Materials Literature
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The crystals Gd 2 SiO 5 and Yb ‐doped Gd 2 SiO 5 were grown by Czochralski method successfully. Dielectric properties of the two crystals were investigated in the temperature range from 100 to 1100 K and the frequency range from 20 Hz to 10 MHz. Our results revealed that these crystals show intrinsic dielectric behavi…
Abstract Powder samples and single crystals of the new ternary compound NbRuB were synthesized by arc‐melting of the elements in a water‐cooled crucible under an argon atmosphere. The samples have been characterized by X‐ray diffraction and energy‐dispersive X‐ray spectroscopy (EDX) measurements. Furthermore, the crys…
The effect of filler addition on the grain coarsening characteristics of block copolymer materials is analyzed for the particular case of a lamellar poly(styrene- b -isoprene)-type block copolymer and polystyrene as well as polystyrene-grafted nanoparticle fillers. Filler addition is shown to reduce the rate of grain…
Large third-order nonlinearity and transparency in the mid-infrared region are the basic motivations for prospective applications of chalcogenide glasses in nonlinear photonics and laser technologies. We present the state-of-the-art and our recent results of measurement and evaluation of the nonlinear optical constant…
Structural relaxation of As-Se glasses through the glass-to-supercooled liquid transition interval is studied with temperature-modulated differential scanning calorimetry. It is shown that connectivity of glass network and long-term physical ageing change not only the full width at half maximum of the out-of-phase com…
Two mole percentage Er ‐doped ( K 0.5 Na 0.5 ) 1 − x Li x NbO 3 ceramics have been prepared and their dielectric, ferroelectric, and photoluminescence ( PL ) properties have been investigated. Under an excitation of 980 nm, the ceramics exhibit intense up‐conversion luminescent emission at 548 nm (green), weak emissio…
This paper reports an efficient synthetic protocol to produce Au29(SR)20 in a CO-reduction method by adjusting the dielectric constant of mixed solvent to influence the formation kinetics of thiolate-protected Au nanoclusters.
Wear resistance of ceramics can be improved by suppressing fracture, which can be accomplished either by decreasing the grain size or by reducing the size of the deformation zone. We have combined these two strategies with the goal of understanding the atomistic mechanisms underlying the plasticity‐controlled friction…
Standard preclinical assessments in vitro often have limitations regarding their transferability to human beings, mainly evoked by their nonhuman and tissue-different/nontissue-specific source. Here, we aimed at employing tissue-authentic simple and complex interactive fibroblast-epithelial cell systems and their in v…
Described is the development of 8-azacoumarin-4-ylmethyl groups as aqueous photolabile protecting groups. A key feature of the strategy is the isosteric replacement of the C7-C8 enol double bond of the Bhc derivative with an amide bond, resulting in conversion of the chromophore from coumarin to 8-azacoumarin. This st…
The self-assemblies of diphenylalanine and its tyrosine analogues have been investigated. The peptide Boc-Phe-Phe-OMe ( 1 ), having a sequence identity with the central hydrophobic cluster (CHC) of Alzheimer’s β-amyloid diphenylalanine motif, self-assembles to produce twisted fibrils. In contrast, the tyrosine-modifie…
In nature, a frog can easily rest on a lotus leaf even though the frog's weight is several times the weight of the lotus leaf. Inspired by the lotus leaf, we fabricated a planar superhydrophobic microboat (SMB) with a superhydrophobic upper surface on a PDMS sheet which was irradiated by a focused femtosecond laser. T…
Shape‐memory nanocomposites are reported, in which super‐paramagnetic iron oxide nanoparticles (SPIONs) serve as both the crosslinks of a macromolecular network and inductive heating elements. SPIONs capped with polymerizable groups are synthesized in a one‐step reaction by oxidation of Fe(acac) 3 in the presence of 5…
Abstract (SiTe) 2 (Sb 2 Te 3 ) n phase‐change superlattices were investigated theoretically and experimentally. Ab‐initio first principle simulations predicted that the (SiTe) 2 (Sb 2 Te 3 ) n structures are stable and possess a Dirac semimetal‐like band structure. Calculation of the Z 2 invariant indicated that the s…
Photoexcited carrier relaxation is a recurring topic in understanding the transient conductivity dynamics of graphene-based devices. For atomically thin graphene oxide (GO), a simple free-carrier Drude response is expected to govern the terahertz (THz) conductivity dynamics--same dynamics observed in conventional CVD-…
Uniform hollow superparamagnetic poly(lactic-co-glycolic acid) (PLGA)/Fe(3)O(4) composite microspheres composed of an inner cavity, PLGA inner shell and Fe(3)O(4) outer shell have been synthesized by a modified oil-in-water (O/W) emulsion-solvent evaporation method using Fe(3)O(4) nanoparticles as a particulate emulsi…
A reactive extrusion process was developed to fabricate polymer/graphene nanocomposites with good dispersion of graphene sheets in the polymer matrix. The functionalized graphene nanosheet (f‐GNS) activated by diphenylmethane diisocyanate was incorporated in thermoplastic polyester elastomer (TPEE) by reactive extrusi…
Narrowly dispersed raspberry-like SiO 2 @poly(dopamine acrylamide- co -methacrylic acid- co -ethylene glycol dimethacrylate)/Ag (or SiO 2 @PDA/Ag) composite nanospheres were synthesized via a combination of sol–gel reaction, distillation-precipitation polymerization, reactive ester-amine reaction, and electroless meta…
Direct coagulation casting of alumina suspension via controlled release of high valence counter ions ( DCC – HVCI ) using calcium citrate as coagulating agent was reported. Hydrolysis of glycerol diacetate shifts the pH of suspension to weakly acidic region which helps to decompose calcium citrate and release calcium…
Results of ab initio study of magnetism and transport properties of charge carriers in zigzag graphene nanoribbons (ZGNR) on hexagonal boron nitride (h-BN(0001)) substrate are presented within the density functional theory framework. Peculiarities of the interface band structure and its role in the formation of magnet…