Materials Literature
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The synergistic effects of extracellular matrix (ECM) protein combinations on Hep3B cell proliferation and functions are studied herein. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) microspheres were covalently conjugated with three types of proteins, collagen (type I), laminin, and fibronectin, using 1-ethyl-3…
In this paper, we investigate the physical mechanism and properties of the two classes of photonic gaps in the aperiodic Thue-Morse (TM) lattice: the traditional gaps and the fractal gaps. Based on the analysis of the field distributions of the midgap and gap-edge states, we demonstrate that the two classes of gaps or…
High-angular-resolution electron energy loss spectroscopy (EELS) is used to study the anisotropic behavior of the boron and nitrogen K ionization edges in h-BN. This work makes significant progress toward improving the anisotropy measurements. The authors show experimentally by EELS the vanishment of the π* peak exist…
This letter presents a reliable and very easy method for selective growth of polarity controlled ZnO films on (0001) Al2O3 substrates by plasma-assisted molecular-beam epitaxy. Cr-compound intermediate layers are used to control the crystal polarity of ZnO films on (0001) Al2O3. ZnO films grown on rocksalt structure C…
The authors propose a new method, the Helfand-moment method, to compute the shear viscosity by equilibrium molecular dynamics in periodic systems. In this method, the shear viscosity is written as an Einstein-type relation in terms of the variance of the so-called Helfand moment. This quantity is modified in order to…
Abstract Raman scattering and surface‐enhanced Raman scattering (SERS) have been used to study the behavior of 4‐mercaptopyridine (4‐Mpy) dissolved in water and adsorbed on silver mirrors. In order to gain the actual structure and the theoretical modes of the 4‐Mpy dissolved in water and adsorbed on the surface of sil…
Hollow spheres of zinc ferrite were prepared via a surfactant‐assisted hydrothermal approach. The morphology and composition of the final products were characterized by X‐ray diffraction, transmission electron microscopy, and field emission scanning electron microscopy. It was observed from the microscope images that…
Amorphous Al 2 O 3 –MgO thin films with an Mg/Al ratio of unity were prepared on glass substrates by the sol–gel method with a heat treatment at 300°C for 30 min. By immersing the films in water containing sodium hydroxide (pH 10–13) at 100°C, nano‐crystals of Mg–Al‐layered double hydroxide (LDH) with a hexagonal stru…
Radio frequency (RF) thermal plasma treatment is studied for the size reduction and the spheroidization of coarse glass particles to change them into submicrometer‐sized powders of spherical shape. Such ultra‐fine spherical powders are the key ingredients of a sintering aid to achieve efficient package and high perfor…
Abstract A comparative evaluation of systematically tailored chemical structures of various phosphorus‐containing aminic hardeners for epoxy resins was carried out. In particular, the effect of the oxidation state of the phosphorus in the hardener molecule on the curing behavior, the mechanical, thermomechanical, and…
Bi Sc O 3 – Pb Ti O 3 (BSPT) thin film was grown on electrical conductive Nb-doped SrTiO3 (100) (Nb-STO) single crystal substrate by a sol-gel method. The x-ray diffraction and high resolution transmission electron microscopy proved the epitaxial growth relation between the BSPT thin film and Nb-STO substrate. The [00…
A series of three biocompatible P(CL-co-LA)-PEG-P(CL-co-LA) copolymers were synthesized using ring-opening polymerization and characterized by 1H-NMR, gel permeation chromatography, DSC, dynamic-mechanical analysis, and X-ray diffraction. The number of monomer units was kept constant, while the D,L-LA fraction was var…
The optical properties of hollow ZnS microspheres were studied. The Raman scattering spectra of the hollow ZnS microspheres depend strongly on the excitation power, and at an excitation power of about I0∕10, a strong resonant Raman scattering spectrum with high-order longitudinal optical modes and weak high-order surf…
The positive temperature coefficient of resistivity (PTCR) characteristics of donor‐doped BaTiO 3 fired in a reducing atmosphere and reoxidized in air are investigated. The result reveals that conventional semiconducting BaTiO 3 ceramics fired in a reducing atmosphere and reoxidized at a low temperature of 800°C in ai…
A dielectric relaxation with a “giant” dielectric constant (ε∼104) at low frequencies and a remaining high ε(∼5×103) background at high frequencies (>1MHz) are observed in Bi doped SrTiO3 ceramics annealed in a reduced atmosphere. The material possesses a very high capacitance-temperature sensitivity at ∼2K, wh…
Alumina thin films deposited by dip coating on alumina substrates were sintered between 1150° and 1350°C. A new measuring system using a rocking arm as a mechanical amplifier allows in situ measurement of the shrinkage of the film. Comparison of experimental densification behavior with the predictions of the isotropic…
Abstract Solvent‐induced self‐organization approach was developed, for the first time, to produce polyurethane microporous templates and higher ordered morphologies such as micro or nanometer‐sized polymeric hexagons and spheres. A novel melt transurethane methodology was designed and developed for synthesizing new cl…
Polyethylene glycol (PEG) is often cited as a "stealth" polymer, capable of resisting both protein adsorption and cell adhesion. By extension, PEG would then be expected to limit the host response. Monocyte-derived macrophages play an integral role in inflammation, and thus their response to a material can potentially…
The 0.95(Na 0.5 K 0.5 )NbO 3 –0.05SrTiO 3 (0.95NKN–0.05ST) ceramics formed in this study had a porous microstructure with small grains and low piezoelectric properties due to their low density. However, when a small amount of Na 2 O was intentionally subtracted from the 0.95NKN–0.05ST ceramics, a liquid phase was form…
Strain relaxation and the ferroelectric critical temperature were investigated in a series of epitaxial Pb(Zr0.20Ti0.80)O3 thin films of different thicknesses grown on metallic 0.5% Nb-doped SrTiO3 substrates. Detailed x-ray diffraction studies reveal that strain relaxation progressively occurs via misfit dislocations…