Materials Literature
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Seamless, non-woven, bioresorbable vascular prosthetics composed of sub-micron fibers have been successfully created through electrospinning. These prosthetics have proven to be both bioactive and mechanically viable during in vitro testing, and hold great potential to be conducive to in situ tissue engineering/regene…
Summary Poly(lactide‐ co ‐glycolide) (PLGA) (50:50) films loaded with antioxidants, such as 2% α ‐tocopherol, or a combination of 1% butylated hydroxytoluene (BHT) and 1% butylated hydroxyanisole (BHA), were used in an antioxidant release study in water and oil at 4 and 25 °C, and to evaluate the stability of dry whol…
Orientation dependent electron phonon (EP) coupling on single wurtzite CdS nanowires with average diameter of 60nm has been studied using polarized Raman spectroscopy. The Raman spectra of nanowires are compared with those of bulk ribbon. Different from the bulk sample, the EP coupling of the nanowires is polarized al…
Oriented barium ferrite (BaM) and polycrystalline ferroelectric barium strontium titanate (BSTO) layered structures have been fabricated by pulsed laser deposition. The 0.5μm thick BaM layer has a saturation induction of 4kG, a uniaxial effective anisotropy field of 16kOe, and a relatively low ferromagnetic resonance…
Abstract In this study, we exclusively found that the exfoliated poly(vinyl acetate)‐montmorillonite (PVAc‐MMT) nanocomposite latices could be straightforwardly fabricated by soap‐free emulsion polymerization and cast into a film. The as‐fabricated films were transparent with the exfoliated MMT nanoplatelets in flat f…
Carbon nanotubes have very high potential for applications in nano-electromechanical devices, nano-optomechanical systems and nano-composites. However, their full exploitation depends upon knowledge of their mechanical, electrical and thermal properties. Several analytical, experimental, molecular mechanics (MM) and m…
Abstract This contribution reports on the synthesis of hyperbranched polylysines via thermal polymerization of L ‐lysine hydrochloride. Polymerization of L ‐lysine hydrochloride in the presence of one equivalent KOH at 150 °C resulted in polymers with a number‐average molecular weight of 4600 g/mol and a polydispersit…
The ultrafast photoluminescence dynamics of nitride-passivated silicon nanocrystals is investigated using the variable stripe length geometry with 200 femtosecond pump pulses. We find that the luminescence lifetimes are in the nanosecond range throughout the entire spectral range. However, no evidence for optical gain…
Abstract A novel in‐site H 2 O 2 strategy is proposed for the liquid‐phase epoxidation of propene catalyzed by titanium silicalite (TS‐1). Said in‐site H 2 O 2 strategy is based on the direct synthesis of H 2 O 2 from H 2 and O 2 under atmospheric pressure via nonequilibrium plasma reactions. Methanol is used to absor…
Abstract The thermal behavior and spherulitic morphologies of poly( L ‐lactic acid) (PLLA)/poly( D ‐lactic acid) (PDLA) 1/1 blend with weight‐molecular‐weight of 10 5 order, together with those of pure PLLA and PDLA, were investigated using differential scanning calorimetry and polarized optical microscopy. It was fou…
Novel green and sustainable elastomers having both good biodegradability and chemical recyclability properties were designed and synthesized using potentially biobased materials and lipase as an environmentally benign catalyst. High molecular weight poly[(12-hydroxydodecanoate)-co-(12-hydroxystearate)] [poly(12HD-co-1…
Pb Ti O 3 – Bi Me O 3 (Me=Fe, Zn1/2Ti1/2, and Zn3/4W1/4) solid solutions exhibit unusually enhanced tetragonality (c/a). Lattice dynamics and structure of PbTiO3–BiMeO3 with enhanced c/a were investigated by Raman scattering technique and x-ray Rietveld method, respectively. The A1(1TO) soft mode, associated with the…
One of the fundamental goals in biology is to understand the complex spatiotemporal interplay of biomolecules from the cellular to the integrative level. To study these interactions, researchers commonly use fluorescent labeling for both in vivo cellular imaging and in vitro assay detection (1)(2). In this context, on…
Double and single vacancies differently affect the conductance of carbon nanotubes [G. Gómez-Navarro et al., Nat. Mater. 4, 534 (2005)], so that the exact knowledge of the abundance of these defects is mandatory for an unambiguous interpretation of irradiation-induced changes in nanotube conductance. We calculate conc…
Abstract A copolymer, poly(aniline‐ co‐o ‐aminophenol), was prepared chemically by using ammonium peroxydisulfate as an oxidant. The monomer concentration ratio of o ‐aminophenol to aniline strongly influences the copolymerization rate and properties of the copolymer. The optimum composition of a mixture for the chemi…
This paper presents a recently developed theory of colloid dynamics as an alternative approach to the description of phenomena of dynamic arrest in monodisperse colloidal systems. Such theory, referred to as the self-consistent generalized Langevin equation (SCGLE) theory, was devised to describe the tracer and collec…
Abstract In this article, the linear and nonlinear shear rheological behaviors of polylactide (PLA)/clay (organophilic‐montmorillonite) nanocomposites (PLACNs) were investigated by an Advanced Rheology Expanded System rheometer. The nanocomposites were prepared by master batch method using a twin‐screw extruder with p…
A new kind of carbon foam, which is based on the welding of single-walled carbon nanotubes, is built in a computer simulation. Its precisely defined architecture and all atomic positions allow one to perform detailed theoretical analysis of the properties. Such foam is as light as 19 of steel, while its stiffness is s…
Highly ordered linear C60 molecular-chain arrays with 2.31-nm interchain spacing (see image) are self-assembled on Ag(111) by using α-sexithiophene (6T) monolayer nanostripes on Ag(111) as a molecular surface nanotemplate. The subtle balance between molecule–molecule and molecule–substrate interactions facilitates the…
Nanocomposites offer a promising approach to incorporate nanostructured constituents to bulk thermoelectric materials. n-type CoSb3 nanocomposites were prepared by hot pressing the mixture of nanoscale and microsized CoSb3 powders synthesized by solvothermal method and melting, respectively. Microstructure analysis sh…