Materials Literature
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Self-assembly of thiol-terminated polystyrene-tethered Au nanoparticles in microphase-separated diblock copolymers composed of poly(styrene- b -2vinylpyridine) (PS−PVP) as a function of particle concentration and composition of block copolymers was investigated using anomalous small-angle X-ray scattering (ASAXS) and…
ZnO:Al thin films doped with different aluminum concentrations were deposited onto glass substrates by rf-magnetron sputtering at ambient temperature using, for the first time, nanocrystalline powder synthesized by the sol–gel method. The aluminum doping concentration was varied from 2.0 to 4.5 at.%. All the films exh…
Like a silkworm cocoon: Siliceous nanostructures that resemble silkworm cocoons with inner multishells and outer well-oriented nanochannels have been synthesized by simultaneous compromised vesicle templating and liquid-crystal templating methods (see picture). CTA+=cetyltrimethylammonium; PFO−=perfluorooctanoate.
We present a rectifying manganite–titanate heterojunction exhibiting a magnetic field tunable depletion layer. This creates a large positive magnetocapacitance, a direct measure of the field-induced reduction of the effective depletion width across the junction. Furthermore, the reduction of the junction barrier shift…
Rat liver fatty acid-binding protein (LFABP) is distinctive among intracellular lipid-binding proteins (iLBPs): more than one molecule of long-chain fatty acid and a variety of diverse ligands can be bound within its large cavity, and in vitro lipid transfer to model membranes follows a mechanism that is diffusion-con…
Pacman-type face-to-face zinc-porphyrin-fullerene dyads have been newly synthesized and studied. Owing to the close proximity of the donor and acceptor entities, strong pi-pi intramolecular interactions between the porphyrin and fullerene entities resulted in modulating the spectral and electrochemical properties of t…
Based on the theory of thermal elasticity mechanics, a double-elastic beam model is developed for transverse vibrations of double-walled carbon nanotubes with large aspect ratios. The thermal effect is incorporated in the formulation. With this double-elastic beam model, explicit expressions are derived for natural fr…
The frequency shift and broadening of long-wavelength optical phonons are calculated for varying Fermi level in a bilayer graphene. Symmetric modes with displacements of two layers in phase are affected strongly. In the absence of a magnetic field, the broadening disappears and the frequency shift exhibits a logarithm…
Photoluminescence microscopy studies have detected synchronous-photoluminescence-intensity fluctuations along entire cadmium selenide quantum wires under continuous illumination. While similar photoluminescence blinking has been reported previously for semiconductor quantum dots and rods, the observation of synchronou…
We report superconductivity in heavily boron-doped bulk silicon carbide related to the diamond structure. The compound exhibits zero resistivity and diamagnetic susceptibility below a critical temperature T c of ∼1.4 K, and an effective boron doping concentration higher than 10 21 cm -3 . We present the H – T phase di…
The dynamic behavior of cavitation and gas bubbles under negative pressure has been studied numerically to evaluate the effect of gas bubble injection into a liquid on the suppression of cavitation inception. In our previous studies, it was demonstrated by direct observation that cavitation occurs in liquid mercury wh…
The anti‐corrosive effect of Pachylobus edulis exudate gum in combination with halides ions (Cl – , Br – and I – ) for aluminium corrosion in HCl was studied at temperature range of 30‐60 ° C using weight loss method. Results obtained showed that the naturally occurring exudate gum acts as an inhibitor for aluminium c…
Abstract Nanocomposites of polypropylene with montmorillonite modified with dimethyldioctadecylammonium ions were prepared and the effect of compatibilizers on the mechanical and permeation properties was investigated. Compatibilizers were selected on the basis of their chemical nature, molecular weight, amount of gra…
Amide proton transfer (APT) imaging is a variant of magnetization transfer (MT) imaging, in which the contrast is determined by a change in water intensity due to chemical exchange with saturated amide protons of endogenous mobile proteins and peptides. In this study, eight Fisher 344 rats implanted with 9L gliosarcom…
Phosphorus-doped ZnO (ZnO:P) nanowires were successfully prepared by a novel high-pressure pulsed-laser deposition process using phosphorus pentoxide as the dopant source. Detailed cathodoluminescence studies of single ZnO:P nanowires revealed characteristic phosphorus acceptor-related peaks: neutral acceptor-bound ex…
Infrared reflection measurements of the half-filled two-dimensional organic conductors $\ensuremath{\kappa}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{2}\mathrm{Cu}[\mathrm{N}{(\mathrm{C}\mathrm{N})}_{2}]{\mathrm{Br}}_{x}{\mathrm{Cl}}_{1\ensuremath{-}x}$ [BEDT-TTF denotes bis-(ethylenedith…
We present measurements of the magnetic field dependent microwave surface resistance in laser-ablated YBa$_2$Cu$_3$O$_{7-δ}$ films on SrTiO$_3$ substrates. BaZrO$_3$ crystallites were included in the films using composite targets containing BaZrO$_3$ inclusions with mean grain size smaller than 1 $μ$m. X-ray diffracti…
NaYF4 doped with Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals (UP-NCs) were synthesized in trioctylphosphine oxide (TOPO) solvent via a thermolysis method. It was found that the energy barrier of the phase transition from cubic (α) to hexagonal (β) was significantly reduced in TOPO, and the β-phase NCs were o…
This comprehensive reference book incorporates the latest developments in the synthesis, production, characterization, and application of various types of polymeric nanocomposites. It outlines the various preparation techniques using different types of nanoparticles and polymer matrices with emphasis on clay nanoparti…
Electrospinning has emerged as a unique and versatile technique for the fabrication of nanofibrous structures with well-defined architecture to mimic the native extracellular matrix for tissue engineering applications. In this study, natural polymer alginate-based nanofibers were fabricated by electrospinning blend so…