A new route to nanorods of cadmium sulfide
We report a novel synthesis of luminescent CdS nanorods which, unusually, are predominantly of the cubic phase.
Materials Literature
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Electron delocalisation in a trinuclear copper(ii) complex: high-field EPR characterization and magnetic properties of Na3[Cu3(mal)3(H2O)]·8H2O
The complex Na3[Cu3(mal)3(H2O)] x 8H2O was obtained from evaporation of an aqueous solution containing Cu(OAc)2, malic acid (HO2CCH2CHOHCO2H) and NaOH and was characterised by X-ray diffraction on single crystal, X-band and high-field EPR spectroscopy (HF-EPR) and magnetic susceptibility measurements. The trinuclear c…
Biomolecular screening with novel organosilica microspheres
Organosilica microspheres synthesised via a novel surfactant-free emulsion-based method show applicability towards optical encoding, solid-phase synthesis and high-throughput screening of bound oligonucleotide and peptide sequences.
Coherent phonon dynamics: Br 2 in solid Ar
A long lasting coherent oscillation with a sharp frequency of f(p) = 2 THz is observed in fs pump probe spectra for B <-- X excitation of Br2 in solid argon. It exactly matches the frequency of a coherent zone boundary phonon (ZBP) of the Ar environment. The ZBPs have a vanishing group velocity v(g), thus they stay in…
Enhancement of electrochemical and photoelectrochemical properties of fibrous Zn and ZnO electrodes
Zinc and zinc oxide electrodes with fibrous morphologies were prepared to exploit their high interfacial areas and superior electrical conductivity for the enhancement of electrochemical and photoelectrochemical properties.
Nanoporous Alumina Template with In Situ Barrier Oxide Removal, Synthesized from a Multilayer Thin Film Precursor
A nanoporous alumina template made from a multilayer metal film structure has been developed that allows for the in situ removal of the electrically insulating alumina barrier layer, exposing a Pt electrode at the pore bases. This barrier-free nanoporous system is of great use for dc electrodeposition of a wide variet…
Iron(ii) and zinc(ii) monohelical binaphthyl salen complexes
A new chiral binaphthyl salen ligand with rigid polyaromatic sidearms gives monohelical complexes (Fe(II) and Zn(II)) of predetermined handedness.
Calix[4]phyrin based redox architectures: towards new molecular tools for electrochemical sensing
New redox active molecular macrocyclic architectures characterized by a direct connection between dipyrrin, tripyrrin and ferrocenyl fragments have been synthesized and characterized. Contrarily to fully conjugated porphyrins, in which four pyrrole moieties contribute to the overall aromatic pi-electronic system and b…
Copper clusters built on bulky amidinate ligands: spin delocalization via superexchange rather than direct metal–metal bonding
Entry into a new class of tetra- and dicopper clusters was assisted by a fine steric tuning of bulky amidinate ligands that provide spin-delocalizing superexchange pathways in class III mixed-valence clusters, the properties of which are best understood without invoking metal-metal bonding.
Ab initio cluster calculations for the absorption energies of F and F+ centers in bulk ZnO
We present the results of a series of ab initio calculations on the ground states and the low lying excited states of the F and F+ centers in bulk ZnO. Both types of F centers are oxygen vacancies, causing rather strong distortions of the local geometries. The calculations were performed by means of wave function base…
Luminescence Thermal Degradation Mechanism in BaMgAl[sub 10]O[sub 17]:Eu[sup 2+] Phosphor
Ba Mg Al 10 O 17 : Eu 2 + (BAM) blue phosphor was annealed in air at temperatures of 500 – 1000 ° C to investigate its thermal degradation. The photoluminescence of annealed samples was studied in ultraviolet and vacuum ultraviolet (VUV) regions, respectively. The observed Eu 3 + emission revealed that the oxidation o…
Single stage cell seeding of small diameter prosthetic cardiovascular grafts.
Small-diameter prosthetic cardiovascular bypass grafts have high occlusion rates. Thrombogenicity caused by the lack of endothelial cells (ECs) on the luminal surface of the grafts is one of the main reasons for its occlusion. One strategy to improve the clinical performance of cardiovascular prosthetic grafts has bee…
A novel iron loss calculation method on power converters based on dynamic minor loop
The authors have reported a novel iron loss calculation method based on a loss-map of the magnetic materials. A distinctive feature of this method is that the iron loss on the inductors can easily be calculated in many kinds of converters dynamically. The dynamic measuring method of the dynamic minor-magnetic loop by…
First hyperpolarizability of some nonconjugated donor–acceptor 3D molecules: noncentrosymmetric crystal through conformational flexibility
Four derivatives of 2,4,6-tris(benzylamino)-1,3,5-triazine are synthesized and detailed computational and nonlinear optical investigations are carried out. Computations indicate near degenerate conformations (C3 and C1 symmetry) in all systems in the gas phase; the dipole moments are also of similar magnitude in all o…
Ferroelectric and antiferroelectric switching behaviour in new unsymmetrical bent-core compounds derived from 3-hydroxybenzoic acid
Herein we report the synthesis and characterization of several achiral bent-core unsymmetrical compounds exhibiting mesomorphic properties. The lower homologues in two series of compounds show a columnar phase with a rectangular lattice whereas the middle homologues exhibit a novel columnar phase with an oblique latti…
Preparation and characterization of gold nanoparticles with a ruthenium-terpyridyl complex, and electropolymerization of their pyrrole-modified metal nanocomposites
The reduction of tetrachloroaurate with sodium borohydride in the presence of 2,2′:6′,2″-terpyridyloctanethiol gave terpyridine-functionalized gold nanoparticles (Tpy–Au, core size 2.0 nm). Metal complexation of Tpy–Au with ruthenium-terpyridyl trichloride, Ru(tpy)Cl3, led to new gold nanoparticles bearing the rutheni…
Assessment of Liquid Crystal Template Deposited Porous Nickel as a Supercapacitor Electrode Material
The high surface area porous nickel, obtained by template electrodeposition using a hexagonal liquid crystalline phase medium as a template was evaluated as a potential material for electrochemical capacitors using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) studies in 6 M KOH. A single el…
HLDPE/organic functionalized SiO2 nanocomposites with improved thermal stability and mechanical properties
High-pressure low-density polyethylene (HLDPE)/organic functionalized SiO2 nanocomposites were synthesized using melt-blending technique in a sigma internal mixer. The properties of the nanocomposites were studied using two different organic functional modifiers: diglycidyl ether of bisphenol-A (DGEBA) and triacetoxyv…
In situ direct bifunctionalization of mesoporous silica SBA-15
A novel bifunctional mesoporous material MA/SBA-15 has been synthesized in one pot by in situ introduction of aluminium and magnesium salts and controlling the synthesis conditions, with the framework insertion of aluminium and high dispersion of magnesia resulting in both the strong basic and acidic sites being simul…
Growth and magnetic properties of novel ferromagnetic semiconductor (Zn, Cr)Te
Magnetic properties of a novel ferromagnetic semiconductor (Zn, Cr)Te were investigated. Zn1–xCrxTe thin films, both without and with the additional hole doping by nitrogen, were grown by molecular beam epitaxy. In the magnetization measurement on Zn1–xCrxTe without carrier doping, the ferromagnetic behaviors such as…