Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Eine sechskernige Dysprosium(III)-Verbindung aus zwei Dy3-Dreieckeinheiten mit gegenüberliegenden Kanten (Dy violett, C grau, N blau, O rot) behält ihren nichtmagnetischen Grundzustand bei und verhält sich wie ein Einzelmolekülmagnet. Diese Struktur und starke Kopplungen über das μ4-O2−-Ion stabilisieren eine ähnliche…
We report on the first single emitter fluorescence spectra of DNA-stabilized silver clusters (Ag:DNAs) at ambient and cryogenic temperatures. While Ag:DNAs have received much attention recently due to their sequence-tunable emission wavelengths, the nature of the optical transitions (molecule-like or collective, clust…
Abstract Flexible magnetoelectric 0–3 composite films formed with high dielectric (ε r ∼ 104) CuO microparticles in a polyvinylidene fluoride (PVDF) polymer matrix showed multifunctional properties. The films prepared by the hot-moulding technique exhibit low-loss high relative permittivity (ε eff ∼ 103) with good fer…
We report the emergence of the D band Raman mode in single-walled carbon nanotubes under large axial strain. The D to G mode Raman intensity ratio (I D/I G) is observed to increase with strain quadratically by more than a factor of 100-fold. Up to 5% strain, all changes in the Raman spectra are reversible. The emergen…
In this paper fluorescent magnetic Fe(3)O(4)@m-SiO(2)@YPO(4):Tb(3+) particles with a size of 52 nm have been prepared and characterized. The surface of the nanoparticles was modified with β-cyclodextrin and folic acid using glutathione as a linker. The hydrophobic anticancer drug 5-fluorouracil (5-FU) was successfully…
Synthesis of the title compounds has been achieved through refinement of a recently reported synthetic protocol whereby varying equivalents of MeMgBr are reacted with 1,4-dioctylphthalonitrile to produce mixtures favoring specific hybrid structures. The initially formed magnesium-metalated compounds are obtained as pu…
Geschwindigkeit ist alles: Damit ein Azofarbstoff für die Echtzeit-Datenübermittlung geeignet ist, muss er nach Photoisomerisierung in seine metastabile cis-Form eine schnelle thermische Isomerisierung zurück zur trans-Form eingehen. Das gezeigte Azopyrimidin hat eine Relaxationszeit τ von nur 40 ns unter physiologisc…
In this work, a cylindrical-substrate array for surface-enhanced Raman scattering (SERS) measurements was developed to enable analysis of nucleobases in a few microliters of liquid. To eliminate uncertainties associated with SERS detection of aqueous samples, a new type of cylindrical SERS substrate was designed to co…
The new furnace at the Materials Characterization by X-ray Diffraction beamline at Elettra has been designed for powder diffraction measurements at high temperature (up to 1373 K at the present state). Around the measurement region the geometry of the radiative heating element assures a negligible temperature gradient…
The stability and association of polymer-fullerene films upon thermal annealing depends strongly on exposure to light, even at ambient conditions. As a result, dewetting of nanocomposite films can be prevented and the characteristic lengthscales of phase separated morphologies finely tuned. Coupling photopatterning wi…
We examined the formation of the ternary complex hydride phase Mg 2 FeH 6 during the thermal hydrogen absorption of a ball-milled powder mixture of MgH 2 and Fe. Analytical measurements, scanning transmission electron microscopy, and electron energy-loss spectroscopy, with the sample cooled to liquid nitrogen temperat…
Herein, we report the emergence of multicolor photoluminescence in a mixed-valence manganite nanoparticle La 0.67 Sr 0.33 MnO 3 (LSMO NP) achieved through electronic structural modification of the nanoparticles upon functionalization with a biocompatible organic ligand, sodium tartrate. From UV–vis absorption, X-ray p…
Sequential vapour infiltration operated in an atomic layer deposition (ALD) reactor was used to controllably deliver precursors of TiO2 into the cores of micellar films of the amphiphilic block copolymer, poly(styrene-block-4-vinylpyridine) (PS-b-P4VP). Vaporized precursors diffused through the PS corona and were excl…
Easy as π: A stable nonaromatic heteroporphyrin bearing a thienopyrrole moiety has been prepared. The nonaromatic nature of this compound is clearly evident based on UV/Vis absorption, 1H NMR spectroscopy, and theoretical calculations. Single-crystal X-ray analysis demonstrates that the molecule adopts a planar confor…
The electronic properties of tetrathiafulvalene (TTF) can be tuned by attaching electron-donating or electron-withdrawing substituents. An electron-rich macrocyclic polyether containing two TTF units of different constitutions, namely 4,4'-bis(hydroxymethyl)tetrathiafulvalene (OTTFO) and 4,4'-bisthiotetrathiafulvalene…
The influence of gold nanoparticle concentration on signatures of localized surface plasmon mediated Förster resonant energy transfer is investigated in a quantum dot–gold nanoparticle sandwich structure. At lower gold nanoparticle concentrations, localized surface plasmon mediated Förster resonant energy transfer enh…
Photochromic compounds change colour on exposure to light, while the reversion may be attributable either to radiation or may be thermal. The use of photochromism on fabrics can provide new opportunities to develop smart textiles; for example, sensors and active protective clothes. Ethyl cellulose‐1,3‐dihydro‐1,3,3,4,…
Lewis acids promote the polymerization of several 2-chloroalkylenedioxythiophenes, providing high-molecular-weight conjugated polymers. The proposed mechanism is a cationic chain-growth polymerization, as confirmed by end-capping reactions and a linear correlation of molecular weight with percent conversion. The "livi…
Blue (<480 nm) emitting Cd-free quantum dots (QDs) are in great demand for various applications. However, their synthesis has been challenging. Here we present blue emitting InP/ZnS core/shell QDs with a band edge emission of 475 nm and a full width at half maximum of 39 nm (215 meV) from their quantum confined states…
Abstract Few‐layer graphene‐like sheets of MoS2, WS2, MoSe2 and WSe2 were prepared by employing two methods. The first method uses microwave synthesis in ethylene glycol or water medium and the second method involves laser irradiation of the bulk samples dispersed in dimethylformamide. The few‐layer dichalcogenide sam…