Materials Literature
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The encapsulation of one material by another, to form core-shell particles (microcapsules), has many applications, principally the containment, protection, and distribution of an active material. This work describes the development of core-shell particles with silicone oil cores and solid silica-like shells of control…
Redox-active ferrocenyl-terminated dendrimers have been used to build robust and active interfaces in which the inherent properties of the dendrimers are preserved. The procedure is based on the preparation of a polyarylcarboxylate layer through the controlled reduction of aryldiazonium salts followed by strong adsorp…
We report the microfluidic fabrication of macroporous polymer microspheres via the simultaneous reactions within single droplets, induced by UV irradiation. The aqueous phase of the reaction is the decomposition of H(2)O(2) to yield oxygen, whereas the organic phase is the polymerization of NOA 61, ethylene glycol dim…
This paper reports a method for distinguishing the electroactivity of different types of sites on heterogeneous electrode surfaces, exemplified through studies of basal plane highly oriented pyrolytic graphite (HOPG) electrodes. By depositing a thin film of Nafion with incorporated redox species (i.e., tris(2-2′-bipyr…
Huge negative values of both the thermopower, $S=\ensuremath{-}10\text{ }\text{mV}/\text{K}$ at 10 K, and the Nernst coefficient, $\ensuremath{\nu}=\ensuremath{-}550\text{ }\ensuremath{\mu}\text{V}/\text{K}\text{ }\text{T}$ at 7.5 K, are observed for ${\text{FeSb}}_{2}$, a narrow-gap semiconductor showing strong indic…
In the last decade, hollow polyaniline nanostructures such as nanocapsules and nanotubes have attracted increasing attention due to their potential applications in electrical and optoelectronic nanodevices, sensors, supercapacitors, energy storage devices, and else where. Many strategies have been developed for their…
New supramolecular organogels based on all-trans-tri(p-phenylenevinylene) (TPV) systems possessing different terminal groups, e.g., oxime, hydrazone, phenylhydrazone, and semicarbazone have been synthesized. The self-assembly properties of the compounds that gelate in specific organic solvents and the aggregation moti…
We describe neutron scattering, NMR relaxation, and thermal transport properties of ${Z}_{2}$ spin liquids in two dimensions. Comparison to recent experiments on the spin $S=1/2$ triangular lattice antiferromagnet in $\ensuremath{\kappa}\mathrm{\text{\ensuremath{-}}}(\mathrm{ET}{)}_{2}{\mathrm{Cu}}_{2}(\mathrm{CN}{)}_…
Self-assembled semiconducting, paramagnetic polyaniline nanotubes have been synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate in aqueous medium in the presence of colloidal silica particles of an average diameter approximately 12 nm, without added acid. The electrical conductivity of…
OBJECTIVE: Nephrogenic systemic fibrosis (NSF) is a severe fibrosing disorder occurring in patients with renal insufficiency. The majority of patients with this disorder have documented exposure to magnetic resonance imaging contrast agents containing Gd. The purpose of this study was to examine the effects of gadolin…
Multilayers of sodium salt of poly(4-styrene sulfonate) (PSS) and poly(diallyl dimethyl ammonium) chloride (PDADMAC) have been built layer by layer (LbL) both at the solid/aqueous interface (solid supported) and the air/aqueous interface (liquid supported). For the solid-supported multilayers, the adsorption kinetics…
The first crystal structure of a 3 d -metal borohydride is presented. Solvent-free homoleptic manganese borohydride Mn(BH 4 ) 2 forms at ambient conditions in ball-milled mixtures of alkali metal borohydrides and MnCl 2 . It crystallizes in the trigonal crystal system with the space group symmetry P 3 1 12 and is stab…
We demonstrate herein the fabrication of novel multicompartmental biodegradable microstructures via electrohydrodynamic cospinning of two or more polymer solutions. Under optimized processing conditions, the interface between the solutions can be sustained continuously for long time intervals, yielding fibers with mul…
A facile fabrication method is presented for a super-repellent surface, in which a silicon wafer is etched with a wet chemical method and treated by a fluorinated self-assembled monolayer. This surface is composed of harshly rough nanostructures and highly dense nanoholes. The contact angle of both water and oil with…
We find through first-principles calculations that fluorine atoms topologically adsorbed on boron nitride nanotubes induce long-ranged ferromagnetic spin ordering along the tube, offering strong spin polarization around the Fermi level. The spin polarization and magnetic moment increase significantly with decreasing t…
We report an approach to fabricating patterned horizontal ZnO nanowire arrays with a high degree of control over their dimensionality, orientation, and uniformity. Our method combines electron beam lithography and a low temperature hydrothermal decomposition. This approach opens up possibilities to fabricate ZnO NW ar…
Heterogeneous photocatalysts have both potential and demonstrated applications for use in the water-splitting reaction that produces hydrogen, the degradation of organic pollutants, the surface wettability conversion, etc. In this feature article, we have focused on the in-site observation of various reactive oxygen s…
Quantum dots (QDs) containing surface carboxylic groups have been successfully modified using biotinylated glycopolymer and carbohydrate/biotin reagents via EDC coupling. The biotinylated glycopolymer was synthesized in controlled dimension via the reversible addition-fragmentation chain transfer (RAFT) polymerization…
Nuclear shieldings, including the Fermi contact and pseudocontact terms, have been calculated with DFT methods in a variety of open-shell molecules (nitroxides, aryloxyl and various transition-metal complexes), thereby predicting (1)H and (13)C chemical shifts. In general, when experimental data are reliable a good ag…
Several improvements have been introduced for the Fourier modal method in the last fifteen years. Among those, the formulation of the correct factorization rules and adaptive spatial resolution have been crucial steps towards a fast converging scheme, but an application to arbitrary two-dimensional shapes is quite com…