Materials Literature
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Platinum nanoparticles with nominal diameters of 28 to 105 nm were prepared by a multistep seed-mediated growth method and the surface-enhanced Raman scattering (SERS) characteristics of their aggregates were examined. In the film state, a broad but distinct UV−vis absorption band occurred at ∼330 nm, regardless of th…
In the solid oxide fuel cell (SOFC) field, the presence of silicon impurities is commonly considered to be detrimental to the performance due to segregation as silica at the grain boundaries. In this paper we demonstrate, however, that silicon doping into Ba 2 In 2 O 5 leads to a significant enhancement in the oxide i…
This is the first report demonstrating that a commercially available household consumer product produces nanoparticles in a respirable range. This report describes a method developed to characterize nanoparticles that were produced under typical exposure conditions when using a consumer spray product. A well-controlle…
The electronic and mechanical properties of the hexagonal, layered GaSe doped with Te and In have been studied using first-principles pseudopotential method within density-functional theory. The calculated elastic constants of the end compounds GaSe and InSe compare well with the available experimental and theoretical…
We calculate the phase, the temperature and the junction length dependence of the supercurrent for ballistic graphene Josephson junctions. For low temperatures we find nonsinusoidal dependence of the supercurrent on the superconductor phase difference for both short and long junctions. The skewness, which characterize…
We study the strength of the binding of 4d and 5d transition metals on a graphene sheet in the limit of high-coverage using first principles density functional theory. A database of the binding energies is presented. Our results show that the elements with low or near-half occupation of the d shell bind strongest to t…
We report the first hyperpolarizability of tryptophan (Trp) and tyrosine (Tyr) and an upper limit for that of phenylalanine (Phe), three natural aromatic amino acids. The measurements were performed with hyper-Rayleigh scattering in an aqueous Tris buffer solution at a pH of 8.5 and 150 mM salt concentration with a fu…
An indium-assisted ultrafast carbon nanotube (CNT) transfer method with a yield rate over 90% is described. Metal-coated as-transferred CNT structures exhibit excellent electrical performance that is at least one order of magnitude better than the previously published results. Shear test results show that the adhesion…
A one-dimensional (1D) to two-dimensional (2D) topotactic transformation has been proposed for the synthesis of 2D CdS nanosheets by promoting the lateral growth of 1D CdS nanobelts. The as-prepared nanosheets are single crystal with hexagonal structure, usually 20−100 nm in thickness, 20−100 μm in width, and up to se…
In this work, three-dimensional (3-D) porous scaffolds based on poly(ε-caprolactone)−poly(ethylene glycol)−poly(ε-caprolactone) (PCL-PEG-PCL, PCEC) and nano-hydroxyapatite (n-HA) were prepared by the electrospinning method. The physical−chemical properties of the composite membranes were investigated by Fourier transf…
Seeing double: Au/TiO2, in contrast to Au supported on silica and alumina, shows “double-peak” catalytic activity in partial oxidation of ethanol to acetaldehyde by molecular oxygen (see diagram). The additional low-temperature peak (indicated by the arrow) probably corresponds to the specific participation of oxygen…
Inelastic neutron scattering from superconducting (SC) $\text{Ba}{({\text{Fe}}_{0.926}{\text{Co}}_{0.074})}_{2}{\text{As}}_{2}$ reveals anisotropic and quasi-two-dimensional (2D) magnetic excitations close to ${\mathbf{Q}}_{\text{AFM}}=(\frac{1}{2}\frac{1}{2})$ - the 2D antiferromagnetic (AFM) wave vector of the paren…
In this Communication, we report the unprecedented solid-state structures for a series of zinc(II) silsesquioxane complexes. Initial catalytic data for the ring-opening polymerization of rac-lactide are also presented together with analogous heterogeneous species.
“Rollover”-cyclometalated [Pt(bipy − H)] + (bipy = 2,2′-bipyridine) can be easily generated in the gas phase via HX elimination brought about by collision-induced dissociation (CID) of the cationic complexes [Pt(X)(bipy)] + with X = CH 3, Cl; the latter as well as other [M(X)(bipy)] + complexes (M = Ni, Pd; X = CH 3,…
We report optical conductivity measurements of low resistivity ${\text{LaNiO}}_{3}$ thin films grown on ${\text{LaAlO}}_{3}$, ${({\text{LaAlO}}_{3})}_{0.3}$ ${({\text{Sr}}_{2}{\text{AlTaO}}_{6})}_{0.7}$, and ${\text{DyScO}}_{3}$ substrates, providing coherent compressive or tensile strain. The optical conductivity was…
Moderate steric repulsion within the supramolecular ribbon chains assembled by 1,2,5-telluradiazole derivatives causes a distortion of the [Te−N] 2 supramolecular synthon which removes the inversion center from the four-membered virtual ring. This geometrical feature can propagate through the lattice, creating a nonce…
An enzyme-linked analytical nanosphere sensor (ANSor) is described, responding to enzyme-substrate turnover in the vicinity of a quantum dot (QD) due to coimmobilized enzyme and pH sensitive ligand. QD capping by mercapto-alkanoic acids were rejected as a pH sensitive ligand, but with the use of a layer-by-layer assem…
We report a thorough characterization of the dielectric relaxation behavior and the ionic conductivity in the plastic-crystalline mixture of 60% succinonitrile and 40% glutaronitrile. The plastic phase can be easily supercooled and the relaxational behavior is investigated by broadband dielectric spectroscopy in the l…
To accomplish pH-controllable drug release on mesoporous carrier, one of the best ways is to graft stimuli-responsive organic molecules around mesopore outlets. In this work, the pH-responsive propyldiethylenetriamine groups (abbreviative phrase: multiamine chains) were grafted around mesopore outlets of mesoporous si…
Diamond nanoparticles (DNPs) obtained by explosive detonation have become commercially available. These commercial DNPs can be treated under Fenton conditions (FeSO(4) and H(2)O(2) at acidic pH) to obtain purer DNP samples with a small average particle size (4 nm) and a large population of surface OH groups (HO-DNPs).…