Materials Literature
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Acid–base co-crystallization has been used to control the photochromic reactivities of salicylideneaniline derivatives in co-crystals. The series of co-crystals N -salicylidene-3-carboxyaniline ( 1 ) with 2-aminopyridine ( a ), guanylthiourea ( b ), cytosine ( c ), 4,4′-bipyridyl ( d ), piperazine anhydrous ( e ), 1,3…
We propose deep-subwavelength optical waveguides based on metal–dielectric multilayer indefinite metamaterials with ultrahigh effective refractive indices. Waveguide modes with different mode orders are systematically analyzed with numerical simulations based on both metal–dielectric multilayer structure…
Abstract: In this work, the viscoplastic behaviour of 6082‐T6 and 7075‐T6 aluminium alloys is examined over a wide range of strain rates. Three different testing techniques were applied to this investigation: low‐rate experiments were performed using a regular servo‐hydraulic testing machine, high‐rate tests were cond…
A self-assembled cage compound consisting of four concave ligands and two square-planar-coordinated Pd(II) ions was found to quantitatively encapsulate a hexamolybdate dianion [Mo(6)O(19)](2-) in solution. The addition of 1 equiv more of [Mo(6)O(19)](2-) to the inclusion complex resulted in the formation of a precipit…
A series of dicarboxylic quinoline derivatives bearing electron-releasing or -withdrawing substituents have been synthesized using mono- or/and biphasic methodologies. By controlling the regioselectivity of addition into our electrophilic intermediate, we also characterized by which mechanism the Doebner-Miller cycliz…
The effect of impurities and LiF sintering additive on the microstructure and optical properties of hot‐pressed transparent MgAl 2 O 4 spinel was investigated. A lower and a higher purity powder were hot pressed with and without LiF and process parameters varied. Microstructure was examined using optical and electron…
A pH indicator: Near-infrared emitting lanthanide-functionalized gold nanoparticles have been prepared through self-assembly at the gold surface between a ytterbium(III)–cyclen complex and xylenol orange (see picture). Excitation of the xylenol orange unit with visible light, up to 600 nm, results in the sensitization…
The effects of phosphorus doping on the structural and superconducting phase transitions of ${\mathrm{BaNi}}_{2}({\mathrm{As}}_{1\mathrm{\text{\ensuremath{-}}}x}{\mathrm{P}}_{x}{)}_{2}$ were studied. The specific heat, resistivity, and magnetic susceptibility were measured. The results revealed an abrupt increase in t…
The intrinsic properties of initially p-type doped graphene (grown by chemical vapor deposition (CVD)) can be recovered by buffered oxide etch (BOE) treatment, and the dominant factor governing p-type doping is identified as the H(2)O/O(2) redox system. Semi-ionic C-F bonding prevents the reaction between the products…
Positively charged nanoparticles to be used as substrates for surface-enhanced Raman scattering (SERS) were prepared by coating citrate-reduced silver nanoparticles with the cationic polymer poly-l-lysine. The average diameter of the coated nanoparticles is 75 nm, and their zeta potential is +62.3 ± 1.7 mV. UV-vis spe…
Many lizards are able to undergo scar-free wound healing and regeneration following loss of the tail. In most instances, lizard tail loss is facilitated by autotomy, an evolved mechanism that permits the tail to be self-detached at pre-existing fracture planes. However, it has also been reported that the tail can rege…
Lysine-based polycations are widely used as nonviral carriers for gene delivery. This manuscript reports the results of a comparative study on the in vitro cytotoxicity of a library of three structural polylysine variants, namely, linear polylysine (LPL), dendritic polylysine (DPL), and hyperbranched polylysine (HBPL)…
The nonretarded size-dependent Hamaker constant for spherical silver nanoparticles was calculated by using the Lifshitz theory. The size dependence of the Hamaker constant was taken into account based on the size effect of the dielectric permittivity of silver nanoparticles. The experimental data for bulk silver diele…
biomass nanocrystals in tissue engineering scaffolds, drug delivery, electronic components and devices. This review is aim at presenting a summary on recent development of cellulose nanocrystals applied in advanced polymer-based nanocomposites using the novel fabrication strategies for targeting nanocomposite hydrogel…
Photochemical charging of colloidal ZnO nanocrystals has been studied using continuous-wave and time-resolved photoluminescence spectroscopies in conjunction with electron paramagnetic resonance spectroscopy. Experiments have been performed with and without addition of alcohols as hole quenchers, focusing on ethanol.…
A new acid-degradable polymer–platinum conjugate was prepared by postmodification of a POEGMEMA- b -PHEMA block copolymer obtained by RAFT polymerization. A hydrazone linkage, susceptible to hydrolytic cleavage, was formed by reaction of the carbonyl group of a diamino ligand with the hydrazide-modified copolymer. Acc…
Novel supramolecular amphiphilic multiarm hyperbranched copolymers were successfully constructed through the molecular recognition of nucleobases. First, adenine-terminated H40-star-poly(ε-caprolactone)-adenine (H40-star-PCL-A) and uracil-terminated poly(ethylene glycol) (PEG-U) were successfully prepared. Due to the…
We map out the possible ordered states in bilayer graphene at the neutrality point by extending the previous renormalization group treatment of many-body instabilities to finite temperature, trigonal warping and externally applied perpendicular electric field. We were able to analytically determine all outcomes of the…
Reaction of [MoO(2)(η(2)-tBu(2)pz)(2)] with Schiff base ligands HL(X) (X = 1-5) gave molybdenum(VI) dioxo complexes of the type cis-[MoO(2)(L(X))(2)] as yellow to light brown solids in moderate to good yields. All ligands coordinate via its phenolic O atom and the imine N atom in a bidentate manner to the metal center…
A density functional theory study of substitutional carbon impurities in ZnO has been performed, using both the generalized gradient approximation (GGA) and a hybrid functional (HSE06) as exchange-correlation functional. It is found that the nonspinpolarized C${}_{\mathrm{Zn}}$ impurity is under almost all conditions…