Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The electrical-insulation degradation of BaTiO3 is now of growing interest as the BaTiO3-based dielectric layers of multilayer ceramic capacitors are getting thinner to submicron thicknesses. The degradation is understood to be due to the electrotransport of oxygen vacancies and may be monitored by the colors emanatin…
Lead-free piezoelectric (1- x )(K 0.48 Na 0.52 )NbO 3 – x LiSbO 3 [(1- x )KNN– x LS] ceramics were prepared by conventional sintering. A morphotropic phase boundary (MPB) between the orthorhombic and tetragonal phases was identified in the composition range of 0.04< x <0.06. The ceramics near the MPB exhibit a strong…
Two mixed-valence polyoxometalates were shown to serve both as good reductants of silver cation and efficient capping agents for the resulting metallic nanostructures. Both nanowires and spherical nanoparticles were observed, showing for the first time that polyoxometalates can also induce the synthesis of one-dimensi…
Biologically derived polyesters known as polyhydroxyalkanoates (PHAs) represent a potentially "sustainable" replacement to fossil-fuel-based thermoplastics. However, current commercial practices that produce PHA with pure microbial cultures grown on renewable, but refined, feedstocks (i.e., glucose) under sterile cond…
This work discusses quantitative aspects of energy transfer occurring in sol−gel derived organic−inorganic di-ureasil hybrids incorporating either [Eu(btfa) 3 (4,4‘-bpy)(EtOH)] (btfa = benzoyltrifluoroacetonate, 4,4‘-bpy = 4,4‘-bipyridine) or Eu(CF 3 SO 3 ) 3 . Host-to-Eu 3+ energy transfer occurs either via ligand si…
In our quest to develop new drug delivery systems, we designed and synthesized PEG-conjugates and PEG-hydrogels with a degradable linkage to the drug. Specifically, methoxyPEG-doxorubicin (MPEG-CH=N-Doxo) and doxorubicin-PEG aldehyde (OHC-PEG-CH=N-Doxo) conjugates, plus poly (vinyl amine)-PEG-doxorubicin (PVAm-PEG-Dox…
Abstract Direct melt mixing in a twin screw extruder is a simple and classical technique for preparing nanocomposites by dispersing organoclay in a thermoplastic matrix. In this paper, we focus on organoclay/polypropylene nanocomposites, using maleated polypropylene as compatibilizer. The objective of the work is to c…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTIn Situ Formation of Gold-"Decorated" Vesicles from a RAFT-Synthesized, Thermally Responsive Block Copolymer§Yuting Li, Adam E. Smith, Brad S. Lokitz, and Charles L. McCormickView Author Information Department of Polymer Science and…
Freestanding crosslinked liquid-crystalline polymer films obtained by self-assembly through intermolecular hydrogen bonding showed photoinduced bending and unbending. The structural change at the microscopic level, caused by trans–cisphotoisomerization of the azobenzene moieties at the hydrogen-bonded crosslinks, is s…
Controlled, ordered arrays of ZnO nanorods having a high aspect ratio of ∼30:1 and diameter of ∼50 nm were fabricated on silicon substrates by combining electron-beam lithography and simple solution growth techniques. This top-down and bottom-up hybrid approach resulted in excellent control of periodicity, location, a…
We have used time-resolved x-ray diffraction to study the amorphous-crystalline phase transition in 20–80nm particles of the phase change materials Ge2Sb2Te5, nitrogen-doped Ge2Sb2Te5, Ge15Sb85, Sb2Te, and Sb2Te doped with Ag and In. We find that all samples undergo the phase transition with crystallization temperatur…
Polymer conjugates are nano-sized, multi-component constructs already in the clinic as anticancer compounds, both as single agents or as elements of combinations. They have the potential to improve pharmacological therapy of a variety of solid tumors. Polymer-drug conjugation promotes passive tumor targeting by the en…
When a high-intensity laser pulse is focused into a liquid the energy is converted into mechanical energy via an optodynamic process. The conversion starts with plasma formation; this is followed by shock-wave propagation and the expansion of a cavitation bubble. A cavitation bubble developed near boundaries results i…
We present results of a theoretical analysis of the phosphorylation reaction in cAMP-dependent protein kinase using a combined quantum mechanical and molecular mechanics (QM/MM) approach. Detailed analysis of the reaction pathway is provided using a novel QM/MM implementation of the nudged elastic band method, finite…
Large-scale ZnO nanotube bundles were successfully synthesized by a single solution method at lower temperature. Every ZnO nanotube bundle is composed of closely packed nanotubes, with inner diameters of ∼350 nm and wall thicknesses of ∼60 nm, and forms radiating structures. The influence of the reaction time on the s…
Abstract Supramolecular chemistry is an exciting area of science that plays a central role in bringing different disciplines together, ranging from molecular medicine to nanotechnology. Materials science based on supramolecular interactions is an emerging field, which has made important steps forward in the past ten y…
Fe3O4 nanoparticles were synthesized by co-precipitation of Fe 3+ and Fe 2+ with NH4OH, and then silica was coated onto the surface of Fe3O4 by hydrolysis of TEOS. Coupling agent was also coupled with the surface of the nanoparticles and protein was immobilized. Morphology, particle size, and magnetic properties of th…
Nonwoven webs containing five different blends of bleached cotton with Lyocell rayon, bicomponent core/sheath polyester/polyethylene, or cotton comber noil were prepared by either light needlepunching, or light needlepunching followed by spunlacing (hydroentanglement). We optically acquired fiber bundle size measureme…
In the analysis and design of functional clothing systems, it is helpful to quantify the effects of a system on a wearer’s physical performance capabilities. Toward this end, a clothing modeling framework for quantifying the mechanical interactions between a given clothing system design and a specific wearer performin…
Blends of polybutylene (PB-1) and polypropylene were used to produce fibers at spinning speeds of 800-2100 m/min. Concentrations ranged from 0% PP to 100% PP. The stress-strain behavior of the resultant fibers was examined, and the fibers were analyzed for crystallinity via DSC (differential scanning calorimetry). Fib…