Materials Literature
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Review discusses some special questions of physics of composite media (metamaterials), which are formed by elements made from natural materials of two kinds. The first ones are “carriers of permittivity” and are presented by plasma-like media and semiconductors. The second ones are “carriers of permeability”—they are…
Highly c-axis oriented ZnO films have been deposited at room temperature with high rates (∼50 nm·min−1) using an innovative remote plasma sputtering configuration, which allows independent control of the plasma density and the sputtering ion energy. The ZnO films deposited possess excellent crystallographic orientatio…
Polymeric nanocarriers are versatile structures that can be engineered to obtain high drug loading, good delivery yields and tunable release kinetics. Moreover, the particle surface can be modified for selective targeting of organs or tissues. In particular, polymeric nanocarriers can be conjugated with functional gro…
Evolution with calcination temperature of Eu3+ sites in CeO2 nanocrystals is investigated by time-resolved photoluminescence spectroscopy. In the as-synthesized Eu3+ impregnated CeO2, most of Eu3+ ions reside on surface (S) sites. The Eu3+emission in S sites is broad and short-lived (τ = 240 μs) being dominated by the…
The dependence of large signal properties of (1−x)(0.81Bi1/2Na1/2TiO3-0.19Bi1/2K1/2TiO3)-xBi(Zn1/2Ti1/2)O3 with x = 0.02, 0.03, and 0.04 on the measurement frequency was investigated for a wide range of frequencies from 0.1 Hz to 100 Hz. A significant frequency dispersion in the characteristic parameters representativ…
Gold nanoparticles synthesized via sodium citrate reduction of chloroauric acid (HAuCl(4)) were functionalized with either various concentrations of thiol-terminated Bodipy(®) FL L-cystine (0.5, 1.0, 1.5, and 2.0 μg/mL) or Bodipy-poly(ethylene glycol) at concentrations of 0.5-18.75, 1.0-12.50, and 1.5-6.25 μg/mL to fo…
Polymer nanocomposites consist of nanoscale additives embedded in a polymer matrix and are widely used in the automobiles, optics and microelectronics industries. Since the composition and the morphology of the polymer nanocomposite impact its macroscopic properties, significant efforts have been made to understand ho…
The phonon conductivity in suspended graphene and in graphene nanoribbons has been studied within the framework of Callaway’s effective relaxation time theory. The conductivity expression has been computed by employing analytical expressions for phonon dispersion relations and vibrational density of states based on th…
BACKGROUND: The controlled introduction of covalent linkages between dendrimer building blocks leads to polymers of higher architectural order known as tecto-dendrimers. Because of the few simple steps involved in their synthesis, tecto-dendrimers could expand the portfolio of structures beyond commercial dendrimers,…
This work presents a study of the domain wall dynamics in Pb(Zr1−xTix)O3 (PZT)-based piezoceramics by means of the temperature dependence non-linear dielectric response and hysteresis loop measurements. In soft PZT, non-linear response gradually increases as the temperature is raised. A similar response is displayed b…
PURPOSE: This study determined the effects of chitosan (CTS) and water-soluble chitosan (WSC) microparticles (MPs) and nanoparticles (NPs) in rats with high-fat diet-induced obesity. METHODS: THE RATS WERE RANDOMLY SEPARATED INTO EIGHT GROUPS: a normal diet group (the blank control), a high-fat emulsion group (the neg…
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
UNLABELLED: Polymer-layered silicate nanocomposites have been shown to improve the gas barrier properties of food packaging polymers. This study developed a computer simulation model using the commercial software, COMSOL Multiphysics to analyze changes in oxygen barrier properties in terms of relative diffusivity, as…
Composites composed of high-density polyethylene, woven flax fiber textiles (flax weave style of 2 × 2 twill and 4 × 4 hopsack) and SiO 2 were produced by hot press with nanospraying technique. The SiO 2 slurries were sprayed on the woven flax fiber followed by drying. The related HDPE/woven flax fibers composites wer…
This paper presents the synthesis of aqueous cadmium sulfide (CdS) quantum dots (QDs) and silica-encapsulated CdS QDs by reverse microemulsion method and utilized as targeted bio-optical probes. We report the role of CdS as an efficient cell tag with fluorescence on par with previously documented cadmium telluride and…
Abstract As high strength aluminum alloys are generally hard to deform, the application of conventional severe plastic deformation methods, which in principle allow the generation of ultra fine grained microstructures and increasing strength, is limited. In this study, cryogenic ECAP deformation as an alternative appr…
Structural and magnetic properties of polycrystalline YMn1−xCrxO3 with x = 0, 0.05, and 0.1, which was prepared by solid-state method, have been investigated. The x-ray diffraction patterns reveal that all the samples are in single phase and show hexagonal structure with P63cm space group. The temperature dependence o…
Intrinsic β-Ga 2 O 3 and Zn-doped β-Ga 2 O 3 films were prepared using RF magnetron sputtering. The effects of the Zn doping and thermal annealing on the structural and optical properties are investigated. In comparison with the intrinsic β-Ga 2 O 3 films, the microstructure, optical transmittance, optical absorption,…
Photoinitiated graft copolymerization of acrylamide onto chitosan under heterogeneous conditions and in the absence of a photo initiator was investigated. The effect of irradiation time, the amount of chitosan and monomer concentration on the extent of grafting was examined. The maximum grafting percentage obtained wa…
10.1166/nnl.2012.1377