Materials Literature
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The assignment of the vibrational spectra of lithium hydroxide monohydrate, LiOH·H(2)O, has been controversial for more than half-a-century. Here we show that only the combination of all three forms of vibrational spectroscopy: infrared, Raman and inelastic neutron scattering spectroscopies coupled with periodic-densi…
The use of small molecule drugs in cancer chemotherapy has mostly been limited by dose-dependent toxicity and development of drug resistance resulting from repeated administrations. To overcome such problems, efforts have been made to develop drug delivery systems that can bear multiple therapeutic agents in one syste…
In this work, a membrane-dispersion microstructured reactor was specially designed to prepare PB (pseudoboehmite) with a large pore volume and a large pore size through the reaction of CO 2 and an aqueous solution of NaAlO 2 . Tiny crystals of PB and a suitable template are necessary for generating large pore diameter…
Few‐layered sheets of graphene were synthesized on polycrystalline thin Co and Ni films by low pressure chemical vapor deposition. On average, thinner layers of graphene were synthesized on Co than on the conventional Ni at the same process conditions, but slightly higher defects were detected on Co‐grown graphene lay…
Simultaneous and direct x-ray measurements of the smectic layer spacing, molecular tilt, and orientational order in the de Vries smectic $A$ ($\mathrm{Sm}A$) and $C$ ($\mathrm{Sm}C$) phases of two organosiloxane mesogens reveal that (i) the $\mathrm{Sm}C$ (tilt) order parameter exponent $\ensuremath{\beta}=0.26\ifmmod…
Near-infrared surface-enhanced Raman spectroscopy (SERS) is a powerful technique for analyzing the chemical composition within a single living cell at unprecedented resolution. However, current SERS methods employing uncontrollable colloidal metal particles or non-uniformly distributed metal particles on a substrate a…
Hunting high and low: A cyanide-bridged rhombic mixed-spin FeII–FeII complex that features low-spin (LS) and high-spin (HS) FeII centers was prepared by self-assembly including the decomposition of SeCN. The structural motif represents a hybrid [2×2]grid/metallocyclic architecture (see picture).
Abstract Poly(siloxane‐urethane) crosslinked structures were prepared from isophorone diisocyanate, α,ω‐bis(hydroxybutyl)oligodimethylsiloxane and a new hybrid diol containing hydrolysable SiOC2H5 groups besides OH groups. The latest was synthesized by the acid‐catalyzed reaction between 1,3‐bis(3‐glycidoxypropyl)tet…
The immobilization of gold nanoparticles (Au NPs) on silica is made possible by the functionalization of the silica surfaces with organosilanes. Au NPs could only be stabilized and firmly attached to silica-support surfaces that were previously modified with amino groups. Au NPs could not be stabilized on bare silica…
A possible route for the design of 3-D metamaterials in the millimeter and terahertz (THz) frequency range is proposed in this paper. It consists of stacks of spatial filtering screens made of resonant subwavelength metallic elements deposited on polypropylene (PP) film substrates by a contact photolithography techniq…
Abstract We present a series of novel poly(arylene ether sulfone) copolymers containing pendant oligoaniline groups. A novel monomer containing oligoaniline, 2,6‐difluorobenzoyl aniline tetramer (DFAT), was synthesized by reaction of 2,6‐difluorobenzoyl chloride and parent aniline tetramer and incorporated into the af…
Hydrotalcite-like materials containing apart from magnesium and aluminum also copper, cobalt, nickel, and iron were prepared by a co-precipitation method. Thermal transformations of hydrotalcite-like materials were studied by thermal analysis methods as well as XRD, UV–vis–DRS, and XPS measurements of the samples calc…
Scanning tunneling spectroscopic studies of $\mathrm{Ba}({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x}{)}_{2}{\mathrm{As}}_{2}$ ($x=0.06$, 0.12) single crystals reveal direct evidence for predominantly two-gap superconductivity. These gaps decrease with increasing temperature and vanish above the superconducting t…
The first use of 2-pyridylcyanoxime, (py)C(CN)NOH, in transition metal chemistry is described. Depending on the nature of the metal starting material and the reaction conditions employed, the Cu(II)/(py)C(CN)NOH system has provided access to complexes [Cu(3)O{(py)C(CN)NO}(3)(NO(3))(H(2)O)(2)(MeOH)] (1), [Cu(4)O{(py)C(…
Nitrogen doping of a graphite surface by ion bombardment has been found to enhance the durability of deposited Pt clusters for H 2 −D 2 exchange reaction. Scanning tunneling microscopy suggests that this high durability is originated from the stabilized monolayer morphology of the Pt clusters. From the comparison with…
Well controlled gas phase experiments of the size and dopant dependent reactivity of gold clusters can shed light on the surprising discovery that nanometer sized gold particles are catalytically active. Most studies that investigate the reactivity of gold clusters in the gas phase focused on charged, small sized clus…
Patterned "bead in pore" composite film with hemispherical or mushroomlike TiO(2) microparticles lying in the holes of a honeycomblike polystyrene matrix has been fabricated by a template-free bottom-up approach from a homogeneous solution of TiCl(4)/polystyrene/CHCl(3) using the breath figures method. It is a very si…
Since the first studies made by Kerker in the 1970s stating the conditions for null light scattering in certain directions by particles, such conditions have remained unquestioned. The increasing interest in scattering directionality by tuning the optical properties of materials demands a new analysis of this problem.…
Density functional theory has been used to investigate the mechanism of the activation and cleavage of CO 2 by the complexes (NHC)CuEPh 3 (E = Si, Ge, Sn). Our results show that both the Cu−E and E−C(Ph) bonds are capable of activating and cleaving CO 2 . The reactivity of the Cu−E bond toward CO 2 activation decrease…
Self-assembly of nanometer-sized particles is an elegant and economical approach to achieve dense patterns over large areas beyond the resolution and throughput capabilities of electron-beam lithography. In this paper, we present results of self-assembly of oleylamine-capped gold nanoparticles with 8.0 ± 0.3 nm diamet…