Materials Literature
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We report on the synthesis and spectroscopic characterization of well-defined hybrid structures that consist of a gold core overcoated with a silica shell, followed by a dense monolayer of CdSe nanocrystal quantum dots (QDs). The dielectric silica spacer of a controlled thickness provides a simple means for tuning int…
A method established in the present study has proven to be effective in the synthesis of Mn(2)O(3) nanocrystals by the thermolysis of manganese(III) acetyl acetonate ([CH(3)COCH=C(O)CH(3)](3)-Mn) and Mn(3)O(4) nanocrystals by the thermolysis of manganese(II) acetyl acetonate ([CH(3)COCH=C(O)-CH(3)](2)Mn) on a mesoporo…
A new gold-nanoparticle (AuNP)-based sensor for detecting Hg(II) ions in aqueous solution has been developed. Rhodamine B (RB) molecules that are highly fluorescent in bulk solution fluoresce weakly when they are adsorbed onto AuNP surfaces as a result of fluorescence resonance energy transfer and collision with AuNPs…
We introduce a dual-functional biocompatible material based on zwitterionic poly(carboxybetaine methacrylate) (polyCBMA), which not only highly resists protein adsorption/cell adhesion, but also has abundant functional groups convenient for the immobilization of biological ligands, such as proteins. The dual-functiona…
1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD), N -methyl-TBD (MTBD), and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) are effective organocatalysts for the ring-opening polymerization (ROP) of cyclic esters such as lactide (LA), δ-valerolactone (VL), and ε-caprolactone (CL). TBD is shown to polymerize LA, VL, and CL in a fast…
We report a theoretical analysis for the experimental specific heat C(T) data of the perovskite manganites LaMnO 3+δ , with δ=0.11, 0.15 and 0.26, in the temperature domain 4≤T≤10 K . Calculations of C(T) have been made within the two-component scheme: one is the Fermionic and the other is Bosonic (phonon or magnon) c…
Syntheses of new benzophenone-containing fatty acids (FABPs) 1, 5, and 6 and a new route to FABP 3 are described. Combined with the known 2 and 4, these FABPs comprise a set of photoactivatable fatty acid analogues with the crosslinking site at defined distances from the carboxylic acid hydroxyl group oxygen atoms ran…
Singledasein: Die UV/Vis-Spektren und die starke Fluoreszenzemission von trifluorethoxysubstituierten Zinkphthalocyaninen, die mit Desoxyribonucleosiden konjugiert sind (siehe Bild), legen die Vermutung nahe, dass diese Verbindungen monomere Formen einer Aggregation vorziehen. Ihre einzigartige Photoempfindlichkeit lä…
The crosslinking of polymers in a polymeric material will alter the mechanical properties of the material. Control over the mechanical properties of polyelectrolyte multilayer films (PEMs) could be useful for applications of the technology in medicine and other areas. Disulfide bonds are 'natural' polypeptide crosslin…
Magnetization and magnetostriction measurements in pulsed magnetic fields reaching $600\phantom{\rule{0.3em}{0ex}}\mathrm{kOe}$ reveal strong magnetoelastic effects in ${\mathrm{Er}}_{5}{\mathrm{Si}}_{4}$ at low temperature. A clear hysteretic behavior of the magnetization isotherms and sharp first-order-type anomalie…
UV-induced graft polymerization is a simple and effective method for the surface modification and functionalization of polymeric materials. The structure of poly(acrylic acid) (PAAc) grafted onto a polymeric surface by UV-induced graft polymerization of acrylic acid was investigated using optical waveguide spectroscop…
Monosized strontium titanate (SrTiO 3 ) particles with tailored morphologies have been successfully synthesized using ultrasound irradiation. Characterization techniques such as X‐ray powder diffraction analysis, scanning electron microscopy, energy‐dispersive analysis of X‐rays, and laser particle size analysis were…
Recrystallization of the unstructured dye acid green 27 (AG27) in a mixed solvent of alcohol (ethanol or methanol) and water was systematically studied. The results demonstrated that AG27 crystals with uniform sizes and controllable shapes can be produced by simply changing the volume ratio of ethanol (or methanol) an…
We report on minimum energy calculations, using a convenient Lennard-Jones expression of the van der Waals intermolecular potential, to derive the optimum configurations of ${\mathrm{C}}_{60}$ molecules inside single wall carbon nanotubes. Depending on the diameter of the nanotube, ${\mathrm{C}}_{60}$ molecules were f…
The effects of partial substitution of Mn by Cu and calcination temperature on the physiochemical and catalytic properties of La 0.8 K 0.2 Cu x Mn 1 - x O 3 catalysts for the simultaneous removal of NO x and soot were investigated. The XRD, SEM, and BET techniques were used to characterize the catalysts, and temperatu…
Abstract Monte Carlo computer simulations of single, flexible, self‐avoiding chains on a cubic lattice have been performed upon conditions of increasing segment–segment cohesive energy (deteriorating solvent quality). The simulations spanned a wide range of chain lengths (20–10,000, i.e., up to molecular weights of a…
Single-wavelength anomalous diffraction (SAD), multiwavelength anomalous diffraction (MAD) and single isomorphous replacement with anomalous scattering (SIRAS) phasing at ultra-high X-ray energy, 55 keV, are used successfully to determine a high-quality and high-resolution experimental electronic density map of hen eg…
This paper presents a set of surfactant-selection guidelines that can be used to design bio-based semi-synthetic metalworking fluid (MWF) microemulsions as a renewable alternative to conventional petroleum formulations. Ten surfactant classes (six anionic and four nonionic) with different head and tail structures and…
Abstract Recent differential scanning calorimetry (DSC) results on polystyrene–solvent mixtures show two distinct glass transitions whose positions and widths vary with composition. Parallel work on the dynamic response in polymer blends has focused on how segmental mobilities are controlled by local composition varia…
Abstract We model the temperature dependent conformational changes and orientational and translational ordering of isotactic polypropylene melt in the vicinity of its melting temperature. We use the coarse grained second nearest neighbor lattice model, which has previously been shown to properly model the liquid state…