Materials Literature
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A new complex (1) of Prussian blue analogue with the composition of K0.2Mn1.4Cr(CN)6 x 6H2O was prepared and characterized structurally as well as magnetically. The crystal structure of complex 1 was determined by X-ray diffraction analysis. The results indicate that complex 1 consists of a 3D cubic lattice similar to…
Single-walled carbon nanotubes are covalently functionalized by conjugated polyacetylenes through their cyclization reactions with poly(1-phenyl-1-alkyne) and poly(diphenylacetylene) derivatives carrying azido functional groups at the ends of their alkyl pendants. The resultant polyene nanotube addends are soluble in…
We present a detailed account of the physics of vanadium sesquioxide $({\mathrm{V}}_{2}{\mathrm{O}}_{3})$, a benchmark system for studying correlation-induced metal-insulator transition(s). Based on a detailed perusal of a wide range of experimental data, we stress the importance of multiorbital Coulomb interactions i…
Multifunctional carbon nanofibers (CNFs, see picture), fabricated by a simple electrospinning method, show not only outstanding conductive and magnetic but also superhydrophobic characteristics, which make these materials attractive for the application as corrosive protection and electromagnetic shielding coating. The…
We have investigated experimentally and theoretically the phonon-dispersion curves along the $\overline{\ensuremath{\Gamma}}\text{\ensuremath{-}}\overline{M}$ axis in two-dimensional surface Brillouin zones of the stable and metastable $\mathrm{B}{\mathrm{C}}_{3}$ honeycomb sheets with different lattice constants. Mos…
The compound ${\mathrm{Nd}}_{7}{\mathrm{Rh}}_{3}$, crystallizing in the ${\mathrm{Th}}_{7}{\mathrm{Fe}}_{3}$-type hexagonal structure, was previously known to exhibit two magnetic transitions, one at $32\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ and the other at $10\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ (in a zero magneti…
In our ongoing investigations of heteropolyniobate chemistry, a phase featuring decorated, A-type trivacant alpha-Keggin ions linked by their charge-balancing sodium cations has been isolated and structurally characterized. This is the first heteropolyniobate reported that has a true lacunary structure type. Na15[(PO2…
Electronic absorption spectra of six porphyrin-like photosensitizers, porphyrin, chlorin, bacteriochlorin, pheophytin a, porphyrazin, and texaphyrin, have been calculated within the time-dependent DFT framework (TDDFT) in conjunction with the PBE0 hybrid functional. Energetic and orbital aspects are discussed by compa…
Epidermal growth factor (EGF)-conjugated copolymer micelles were prepared from a mixture of diblock copolymers of methoxy poly(ethylene glycol)-block-poly(delta-valerolactone) (MePEG-b-PVL) and EGF-PEG-b-PVL for targeted delivery to EGF receptor (EGFR)-overexpressing cancers. The block copolymers and functionalized bl…
The systematic comparison of the atomic structure of solid compounds has become an important task in crystallography, chemistry, physics and materials science, in particular in the context of structure prediction and structure determination of crystalline solids. In this work, an efficient and robust algorithm for the…
A relationship between conformation and photophysics of poly[2-methoxy-5-(2‘-ethylhexoxy)- p -phenylenevinylene] (MEH−PPV) in dilute solution was investigated by utilizing UV/vis absorption, excitation, and emission spectroscopy. By tuning polymer−solvent interactions, a control of conjugation length which relates to…
Powder diffraction data collected on a nanocrystalline ceria sample within a round robin conducted by the IUCr Commission on Powder Diffraction were analysed by two alternative approaches: (i) whole-powder-pattern modelling based upon a fundamental microstructural parameters approach, and (ii) a traditional whole-powd…
The reaction of the mixed-metal lanthanide/magnesium allyl complexes [Ln( η 3 -C 3 H 5 ) 3 ( μ -C 4 H 8 O 2 )·Mg( η 1 -C 3 H 5 ) 2 ( μ -C 4 H 8 O 2 ) 1.5 ] n (Ln = La, 1; Y, 2 ) with the diketimine 2-(2,6-diisopropylphenyl)amino-4-(2,6-diisopropylphenyl)imino-2-pentene (BDI-H) in THF at 60 °C leads to the isolation of…
Hydrogenation and posthydrogenation annealings have been used as a very efficient tool to tune the hole density over a wide range, at fixed magnetic moment concentration, in thin GaMnAs layers. Reduction of the hole density resulted in strong modifications of their ferromagnetic properties. In particular, we observed…
A new software package, DISTL ( Diffraction Image Screening Tool and Library ), for the rapid analysis of X-ray diffraction patterns collected from macromolecular crystals is presented. Within seconds, the program characterizes the strength and quality of the Bragg spots, determines the limiting resolution of the imag…
Absolute calibration relates the measured (arbitrary) intensity to the differential scattering cross section of the sample, which contains all of the quantitative information specific to the material. The importance of absolute calibration in small-angle scattering experiments has long been recognized. This work detai…
We report on a complex nontrivial behavior of the optical anisotropy of quantum dots that is induced by a magnetic field in the plane of the sample. We find that the optical axis either rotates in the opposite direction to that of the magnetic field or remains fixed to a given crystalline direction. A theoretical anal…
In a recent Letter Lee et al. studied the spin 1/2 photoluminescence-detected magnetic resonance (PLDMR) of a soluble derivative of poly-phenylene vinylene [MEH-PPV] and argued that it originates from the interaction of triplet excitons with polarons. We show that in MEH-PPV as well as in other conjugated polymers the…
We designed and performed low temperature DC transport characterization studies on two-dimensional electron gases confined in lattice-matched In$_{0.53}$Ga$_{0.47}$As/In$_{0.52}$Al$_{0.48}$As quantum wells grown by molecular beam epitaxy on InP substrates. The nearly constant mobility for samples with the setback dist…
Model calculation and experimental data of circularly-polarized-light-dependent photocurrent in a n-AlGaAs/p-InGaAs/p-GaAs heterostructure are reported. It is found that, under the appropriate forward bias condition, spin voltaic effect (SVE) can survive across the heterojunction and give rise to detectable polarizati…