Materials Literature
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Tin sulfide (SnS) nanostructures have been synthesized using a simple and low temperature chemical solution method on seeded substrates, and their structural and optical properties have been investigated. The as-grown SnS nanostructures with well-defined facets exhibited good stoichiometry between constituent elements…
Presented here are studies of the impact of excitation angle on surface enhanced Raman and luminescence spectroscopy of dye immobilized on a plasmon active nanocavity array support. Results show that both Raman and luminescence intensities depend on the angle of incidence consistent with the presence of cavity support…
Protein-resistant polyurethane (PU) surfaces were prepared by sequentially grafting poly(2-hydroxyethyl methacrylate) (poly(HEMA)) and poly(oligo(ethylene glycol) methacrylate) (poly(OEGMA)) via surface-initiated atom transfer radical polymerization (s-ATRP). The chain lengths of poly(HEMA) and poly(OEGMA) were regula…
Perfect vertically aligned and periodically arranged arrays of multidielectric heterostructures are ideal platforms both for photonic crystals and photonic bandgap materials. Carbon nanotubes grown inside anodic alumina templates form a novel class of heterostructured materials ideally suited for building such platfor…
The synthesis and full characterization of a redox-active π-donating molecular square is described, through coordination-driven self-assembly of a new key bis(pyrrolo)TTF building block with Pt(II) salts; the electrochemical behaviour of the square is consistent with noninteracting bis(pyrrolo)TTF units.
Strain-driven phase transitions and related intrinsic polarization, dielectric, and piezoelectric properties for single-domain films were studied for BiFeO3 using phenomenological Landau–Devonshire theory. A stable and mixed structure between tetragonal and rhombohedral-like (monoclinic) phases is predicted at a compr…
A crystal-growth technique for single crystals of $R\text{FeAsO}$ ($R=\text{La}$, Ce, Pr, Nd, Sm, Gd, and Tb) using NaI/KI as flux is presented. Crystals with a size up to $300\text{ }\ensuremath{\mu}\text{m}$ were isolated for single-crystal x-ray diffraction measurements. Lattice parameters were determined by LeBail…
In this work, we reported original synthesis of ZnTe nanoparticles in aqueous solution. The solution pH is believed to be a major factor governing the synthesis of thioglycolic acid (TGA)-capped ZnTe nanoparticles. In the pH range of 5.9−7.1 and the pH range over 10.0, TGA-capped ZnTe nanoparticles can be successfully…
Nano-alloy: Crystalline polyaminoborane is formed upon releasing 1.0 equivalent H2 from ammonia borane at 60 °C catalyzed by a nano-FeB alloy. Our experimental results show that about 1.0 and 1.5 equiv H2 can be released at 60 and 100 °C, respectively.
A general synthetic strategy for controlling the shape of gold domains grown onto CdS semiconductor nanocrystals is presented. The colloidal growth of Au nanoparticles is based on the temperature-controlled reduction of Au-oleate complexes on the surface of CdS and allows for precise tuning of nanoparticle diameters f…
We present thermoelectric properties and electronic structure of the series compounds of In4Se3−xTex (0.0≤x≤3.0). Even if the Te-doping is an isoelectronic substitution, we found that the electron dominated carrier transport in Se-rich region (x≤0.2) evolves into the electron-hole bipolar transport properties in Te-ri…
First and second-order Raman analysis on annealed silicon nitride films is reported. Possible formation of amorphous Si nanoparticles after an intermediate treatment is deduced from the occurrence of a resonant spectrum. After nucleation of Si nanocrystals, with a model description of the first-order spectra it is pos…
We report electrical conductivity (σ), dielectric constant (ε) and the elastic constant measurements in a nematic liquid crystal (LC) doped with small concentrations of gold nanorods. This LC-nanoparticle complex, shows not only orders of magnitude higher σ, but also stabilizes its anisotropy. The ε data suggests an i…
This paper gives an overview about enzyme catalysis, and reports the precision synthesis of multifunctional poly(ethylene glycol)s using this green chemistry approach. Specifically, vinyl acrylate was transesterified with tetraethylene glycol (TEG) and a PEG with DPn = 23, and then (HO)2–TEG–(OH)2 and (HO)2–PEG–(OH)2…
Understanding the control of polymorphism in organic crystals is of paramount importance to the pharmaceutical, chemical, and food industries. In this work, we investigated two mechanisms described in the literature about the selective crystallization of α- and β-glycine from water and from mixtures of water and metha…
INTRODUCTION: Particulate matter (PM), specifically nickel (Ni) found on or in PM, has been associated with an increased risk of mortality in human population studies and significant increases in vascular inflammation, generation of reactive oxygen species, altered vasomotor tone, and potentiated atherosclerosis in mu…
Porphyrins may be confused, but Linus Pauling and Melvin Calvin were not! Calvin proposed “carboporphyrins” in 1943 and, unbeknownst to contemporary science, Pauling contemplated the existence and stability of such fundamental porphyrin isomers in 1944. What he called “isoporphyrins” with “extroverted pyrrole rings”,…
The dipole moment (μ), linear polarizability (α), and first hyperpolarizability (β(tot)) of the asymmetric unit of L-arginine phosphate (LAP) monohydrate crystal are investigated using the supermolecule approach in combination with an iterative electrostatic polarization scheme. Environment polarization effects are at…
At pH 7, amorphous silica has a characteristic negative charge due to the deprotonation of silanol groups on the surface. Electrokinetic phenomena and transport of biomolecules in devices depend sensitively on the surface morphology, distribution of ions and solvent, and adsorption properties of solutes close to the s…
Deactivating effects produced by CO 2 on a catalyst combining oxidized copper and cerium prepared by microemulsion−coprecipitation and employed for preferential oxidation of CO in a H 2 -rich stream have been examined by means of operando-DRIFTS and -XANES (Cu K and Ce L 3 edges) spectroscopies. The results reveal tha…