Materials Literature
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The dielectric properties of dual-layer PZT/ZrO 2 thin films were measured at microwave frequencies in both a metal–insulator–metal (MIM) capacitor and a coplanar waveguide (CPW) up to 50 GHz. Both PZT and ZrO 2 films were prepared by the chemical solution deposition method. The measured dielectric loss of the PZT/ZrO…
Light-switchable peptide: The combination of cyclization and a photocleavable amino acid provides a potentially versatile strategy for the photocontrol of peptide function. Upon photoirradiation, photoactivatable cyclic matrix metalloproteinase-3 inhibitor peptide (MMPI) was degraded to give the corresponding linear p…
This paper reports on several developments of X-ray fluorescence techniques for macromolecular crystallography recently implemented at the National Institute of General Medical Sciences and National Cancer Institute beamlines at the Advanced Photon Source. These include (i) three-band on-the-fly energy scanning around…
Magnetostrictive materials are distinguished by an inherent coupling between their mechanical and magnetic processes which is manifested as a direct (actuator) and an inverse (sensor) effect.The piezomagnetic equations for modeling these attributes can be derived from the thermodynamic potentials, with the usual assum…
We present a dual-negative refraction effect based on the overlapping bands in a two-dimensional triangular photonic crystal formed by holographic lithography. Under certain conditions, one incident plane wave launched into this photonic crystal can be dispersed into two negative refracted waves at the same frequency…
Abstract This work aims to develop a facile and effective approach to tailoring amine functional groups on the TiO 2 surface by depositing a thin film of plasma polymeric allylamine which is rich in amine groups. Furthermore, the primary amine groups on the surface are used to covalently immobilize heparin. The result…
In the present experimental study, we describe the high capacity of a poly(amido amine)-tris(hydroxymethyl)amidomethane dendrimer for the physical adsorption of various chemical species (ligands), namely, cationic copper, anionic nitrate, and polyaromatic hydrocarbon phenanthrene. A pH-dependent specificity was observ…
Few-layer graphene films were grown from spin-coated polystyrene films deposited on polycrystalline Ni substrates simply by heating in an Ar atmosphere. In this method, it is not necessary to use any reactive gas. Instead, the graphene film thickness is simply controlled by the initial thickness of the polystyrene fil…
Superconducting thin films of Fe y Se 1 − x Te x have been successfully grown on a variety of single-crystal substrate materials by radio frequency sputtering, and the effect of processing conditions on the microstructural development and superconducting properties has been investigated. The degree of unit cell anisot…
Abstract The nonlinear optical (NLO) properties of Bi 2 O 2 (OH)(NO 3 ) crystals have been reported for the first time. Bi 2 O 2 (OH)(NO 3 ) crystals with dimensions of 1.3×1.2×0.1 mm 3 have been grown by hydrothermal method, and the crystals characterized by X‐ray powder diffraction (XRD), SEM and IR. The measured se…
We present a first-principles theory for the slow dynamics of a fluid of entangling rigid crosses of zero excluded volume based on a generalization of the dynamic mean-field approach of Szamel for infinitely thin nonrotating rods. The latter theory exactly includes topological constraints at the two-body collision lev…
An efficient noncovalent assembly process involving high geometrical control was applied to a linear bis(imidazolyl zinc porphyrin) 7Zn, bearing C(18) substitutents, to generate linear multiporphyrin wires. The association process is based on imidazole recognition within the cavity of the phenanthroline-strapped zinc…
Einfach Wasser zugeben: Tl(TCNQ)-Polymorphe mit sehr verschiedenen Ladungstransporteigenschaften wurden isoliert, von denen eines einen bemerkenswerten Phasenübergang in die zweite Phase zeigt, wenn es in einer feuchten Umgebung gehalten wird (siehe Bild).
The phototoxicity of ultraviolet A irradiation (UVA) can be enhanced by photosensitizing agents, such as titanium dioxide nanoparticles (100 nm in diameter, "normal-TiO₂"). Nano-TiO₂ treatment in the absence of UVA caused a slight decrease in cell viability, but in the presence of UVA, it caused a significant decrease…
Many steel structures can absorb varying amounts of hydrogen during manufacturing, processing such as electroplating or acid pickling and during service life by corrosion reactions or cathodic protection. Hydrogen is known to have a devastating effect on strength and ductility of iron and steel components. Many studie…
A charge disproportionate La 0.5 Ba 0.5 FeO 3 (LBFO) ceramic sample with cubic structure has been synthesized by the conventional high-temperature solid-state reaction route. Dielectric behaviour of LBFO has been studied over a wide temperature (100–370 K) and frequency (100 Hz–5 MHz) ranges. LBFO exhibits relatively…
Abstract Growth of large β‐barium borate (BBO) crystals of high optical quality has been challenging, even 25 years past its discovery. The best results in terms of size and quality have been demonstrated by means of TSSG (Top Seeded Solution Growth). Nevertheless, the maximum available size of nonlinear optical eleme…
It is shown that the ellipsometric spectra of short range ordered planar arrays of gold nanodisks supported on glass substrates can be described by modeling the nanostructured arrays as uniaxial homogeneous layers with dielectric functions of the Lorentz type. However, appreciable deviations from experimental data are…
Bombyx mori silk fiber-reinforced polypropylene (PP) matrix and E-glass fiber-reinforced PP matrix composites were fabricated using compression molding. The prepared silk/PP composite tensile strength (TS), bending strength (BS), and impact strength (IS) were 55.1 MPa, 56.3 MPa, and 17 kJ/m 2 , respectively. E-glass f…
Liposomes are frequently used as pharmaceutical nanocarriers to deliver poorly water-soluble drugs such as temoporfin, cyclosporine A, amphotericin B, and paclitaxel to their target site. Optimal drug delivery depends on understanding the release kinetics of the drug molecules from the host liposomes during the journe…