Materials Literature
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Abstract Adducts of the type Ln(NTA) 3 ·L [Ln = Eu, Gd; NTA = 1‐(2‐naphthoyl)‐3,3,3‐trifluoroacetonate; L = 1,4‐diaza‐1,3‐butadiene RN=CHCH=NR (R = p ‐tolyl, o ‐tolyl)] were prepared by treatment of Ln(NTA) 3 ·2H 2 O with one equivalent of the chelating N−N ligand. The mixed ligand complexes were characterised by elem…
Abstract PVC/Na + –montmorillonite (MMT) nanocomposites were prepared via a simple technique of emulsion polymerization at several different MMT clay concentrations. X‐ray diffraction and transmission electron microscopy studies revealed the formation of a mixture of intercalated and exfoliated nanostructure. Tensile…
Abstract Nanocomposites with unique material properties have been prepared from synthetic plastics and nanosilicates (nanoclay) until now, but not from biopolymers such as starch. The primary challenge in making biopolymeric nanocomposites is to achieve strong adhesion between nanoclay and polymer matrix. For the firs…
Abstract A novel water‐soluble, conducting polypyrrole was synthesized by horseradish peroxidase (HRP), in the presence of sulfonated polystyrene, as a polyanionic template. The HRP is an effective catalyst for the oxidative polymerization of pyrrole in the presence of hydrogen peroxide at room temperature. The reacti…
Gold nanoparticles protected with thiophene-terminated alkanethiols having different alkane chain lengths have been synthesized, and vapor-sensing properties of their spin-coated films have been investigated. Transmission electron microscopy and measurement of the sulfur and gold peak areas of the films by X-ray photo…
The surfactant-encapsulated europium-substituted heteropolyoxotungstates (Eu-POMs), (DODA) 10 H[Eu(H 2 O)(PW 11 O 39 ) 2 ]·17H 2 O (SEC-2, DODA: dimethyl dioctadecylammonium), (DODA) 12 H 3 [Eu(BW 11 O 39 ) 2 ]·13H 2 O (SEC-3), and (DODA) 9 [EuW 10 O 36 ]·9H 2 O (SEC-4), are structurally characterized in detail and th…
With glycine or L-alanine as ligands, a series of novel 3d-4f heterometallic Ln(6)Cu(24) clusters with the formulas of [Sm(6)Cu(24)(mu(3)-OH)(30)(Gly)(12)(Ac)(12)(ClO(4))(H(2)O)(16)].(ClO(4))(9).(OH)(2).(H(2)O)(31) (1) and [Ln(6)Cu(24)(mu(3)-OH)(30)(Ala)(12)(Ac)(6)(ClO(4))(H(2)O)(12)].(ClO(4))(10).(OH)(7).(H(2)O)(34)…
The near-IR absorption spectrum of semiconducting single-walled carbon nanotubes is characterized by the transitions associated with the first (S11) and second (S22) pairs of van Hove singularities in the electronic density of states. We report that a significant effect on the transitions can be caused by non-covalent…
Sn doped ZnO (SZO) nanowires were fabricated by a vapour–liquid–solid growth process. The reaction temperature for the formation of the nanowires can be reduced to ~100°C due to Sn doping. The growth direction and morphology of SZO nanowires depend on the amount of Sn, which is attributed to the difference in sizes be…
Polymer chains are grafted from silica beads (colloidal sol in dimethylacetamide) by atom transfer radical polymerization (ATRP). The method consists of grafting first the initiator molecules on the silica surface (“grafting from” method), in two steps. First, thiol-functionalization of the surface was achieved via si…
Sterically stabilized polystyrene latexes (previously described by Amalvy, J. I.; et al. Chem. Commun. 2003, 1826) were evaluated as pH-responsive particulate emulsifiers for the preparation of both oil-in-water and water-in-oil emulsions. The steric stabilizer was a well-defined AB diblock copolymer where A is poly(2…
The defect-free ${\mathrm{V}}_{2}{\mathrm{O}}_{5}(001)$ surface and ordered structures involving oxygen vacancies have been studied for a wide range of defect concentrations, $\ensuremath{\Theta}$ ($1∕6\ensuremath{\leqslant}\ensuremath{\Theta}\ensuremath{\leqslant}1$ monolayer, $\mathrm{ML}$), combining density functi…
We demonstrate the production of integrated-gate nanocathodes which have a single carbon nanotube or silicon nanowire/whisker per gate aperture. The fabrication is based on a technologically scalable, self-alignment process in which a single lithographic step is used to define the gate, insulator, and emitter. The nan…
A competition between a ferromagnetic metallic phase and a charge/orbital-ordered insulating one has been investigated for manganese oxides with perovskite structure, ${\mathrm{RE}}_{1\ensuremath{-}x}{\mathrm{AE}}_{x}{\mathrm{MnO}}_{3}\phantom{\rule{0.3em}{0ex}}(x=0.45)$ with $\mathrm{RE}$ and $\mathrm{AE}$ being rare…
In this work, we examine the kinetics of titania crystallization in periodic templated mesoporous thin films with a goal of understanding the relationship between atomic-scale crystallization and nanometer-scale structural change. The anatase crystallization proceeds via a surface-nucleation mechanism that rapidly pro…
The structure of a new member of the AxCoO2 x nH2O family (A=Li,Na,K) was determined by high-resolution synchrotron X-ray powder diffraction. Layered lithium cobalt oxide hydrate LixCoO2 x 2H2O crystallizes in a disordered monoclinic structure (space group C2/m) with lattice parameters a = 4.8915(2) A, b = 2.8239(1) A…
Mössbauer spectroscopy and dc magnetization measurements have been used to characterize the low temperature magnetism of a rigorously linear, two-coordinate complex of high-spin Fe(II), Fe[(C(Si(CH3)3]2 (1). The local C-Fe-C chromophore of 1 exhibits novel slow, single-ion paramagnetic relaxation and fully resolved ma…
Uranium manganese germanide, UMn2Ge2, crystallizes in body-centered tetragonal ThCr2Si2 structure with space group I4/mmm, a = 3.993A and c = 10.809A under ambient conditions. Energy dispersive X-ray diffraction was used to study the compression behaviour of UMn2Ge2 in a diamond anvil cell. The sample was studied up t…
On the basis of a first-principles, relativistic electronic structure theory of finite temperature metallic magnetism, we investigate the variation of magnetic anisotropy, K, with magnetisation, M, in metallic ferromagnets. We apply the theory to the high magnetic anisotropy material, L1_0-ordered FePt, and find its u…
We present a self-interaction-corrected (SIC) density-functional-theory (DFT) approach for the description of systems with an unpaired electron or hole such as spin 1/2 defect-centers in solids or radicals. Our functional is easy-to-implement and its minimization does not require additional computational effort with r…