Materials Literature
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Macroporous scaffolds are of great value in tissue engineering. We have developed a method to fabricate macroporous scaffolds from a biocompatible and biodegradable elastomer, poly(glycerol sebacate) (PGS). This method is potentially very useful for soft tissue engineering. Our fabrication method produced macroporous…
ABSTRACT: Two different deacetylated chitosans were dissolved in formic, acetic, lactic, or propionic acid to prepare chitosan films. The pH values of the film‐forming solutions were adjusted to 3, 4, and 5. Water vapor permeability (WVP), tensile strength (TS), elongation (E), and total soluble matter (TSM) were sign…
This paper focuses on the electrical insulation properties of a newly prepared composite material by nano- and micro-filler mixture. Nano- and micro-filler mixture composites were made by dispersing nano-scale layered silicate fillers and micro-scale silica fillers in epoxy resin. To investigate the effects of nano- a…
Abstract Intermetallic phases can be found in almost every magnesium alloy. These intermetallic compounds play a very important role in optimizing the microstructure and mechanical properties. The present paper reviews the effects of intermetallics in magnesium alloys mainly based on their stabilities: dissolvable int…
We report the rational design of a chitosan-based drug delivery system. The chitosan derivative N-[(2-hydroxy-3-trimethylammonium)propyl]chitosan chloride (HTCC) was ionically cross-linked by sodium tripolyphosphate (TPP) to form sub-200-nm microgels that are responsive to pH changes. When these microgels were loaded…
Gold nanorods (NRs) have received much attention due to their size-dependent surface plasmon-related optical properties. A seed-mediated approach has recently been developed for the synthesis of Au NRs with varying length-to-diameter aspect ratios. With the introduction of silver ions in the growth solution, Au NRs of…
Abstract Different modes of preservation of root traces (rhizoliths) provide information on soil-moisture regimes in alluvial paleosols in the Paleogene Fort Union and Willwood formations of the Bighorn Basin, Wyoming, U.S.A. This paper links different styles of rhizolith preservation to paleosols whose other pedogeni…
Sculptured thin films (STFs) are a class of nanoengineered materials with properties that can be designed and realized in a controllable manner using physical vapor deposition. This text, presented as a short course at the SPIE Optical Science and Technology Symposium, couples detailed knowledge of thin-film morpholog…
Organotransition metal complexes have much to offer as nonlinear optical (NLO) chromophores since they allow large hyperpolarizabilities to be combined with various other physical properties in an unparalleled diversity of molecular structures. This Account summarizes our synthetic chemistry driven investigations in t…
In this paper, a nonlocal Bernoulli-Euler beam model is established based on the theory of nonlocal elasticity. Frequency equations and modal shape functions of beam structures with some typical boundary conditions are derived based on the model. The corresponding dynamic properties are presented and discussed in deta…
The fluorescence behavior of molecular dyes at discrete distances from 1.5 nm diameter gold nanoparticles as a function of distance and energy is investigated. Photoluminescence and luminescence lifetime measurements both demonstrate quenching behavior consistent with 1/d(4) separation distance from dye to the surface…
A very efficient energy-management system for hybrid electric vehicles (HEVs), using neural networks (NNs), was developed and tested. The system minimizes the energy requirement of the vehicle and can work with different primary power sources like fuel cells, microturbines, zinc-air batteries, or other power supplies…
The use of high-dielectric-constant (high-κ) materials for embedded capacitors is becoming increasingly important. Tantalum oxide (Ta2O5) is a prominent candidate as a high-κ material for embedded capacitor use. Metal drift in Ta2O5 (κ∼25) was investigated by bias temperature stress and triangular voltage sweep testin…
We report a study of spin waves in hole-doped ferromagnetic ${\mathrm{La}}_{7∕8}{\mathrm{Sr}}_{1∕8}\mathrm{Mn}{\mathrm{O}}_{3}$, in the metallic state $(165\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ below ${T}_{C}$ $(181\phantom{\rule{0.3em}{0ex}}\mathrm{K})$, and through the puzzling metal-insulator transition which occ…
Abstract A series of novel soluble pyridazinone‐ or pyridazine‐containing poly(arylene ether)s were prepared by a polycondensation reaction. The pyridazinone monomer, 6‐(4‐hydroxyphenyl)pyridazin‐3(2 H )‐one ( 1 ), was synthesized from the corresponding acetophenone and glyoxylic acid in a simple one‐pot reaction. The…
Abstract By means of the diagonalization of the complete energy matrix of 3d 2 /d 8 ions in trigonal symmetry and in consideration of the covalency reduction effect, the optical and EPR spectra of V 3+ ions in C(NH 2 ) 3 Al(SO 4 ) 2 · 6H 2 O crystal are calculated. The results are in agreement with the observed values…
In the synthesis of the disordered lyotropic liquid crystalline L3 sponge phase prepared with the cosurfactants cetylpyridinium chloride and hexanol, aqueous NaCl solution is used as the solvent. When this sponge phase is used as the template for L3 silica-phase processing, we replace NaCl with HCl to facilitate the a…
The (001) surface of triclinic hen egg-white lysozyme-nitrate crystals has been investigated by in-situ atomic force microscopy (AFM) to compare its growth mechanisms and properties to those of other lysozyme pseudopolymorphs. The crystal morphology derived from connected net analysis using the macrobond concept is in…
Several subphthalocyanine derivatives that contain an alkoxo substituent as an axial ligand (RO-Subpc, R = 9-anthracenemethyl, benzyl, phenyl, 3,5-dimethylbenzyl, 3,5-dimethylphenyl, 4-methylbenzyl, and 4-methylphenyl) were synthesized. The formation of inclusion complexes of RO-Subpc with beta-CD in DMSO and at the t…
Harshaw TLD-700H (7LiF:Mg,Cu,P) was previously characterised for low- to high-dose ranges from 1 microGy to 20 Gy. This paper describes the studies and results of dose-response and linearity at much higher doses. TLD-700H is a near perfect dosimetric material with near tissue equivalence, flat energy response, and the…