Materials Literature
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In this paper we present a novel and facile method to fabricate polystyrene/nickel (PS/Ni) nanocomposite spheres. In this approach, the negatively charged PS colloids bearing −COOH groups on the surfaces were used as templates, and the Ni 2+ ions and a small amount of Ag + ions were then adsorbed onto the surfaces of…
Small-angle neutron scattering (SANS), cryogenic transmission electron microscopy (cryo-TEM), and dynamic light scattering (DLS) were used to study the metal-dependent phase behavior of microbially produced surfactants-marinobactins B, D, and E (MB, MD, and ME). Marinobactins A-E are siderophores that facilitate Fe(II…
Aqueous-organic two-phase systems are important tools in organic synthesis to enable reactions that employ compounds with incompatible solubilities. For technical application, different strategies have been developed to prevent coalescence without vast energy input and deactivation of sensitive compounds. A particular…
CgNa (Condylactis gigantea neurotoxin) is a 47-amino-acid- residue toxin from the giant Caribbean sea anemone Condylactis gigantea. The structure of CgNa, which was solved by 1H-NMR spectroscopy, is somewhat atypical and displays significant homology with both type I and II anemone toxins. CgNa also displays a conside…
Recently it was discovered that a total of $5.6\phantom{\rule{0.3em}{0ex}}\mathrm{wt.}\phantom{\rule{0.2em}{0ex}}%$ ${\mathrm{H}}_{2}$ could be released from the 1:2 mixture of lithium amide and magnesium hydride at temperatures as low as $150\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. W…
In this work, we performed a detailed study of the Raman spectra of double-wall carbon nanotube (DWNT) bucky paper samples. The effects of ${\mathrm{H}}_{2}\mathrm{S}{\mathrm{O}}_{4}$ doping on the electronic and vibrational properties of the DWNTs are analyzed and compared to the corresponding effects on single-wall…
Water plays an important role in the structure and function of biomolecules. Water confined at the nanoscale usually exhibits phenomena not seen in bulk water, including the ice-like ordering structure on the surfaces of many substrates. We investigate the behaviour of protein folding in which the proteins are assumed…
Abstract Poly[di(2,5‐dimercapto‐1,3,4‐thiadiazole)]‐metal complexes of Co(II), Ni(II), Cu(II), and Zn(II) were synthesized by the reaction of 2,5‐dimercapto‐1,3,4‐thiadiazole (6.6 mmol) with anhydrous cobalt, nickel, copper, and zinc chlorides (3.3 mmol) in absolute ethanol under reflux for 24 h. The products were cha…
This article reports the modification of Al2O3/GaAs surfaces with multifunctional soft materials. Siloxane elastomers were covalently bound to dopamine-modified Al2O3/GaAs semiconductor surfaces using MPt (M = Fe, Ni) nanoparticles. The sizes of the monodisperse FePt and NiPt nanoparticles were less than 5 nm. The sur…
Alternating poly(m-p-aniline) can be oxidized to radical cations with spins S = 1/2. For high spin density, ferromagnetic spin interaction is observed, and some of the generated radical cations are found to be in a ground triplet state.
In the present study 3D finite element (FE) analysis has been used to evaluate Young's modulus, shear modulus and coefficient of thermal expansion (CTE) of single-walled carbon nanotubes (SWCNTs). Both armchair and zigzag SWCNTs have been analyzed and some important observations have been made in regard to dependence…
Abstract Using a complementary pair of simple alkylthiolates with hydrogen‐bonding moieties, functionalized Au 55 clusters could be selectively deposited onto self‐assembled monolayers on gold that carry the opposite functionality. The deposition can be readily controlled by the medium in which the clusters are dissol…
A tunable near-field superlens (NFSL) from metal-dielectric composites has advantages over that one from bulk metal. In this paper, we realize the tunable NFSL by tuning the shape of granular inclusions. It is found that the tunability of NFSL can be enhanced by adjusting both the volume fraction and the particles' sh…
Abstract Cadmium sulfide (CdS) nanocrystals continue to generate scientific and technological interest, owing to their valuable optical, electronic, and chemical properties. Aqueous nanocrystal syntheses rely on functional capping agents to control nanocrystal form and function. We present a series of linear and dendr…
The valence optical excitation spectra of the gold clusters series Au 6 4 +, Au 44 4+, and Au 146 2+ have been calculated at the scalar relativistic time dependent density functional theory level. Optical spectra have been calculated at the optimized geometries, the electronic structure has been described in terms of…
Vapor-grown carbon nanofibers (VGCNF) were functionalized with amine-containing pendants via a Friedel−Crafts acylation reaction with 4-(3-aminophenoxy)benzoic acid. The resulting H 2 N−VGCNF with relatively high degree of functionalization was in attendance during the synthesis of a polyimide (previously designated a…
Abstract The threefold symmetric molecule, tris(4‐cyanophenyl)amine (TCPA) is synthesized from 4‐fluorocyanobenzene by treatment with potassium carbonate in dimethylsulfoxide; the occurrence of the reaction without any amine reagent suggests the involvement of a novel self‐assembly process. A reprecipitation strategy…
Ein Tandemkatalysator für die Suzuki-Kupplung aktivierter oder desaktivierter Arylchloride mit Arylboronsäuren in Wasser und für die Phenolsynthese ausgehend von Arylchloriden in Wasser/Dioxan (1:1) entstand durch das Aufbringen von Palladiumnanopartikeln auf Polyanilin-Nanofasern (PANI; siehe TEM-Bild). So wurde 2-Ph…
We report computation results obtained from extensive coarse-grained molecular-dynamics simulations of amorphous ensembles of polymer chains at constant density. In our polymer model, we use bending and torsion potentials acting along the polymer backbone to control the chain stiffness. The static and dynamic properti…
We calculated the optical response of metallic and insulating VO 2 using the local density approximation (LDA) approach. The band structure calculation was based on the full-potential linear-muffin-tin method. The imaginary part of the dielectric function ε 2 (ω) is related to the different optical transitions. The Dr…