Materials Literature
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The effect of ZnO on the crystal structure, sintering behavior, and electrical conductivity of yttrium‐doped BaCeO 3 –BaZrO 3 was investigated by unfixing or fixing the yttrium content noted as BaCe 0.5 Zr 0.3 Y 0.2− x Zn x O 2.9−0.5 x and BaCe 0.5 Zr 0.3 Y 0.2 O 2.9 + y ZnO, respectively. Studies on the two series re…
This paper describes a new approach for synthesis of branched flowerlike silver (Ag) nanostructured particles. These particles are characterized to ascertain their surface enhanced Raman scattering (SERS) property and antibacterial activity. The branched silver nanoflowers (SNF) are obtained using a biofriendly molecu…
LiBH 4 is one of the promising candidates for hydrogen storage materials because of its high gravimetric and volumetric hydrogen capacity. However, its high dehydrogenation temperature and limited reversibility has been a hurdle for its use in real applications. In an effort to overcome this barrier and to adjust the…
Crystal structure, lattice dynamics, and bonding environments of RbMgH 3 and RbCaH 3 were investigated using neutron powder diffraction (NPD), neutron vibrational spectroscopy (NVS), and first-principles calculations. RbMgH 3 exhibits a 6H-BaTiO 3 -type hexagonal perovskite structure, and RbCaH 3 forms a Pm-3m simple…
Abstract An optical photobleaching method has been used to measure the segmental dynamics of a poly(methyl methacrylate) (PMMA) glass during uniaxial creep deformation at temperatures between T g − 9 K and T g − 20 K. Up to 1000‐fold increases in mobility are observed during deformation, supporting the view that enhan…
The biocompatibility and biodegradability of natural silk fibres and the benign conditions under which they (with impressive mechanical properties) are produced represent a biomimetic ideal. This ideal has inspired people in both academia and industry to prepare silk-mimetic polymers and proteins by chemical and/or bi…
The electromagnetic characteristics ofplane-transformedinvisibility cloaks are quantitatively studied in this paper. We take elliptical cylindrical cloak as the example, and use an elliptical cylindrical wave expansion method to obtain the scattered field. It is demonstrated that an ideal elliptical cylindrical cloak…
Hybrid materials were synthesized by grafting polymer chains from the surface of ordered mesoporous silica (OMS) particles via surface-initiated atom transfer radical polymerization (SI−ATRP) of methyl methacrylate or styrene. Various types of OMS particles were used as substrates: micrometric particles with ill-defin…
The observation of the local - mode vibration, the two - mode behavior of the LO phonons at large isotope concentration, as well as large line broadening in LIH - D mixed crystals directly evidence strong additional phonon scattering due to the isotope - induced disorder.
An isotropic interaction potential for classical particles is devised in such a way that the crystalline ground state of the system changes discontinuously when some parameter of the potential is varied. Using this potential we model martensitic transformations, and are able to study in detail the processes that are u…
Assembling quantum dots (QDs) into nanoscale configurations over macroscopic dimensions is an important goal to realizing their electro-optical potential. In this Rapid Communication, we present a detailed study of a pentylcyanobiphenyl liquid crystal (LC) and a CdS QD colloidal dispersion by probing the dielectric pr…
We present the layer-by-layer assembly of an electroactive polymer nanocomposite thin film containing cationic linear poly(ethyleneimine) (LPEI) and 68 vol % anionic Prussian Blue (PB) nanoparticles, which allow for electrochemical control over film thickness and mechanical properties. Electrochemical reduction of the…
Rapid growth in nanomaterial manufacturing is raising concerns about potential adverse effects on the environment. Nanoparticle contact with intact organisms in the wild may lead to different biological responses than those observed in laboratory cell-based toxicity assays. In nature, the scale and chemistry of nanopa…
Gate control of phosphorus donor based charge qubits in Si is investigated using a tight-binding approach. Excited molecular states of P2+ are found to impose limits on the allowed donor separations and operating gate voltages. The effects of surface (S) and barrier (B) gates are analyzed in various voltage regimes wi…
We review recent theoretical and experimental advances toward understanding the effects of nuclear spins in confined nanostructures. These systems, which include quantum dots, defect centers, and molecular magnets, are particularly interesting for their importance in quantum information processing devices, which aim t…
We present first-principles calculations of AlGaN/GaN superlattice, clarifying the microscopic origin of the light emission and revealing the effect of local polarization within the quantum well. Profile of energy band and distributions of electrons and holes demonstrate the existence of a main active site in the well…
We observe ground-state polariton condensation in a two dimensional GaAs/AlAs semiconductor microcavity under non resonant pulsed optical excitation. We resolve the formation of a polariton condensate by studying the spatial, angular, coherence, energy and transient dynamics of polariton photoluminescence. For high ex…
Studying crystal structures of superprotonic phases of alkali metal hydrogen sulfates and selenates, a very unusual phenomenon has been revealed. Dynamically disordered hydrogen atoms with low position occupancies are clearly seen in corresponding electron density maps. To explain this effect, an idea about a new type…
The degree of B/B;{'} alternate cation order is known to heavily influence the magnetic properties of A_{2}BB;{'}O_{6} double perovskites although the nature of such disorder has never been critically studied. Our detailed x-ray absorption fine structure studies in conjunction with synchrotron radiation x-ray diffract…
Energy-storage systems (ESSs) play an important role in electric vehicle (EV) and hybrid EV (HEV) applications. In the system, an ultracapacitor is preferred for high power buffer and regenerative braking energy storage because it has the advantages of high power density, long life cycles, and high efficiency. While i…