Materials Literature
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Additives in Water-borne Coatings covers both current technology and the future prognosis for the key additives used in water-borne coatings today. It brings together international experts to provide a comprehensive, practical overview of the field, its direction, and selection of key additives currently employed for…
There are three clear new trends in solution crystallization. The first is crystallizer control, with the aim of better crystals by means of measuring supersaturation and crystal sizes in‐line/on‐line. The second trend is the molecular modeling of crystals. The focus is on finding “tailor made additives” by computer s…
Abstract Poly(ϵ‐caprolactone) (PCL) and poly[( R )‐3‐hydroxybutyrate] ( R ‐PHB) films with pores and hydrophilic surfaces were prepared by the water extraction of poly(ethylene oxide) from as‐cast blend films (1:1) and by the alkali treatment of as‐cast nonporous films, respectively. These films, as well as as‐cast no…
Abstract Recent developments in topological polymer chemistry are outlined. First, nonlinear polymer topologies are systematically classified on the basis of topological considerations of constitutional isomerism in a series of alkanes (C n H 2 n +2 ), monocycloalkanes (C n H 2 n ), and polycycloalkanes (C n H 2 n −2…
Abstract An inverse emulsion method was used to prepare the chitosan microspheres, which were crosslinked with epichlorohydrin between the hydroxyl groups under protection of amino groups to obtain crosslinked chitosan resin. Further chemical modification with glycidyl trimethylammonium chloride was used to form the q…
An aqueous-based process is reported for surface functionalization and grafting of anticoagulant and cell attachment moieties, such as heparin and/or arginine-glycine- aspartate (RGD) onto the lumenal surface of a prefabricated cardiovascular graft (5 mm i.d.) made of poly(carbonate- urea)urethane (MyoLink). It is a t…
Surface aggregation states in miscible blends of monodisperse polystyrene (PS) and poly(vinyl methyl ether) (PVME) were studied by X-ray photoelectron spectroscopy (XPS) in conjunction with neutron reflectivity (NR). In the case of symmetric blends in terms of degree of polymerization, N, PVME and PS were preferential…
A series of heterometal cyclic tetranuclear complexes [Cu(II)LM(II)(hfac)](2) (M(II) = Zn (1), Cu (2), Ni (3), Co (4), Fe(5), and Mn (6)) have been synthesized by the assembly reaction of K[CuL] and [M(II)(hfac)(2)(H(2)O)(2)] with a 1:1 mole ratio in methanol, where H(3)L = 1-(2-hydroxybenzamido)-2-((2-hydroxy-3-metho…
Abstract Thiol‐terminated poly(ethylene oxide) (PEO) was synthesized using two different approaches: esterification of terminal hydroxyl groups with mercaptoacetic acid and amidation using N ‐hydroxysuccinimidyl PEO (NHS–PEO) and cysteine. The reaction of hydroxyl‐terminated PEO with mercaptoacetic acid was carried ou…
The fiber formation mechanism of Bombyx mori silk fibroin by silkworm is essentially the structural change from silk I (the silk fibroin structure before spinning in the solid state) to silk II (the silk fibroin structure after spinning) under external forces in both silk gland and spinneret of B. mori silkworm. Recen…
We report the synthesis and characterization of mesostructured thin silica films derived from methyltriethoxysilane (MTES) and/or tetraethyl orthosilicate (TEOS) silica precursors and polystyrene- block -poly(ethylene oxide) (PS- b -PEO) diblock copolymers via the solvent evaporation-induced self-assembly (EISA) proce…
Abstract This study describes the microstructure and thermal and mechanical properties of poly(hydroxybutyrate‐co‐hydroxyvalerate) (PHB/HV)–organoclay nanocomposites prepared by melt intercalation using Cloisite 30B, a monotallow bis‐hydroxyethyl ammonium‐modified montmorillonite clay. X‐ray diffractometry and transmi…
Nanostructured thin films fabricated from semiconductor nanoparticles (NPs) are of great interest for biomedical applications, but NP materials based on heavy metals can be cytotoxic. In this work, the preparation of semiconductor NPs followed the protocol of layer-by-layer (LBL) assembly, which alleviates this proble…
We show that CdMnTe self-assembled quantum dots can be formed by depositing a submonolayer of Mn ions over a ZnTe surface prior to deposition of the CdTe dot layer. Single dot emission lines and strongly polarized quantum dot photoluminescence in an applied magnetic field confirm the presence of Mn in individual quant…
We demonstrate a new method of measuring the exciton spin relaxation time in semiconductor nanostructures by continuous-wave photoluminescence. We find that for self-assembled CdTe quantum dots the degree of circular polarization of emission is larger when exciting polarized excitons into the lower energy spin state t…
The magnetic and orbital orders for the bilayer manganites in the doping region $0.5 < x <1.0$ have been investigated from a model that incorporates the two $e_g$ orbitals at each Mn site, the inter-orbital Coulomb interaction and lattice distortions. The usual double exchange operates via the $e_g$ orbitals. It is sh…
We report measurements of the in-plane $({\ensuremath{\rho}}_{\mathrm{ab}})$ and out-of-plane $({\ensuremath{\rho}}_{c})$ resistivities on a single crystal of the half-doped bilayer manganite ${\mathrm{LaSr}}_{2}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}.$ In the temperature T range 220 to 300 K, the resistive anisotropy ${\en…
Monte Carlo simulations based on a first-principles-derived Hamiltonian are conducted to study the properties of $\mathrm{P}\mathrm{b}({\mathrm{Z}\mathrm{r}}_{1\ensuremath{-}x}{\mathrm{T}\mathrm{i}}_{x}){\mathrm{O}}_{3}$ alloys compositionally modulated along the [100] pseudocubic direction near the morphotropic phase…
Tactoids are droplets of a nematic phase that under suitable conditions form in dispersions of elongated colloidal particles. We theoretically study the shape and the director-field configuration of such droplets for the case where a planar anchoring of the director field to the interface is favored. A minimum of four…
Time-resolved X-ray diffraction, X-ray absorption fine structure, and first-principles density functional calculations were used to investigate the reaction of CuO and Cu(2)O with H(2) in detail. The mechanism for the reduction of CuO is complex, involving an induction period and the embedding of H into the bulk of th…