we present the re…
Hoch aktive Dimetallkatalysatoren sind Pt-Co-Nanopartikel auf Yttriumoxid-stabilisiertem Zirconiumoxid (YSZ; siehe Bild), die in einem Schritt durch Coimprägnieren erhalten werden. Sie zeigen eine hohe katalytische Aktivität bei der selektiven Oxidation von CO in Gegenwart von Wasserstoff im Überschuss unterhalb 423 K.
A three-step method combining physical vapour deposition, grazing ion milling and thermal annealing techniques for large-area fabrication of nanodot arrays in anodic alumina oxide (AAO) templates is demonstrated. By this method, ordered arrays of Ni and Au nanodots with highly uniform diameters and a density of 1.2 ×…
The structural and magnetic properties of air sintered and Ar and O2 annealed La0.875Sr0.125Mn1−γO3+δ polycrystalline samples have been studied systematically. From the simultaneous refinement of room-temperature x-ray and neutron powder diffraction data, we have found that the crystal structure is orthorhombic (Pbnm,…
The Y-shaped π systems in trinuclear cyanines can, through a formal two-electron transfer, form a core methylenecyclopropane unit with three shorter, isolated π systems (see picture). Studies of the spectroelectrochemistry verify the reversibility of this redox reaction, which has an unusually pronounced electrochromi…
Possible reappearance of the charge density wave transition in MxTiSe2 compounds intercalated with 3d metals, Baranov, N V, Maksimov, V I, Mesot, J, Pleschov, V G, Podlesnyak, A, Pomjakushin, V, Selezneva, N V
A large-scale computational and statistical strategy is presented to investigate the development of plastic strain heterogeneities and plasticity induced roughness at the free surface in multicrystalline films subjected to cyclic loading conditions, based on continuum crystal plasticity theory. The distribution of pla…
Abstract Summary: The graft polymerization of styrene and (meth)acrylic monomers via ATRP from cross‐linked rubber particles, produced by recycled tires (“ground tire rubber”, GTR), is reported. GTR particles, obtained by cryogenic grinding process, still contain CC unsaturations on the surface, which were first oxid…
This study develops a continuum theory of small-deformation single crystal plasticity that includes ‘strain gradients’ and ‘strain rate gradients’ in the spirit of our recent papers (Gurtin and Anand 2005a, 2005b) for isotropic plasticity. Specifically, we develop a constitutive theory that allows for energetic micros…
In non-close-packed crystalline lattices, e.g. bcc metals and intermetallics, the stress-state dependence of the Peierls barrier for the motion of a screw dislocation violates Schmid's law and leads to non-associated plastic flow in single crystals and polycrystalline aggregates (Bassani 1994 Adv. Appl. Mech. 30 191–2…
Polyaniline (PANI) nanofibre films were fabricated on an indium–tin oxide (ITO) glass substrate through a controlled electropolymerization process. The PANI nanofibres grow vertically on an ITO substrate and are tapered, with average diameters of 20 and 15 nm for the base and top, respectively. The influence of the el…
The diameter dependent magnetoresistance of a single Ni nanowire (i.e. 200 and 30 nm diameter) bridging microfabricated Ni electrodes was investigated at temperatures ranging from 10 to 300 K. Overall, the magnetotransport behaviour of single Ni nanowires was similar to the results for thin films, except that the magn…
FeNi3/(Ni0.5Zn0.5)Fe2O4 nanocomposite particles were successfully synthesized using the hydrazine reduction combined with ammonia co-precipitation ferrite coating method. The x-ray and transmission electron microscopy analysis showed that face-centred cubic-structured FeNi3 nanoparticles were coated with spinel Ni–Zn…