Materials Literature
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We investigate the effect of a microwave field on a confined two dimensional electron gas which contains an insulating region comparable to the Fermi wavelength. The insulating region causes the electron wave function to vanish in that region. We describe the insulating region as a static vortex. The vortex carries a…
We use a fully relativistic layer Green's functions approach to investigate spin-dependent tunneling through a symmetric indirect band gap barrier like GaAs/AlAs/GaAs heterostructure along [100] direction. The method is based on Linear Muffin Tin Orbitals and it is within the Density Functional Theory (DFT) in the Loc…
We report and analyze reversible magnetization measurements on a high quality MgB2 single crystal in the vicinity of the zero field transition temperature, T_c=38.83 K, at several magnetic fields up to 300 Oe, applied along the c-axis. Though MgB2 is a two gap superconductor our scaling analysis uncovers remarkable co…
Nature has long served as a source of inspiration for humans in developing technology.In the last few decades there has been an explosion of studies revealing new and ever more interesting biomaterials and structures that show extreme, unexpected properties.Butterfly wings, mollusk shells, bones, spider silk, gecko fe…
Quantum dots (QDs) hold promise for several biomedical, life sciences, and photovoltaic applications. Substantial production volumes and environmental release are anticipated. QD toxicity may be intrinsic to their physicochemical properties, or result from the release of toxic components during breakdown. We hypothesi…
A broad-band and omnidirectional antireflection coating consisting of semiconductor nanowires is fabricated. The reflection is reduced due to a graded refractive index, which is achieved by a certain nanorod-length distribution of cylindrical and conically shaped rods. An increased transmission and, accordingly, a red…
We employ the inverse Boltzmann method to coarse-grain three commonly used three-site water models (TIP3P, SPC and SPC/E) where one molecule is replaced with one coarse-grained particle with isotropic two-body interactions only. The shape of the coarse-grained potentials is dominated by the ratio of two lengths, which…
Abstract The cuticle of the lobster Homarus americanus is a nanocomposite, such as most structural biological materials. It consists of a matrix of chitin‐protein fibers associated with various amounts of crystalline and amorphous calcium carbonate in the rigid parts of the body, and is organized hierarchically at all…
Although mankind stands to obtain great benefit from nanotechnology, it is important to consider the potential health impacts of nanomaterials (NMs). This consideration has launched the field of nanotoxicology, which is charged with assessing toxicological potential as well as promoting safe design and use of NMs. Alt…
Abstract Conjugated microporous polymers are of great interest because they have potential to combine high surface areas in the dry state with physical properties relevant to organic electronics. A series of recent reports has shown that materials such as poly(aryleneethynylene)s (PAEs), poly(phenyl‐ene butadiynylene)…
This article reviews the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations. The Dirac electrons can be controlled by application of external electric and magnetic fields, or by altering sample geometry and/or topology. The Dirac…
A simple chemical method is described for coating oxide substrates with silver nanoparticles. We report results about Pyrex and ZrO 2 -coated Pyrex substrates obtained by sol−gel elaboration. Atomic force microscopy reveals the irregular polyhedral shapes of the nanoparticles. The morphology of the layer and the amoun…
The sliding of a droplet of polystyrene solution on an inclined glass substrate is studied experimentally. The droplet shape and the sliding velocity are measured with varying the inclination angle, the droplet volume and the polymer concentration. We found that although the sliding behavior of polymer solution drople…
Molecular dynamics (MD) simulation of the structure and thermodynamic properties of liquid and amorphous Fe(2)O(3) nanoparticles, with different sizes ranging from 2 to 5 nm, has been carried out based on the Born-Mayer pair potentials under non-periodic boundary conditions. The partial radial distribution functions (…
In this paper, we introduce an idealized model of silicon nanotubes comprising an exact polyhedral geometric structure for single-walled silicon nanotubes. The silicon nanotubes considered here are assumed to be formed by sp(3) hybridization and thus the nanotube lattice is assumed to comprise only squares or skew rho…
We investigate the spatiotemporal behavior of sheared suspensions of rodlike particles with permanent dipole moments. Our calculations are based on a self-consistent hydrodynamic model including feedback effects between orientational motion and velocity profile. The competition between shear-induced tumbling motion an…
Synthesis and characterization of resorcinol-acetone copolymer is described. The polymer was prepared by trifluoroacetic acid-catalyzed polymerization of resorcinol with acetone. According to the (1)H-NMR, (13)C-NMR, and MALDI-TOF Mass spectra data, the obtained polymer had three types of repeating units: isopropylide…
Spectral properties of a recently developed voltage-sensitive dye, di-4-ANEPPDHQ, were characterized as the dye was dissolved in the solvent dimethyl sulfoxide as the stock solution, in Hank's buffered salt solution as the staining solution, and bound to the plasma membrane of primary rat hippocampal neurons and immor…
Abstract Biodegradable blends of LDPE and cellulose acetate phthalate have been prepared. Maleic anhydride‐grafted LDPE has been added as a compatibilizer to this blend. The elastic modulus and tensile strength has been considerably improved by adding LDPE‐ g ‐maleic anhydride compatibilizer. Scanning electron microsc…
Bulk-phase self-assembly of a series of semifluorinated alkanes (SFAs) with hydrocarbon chains of varying length has been investigated by 19F NMR spectroscopy. At room temperature, a single 19F resonance for the terminal sCF3 group was observed at -81.7 ppm for perfluorododecylhexane (F12H6), whereas a sCF3 resonance…