Materials Literature
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Ge nanocrystallites (Ge-nc) embedded in a SiO(2) matrix are investigated using Raman spectroscopy, photoluminescence and Fourier transform infrared spectroscopy. The samples were prepared by ion implantation with different implantation doses (0.5, 0.8, 1, 2, 3 and 4) × 10(16) cm(-2) using 250 keV energy. After implant…
Abstract We report two novel multifunctional copolymers consisting of a temperature‐responsive poly( N ‐isopropylacrylamide) (PNIPAA) segment and a fluorescent fluorene‐containing acrylic polymer segment with pH responsiveness and/or DNA‐sensing ability. The functional acrylic monomer with a fluorene dimer side group…
A series of novel star-shaped porphyrin-triarylamine conjugates were synthesized by palladium-catalyzed cross-coupling reactions. The spectroscopic and electrochemical studies show that pi-conjugation of the porphyrin core is extended to the triarylamine moieties.
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A core–shell cylinder phase is obtained from the self assembly of chiral diblock copolymers, polystyrene-b-poly(L-lactide) (PS–PLLA) with PLLA-rich fractions. After the self-assembly of the polymer chains, scrolling of the helical microdomains results in core–shell cylinder microstructures (see figure). The microstruc…
New alkynyl complexes [Pt2M4{CC(3-OMe)C6H4}8] (M = Ag 1, Cu 2) have been synthesized and their structures and properties compared to those of related [Pt2M4(CCPh)8] compounds. For the Pt-Ag derivatives, the X-ray structures of the discrete yellow solvate monomer, [Pt2Ag4{CC(3-OMe)C6H4}8].2THF ([1.2THF]), and the dark…
Can quantum dots (QDs) serve as physiologically relevant receptor probes in the interior of cells? We directly visualize endocytosis, redistribution, and shuttling of QD bound-TrkA receptors to PC12 neural processes and far-reaching growth cone tips. Internalized QDs are contained in microtubule-associated vesicles an…
FeS nanoparticles (NPs) were synthesized using ethylenediamine core poly(amidoamine) (PAMAM) dendrimers of generation 4 terminated with amino (G4·NH 2 ), hydroxyl (G4·NGlyOH), and carboxyl (G4·SAH) groups, respectively, as stabilizers. These dendrimer-stabilized FeS NPs (FeS DSNPs) were characterized by ultraviolet–vi…
Optical and vibrational properties of novel self-assembled silver nanocolumns are studied experimentally and theoretically. The split of the surface plasmon resonance into transverse and longitudinal modes verifies the one-dimensional character of the nanocolumns. In this work, we have identified the acoustic vibratio…
The ferroelectricity of single-domain ultrathin ${\mathrm{PbTiO}}_{3}$ films sandwiched between metallic Pt electrodes has been studied using ab initio density-functional theory (DFT) calculations within the local-density approximation. For stress-free ${\mathrm{PbTiO}}_{3}$ films with an in-plane lattice constant of…
AIMS: To investigate the influence of silica nanoparticles on the attachment and growth of Candida albicans cells. METHODS AND RESULTS: Spherical silica nanoparticles with diameters of 4, 7, 14 or 21 nm were attached to tissue culture polystyrene by a polycationic binding layer using a simple deposition procedure. The…
AIMS: In order to evaluate the part played in biocorrosion by microbial groups other than sulfate-reducing bacteria (SRB), we characterized the phylogenetic diversity of a corrosive marine biofilm attached to a harbour pile structure as well as to carbon steel surfaces (coupons) immersed in seawater for increasing tim…
High‐temperature piezoelectric (1− x )BiScO 3 − x PbTiO 3 ceramics with composition ( x =0.62, 0.63, 0.64, and 0.65) near the morphotropic phase boundary were fabricated. A thermal depoling experiment was used to investigate the stability of polarization at the temperature range from 200° to 460°C. The results indicat…
Hydroxypyridinone (HOPO)-based Gd(III) complexes have previously been shown to exhibit high relaxivity, especially at the high magnetic fields that are clinically relevant for present and future clinical use. This is due to more than one coordinated water molecule exchanging rapidly with bulk solvent. These complexes,…
This paper describes a generic method for the site-specific attachment of lanthanide complexes to proteins through a disulfide bond. The method is demonstrated by the attachment of a lanthanide-binding peptide tag to the single cysteine residue present in the N-terminal DNA-binding domain of the Escherichia coli argin…
Abstract Self‐supported asymmetric hollow‐fiber membranes of mixed oxygen‐ionic and electronic conducting perovskite Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3‐δ (BSCF) were prepared by a combined phase‐inversion and sintering technique. The starting inorganic powder was synthesized by combined EDTA–citrate complexing process fo…
Electrostatic aggregation of oppositely charged silver and gold nanoparticles leads to the formation of core-shell clusters in which the shell is formed by the nanoparticles, which are in excess. Arguments based on Debye screening of interactions between like-charged particles help explain why these clusters are stabl…
The individual solubilization of single-walled carbon nanotubes (SWNTs), achieved by using ten different anionic-, zwitterionic-, and nonionic-steroid biosurfactants and three different sugar biosurfactants, was examined. Aqueous micelles of anionic cholate analogues, such as sodium cholate (SC), sodium deoxycholate (…
Chemically reducible micro- and mesoporous Ti oxides with controlled pore sizes from 12 to 26 A were synthesized. The hydrogen storage and adsorption capacity at 77 K was tested as a function of surface area, pore size, and reducing agent. Surprisingly, the oxidation state of the surface Ti species had an even greater…
We present the results of computer simulations of model polymer networks containing stiff and roughly spherical colloidal particles at 20% volume fraction. We employ the coarse-grained “dissipative particle dynamics” model (DPD). The filler particles may be either well dispersed or aggregated, and the strength of thei…