Materials Literature
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The riboflavin (R) and melamine (M) supramolecular complex in the mole ratio of 3:1 (RM31) produces a thermoreversible gel in aqueous medium. The gelation mechanism has been elucidated from morphological investigations using optical, electron, and atomic force microscopy together with time-dependent circular dichroism…
Ba y Co 4 Sb 12 -based composites with dispersed fullerene or barium fulleride have been synthesized by the solid state reaction and spark plasma sintering technique. When fullerene was used as a dispersed phase, a part of barium in the filled skutterudite reacted with fullerene to form barium fullerides. Most of the…
The structural and optical properties of erbium-doped silicon-rich silica samples containing $12\phantom{\rule{0.3em}{0ex}}\mathrm{at.}\phantom{\rule{0.2em}{0ex}}%$ of excess silicon and $0.63\phantom{\rule{0.3em}{0ex}}\mathrm{at.}\phantom{\rule{0.2em}{0ex}}%$ of erbium are studied as a function of annealing temperatu…
Abstract Polyaniline nanodisks have been synthesized successfully by the chemical oxidation polymerization of aniline by a self‐assembly process without the use of any acid. The thickness and lateral dimensions of the polyaniline nanodisks are in the range of 20–30 nm and 1–2 µm, respectively. The influence of synthet…
Controlled surface graft polymerizations allowed a wide range of functionalities, from antibacterial effects to cell adhesion properties, to be imparted on titanium surfaces. A trichlorosilane coupling agent, containing an atom-transfer radical polymerization (ATRP) initiator, was first immobilized on the oxidized tit…
Abstract A novel organomodified montmorillonite prepared by solid‐state method and its nanocomposites with natural rubber were studied. The nanocomposites were prepared by traditional rubber mixing and vulcanizing process. The properties of solid‐state organomodified montmorillonite were investigated by Fourier‐transf…
We report the synthesis and chemical, structural, and transport properties characterization of Ba8Ga16SixGe30−x type I clathrates with similar Ga-to-group IV element ratios but with increasing Si substitution (4<x<14). Substitution of 20 at. % Si within the Ga-Ge lattice framework of the type I clathrate…
The adsorption of adenine, thymine, and their radicals on the surfaces of metallic and semiconducting single-wall carbon nanotubes are studied by local density approximation within density functional theory. The energies and equilibrium distances for several configurations are obtained after relaxation of the entire s…
Peroxide-cross-linked ethylene−propylene−(diene) rubbers, EP(D)M, have complex network structures with various types of chemical cross-links as well as both temporary and trapped chain entanglements. To obtain a detailed picture of the respective contributions of these different types of cross-links and entanglements…
The magnetization of single-molecule magnets (SMMs) in non-crystalline materials is probed using high-sensitivity magneto-optical techniques. The environment strongly influences the magnetic properties and dramatically changes the spin dynamics. Comparison between different materials indicates the phonon bath as a pos…
Perovskite-type rare-earth manganites $R\mathrm{Mn}{\mathrm{O}}_{3}$ ($R=\mathrm{Tb}$ and Dy) undergo the ferroelectric transitions concomitantly with the collinear to noncollinear magnetic transitions of Mn $3d$ spins, in which the electric polarization direction can be controlled by an external magnetic field. To cl…
We use time-resolved x-ray photon correlation spectroscopy to investigate the slow dynamics of colloidal gels made of moderately attractive carbon black particles. We show that the slow dynamics is temporally heterogeneous and quantify its fluctuations by measuring the variance chi of the instantaneous intensity corre…
A novel assembly technique is used to construct organized single-walled carbon nanotube (SWNT) networks. The assembly mechanisms are studied and the electrical and structural characterization of the fabricated micro- and nanoscale SWNT structures (see image) are performed. This approach is simple, scalable, and compat…
Through the tight-binding calculation, we demonstrate that magnetic and quantum confinements have a great influence on the low-energy band structures of one-dimensional (1D) armchair graphene ribbons. The magnetic field first changes 1D parabolic bands into the Hall-edge states which originate in the Landau wavefuncti…
The blending of carbon nanotubes (CNTs) into polymer matrices leads to intrinsically nonequilibrium materials whose properties can depend strongly on flow history. We have constructed a rheodielectric spectrometer that allows for the simultaneous in situ measurement of both the electrical conductivity $\ensuremath{\si…
We fabricated ${\mathrm{Fe}}_{3\ensuremath{-}x}{M}_{x}{\mathrm{O}}_{4}$ $(M=\mathrm{Mn},\mathrm{Zn})$ thin film by pulsed laser deposition technique and investigated their electronic structure by hard x-ray photoemission spectroscopy (HX-PES) and x-ray magnetic circular dichroism (XMCD). HX-PES and XMCD revealed that…
We have investigated the ultrafast spin and charge dynamics in the course of a photoinduced phase transition from an insulator with short-range charge order and orbital order (OO) to a ferromagnetic metal in perovskite-type Gd0.55Sr0.45MnO3. Transient reflectivity changes suggest that the metallic state is formed just…
The synthesis and liquid crystalline behavior of peptide nanowire is presented. An aromatic dipeptide rapidly assembles into robust one-dimensional nanowires having a large aspect ratio in a volatile organic solvent. The stable dispersion of rigid nanowires shows a colloidal nematic liquid crystalline phase over a bro…
By introducing different long rigid ligands into polyoxometalate (POM) systems, four novel inorganic–organic hybrids containing multitrack Cu−N coordination polymeric chain-modified POMs, {[Cu(4,4′-bipy)] 3 [HGeMo 12 O 40 ]}·0.5H 2 O ( 1 ), [Cu(4,4′-bipy)]{[Cu(4,4′-bipy)] 2 [W 6 O 19 ]}·4H 2 O ( 2 ) (bipy = bipyridine…
We studied the influence of silver nanoparticles (NPs) in the luminescence properties of TeO2–PbO–GeO2 glass doped with trivalent praseodymium (Pr3+) ions. The experiments were performed with samples containing different concentrations of NPs controlled by heat treatment of the glass. The enhancement of the Stokes lum…