Materials Literature
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The template‐directed synthesis of helical ribbons and cylindrical micropipes (see Figure) of organically functionalized magnesium phyllosilicate clay is achieved by high fidelity decoration of self‐assembled phospholipid tubules. The replicas are produced by electrostatic interactions between the positively charged o…
An insoluble disclike building block hexa(4-iodophenyl)-peri-hexabenzocoronene (see picture) was synthesized in an efficient way, and subsequent functionalization led to a series of soluble, star-type hexabenzocoronenes (HBCs), all showing remarkable self-assembly behavior: 1) highly ordered liquid-crystalline materia…
We report on a Sievert-type experimental apparatus for the study of hydrogen storage in metals forming the hydride phase. The apparatus is realized by only using commercial components and allows the study of the hydrogen absorption and desorption kinetics as well as the determination of the pressure–composition ( P–C…
Inducing chirality: The supramolecular interaction of achiral bis(zinc porphyrin) with enantiopure amino acid derivatives in different solvents results in chirality induction. The sign and degree of the circular dichroims is controlled by the solvent polarity (see picture).
Abstract meso ‐Tetrakis{4‐[2‐(trimethylsilyl)ethynyl]phenyl}porphyrin [TPP(4‐CCTMS)_H2] and its complexes with Zn II , Ni II , Ga III , In III , and Sn IV were synthesized and characterized. Their nonlinear optical transmission characteristics were determined using a 532 nm, 5 ns pulsed laser at a repetition rate of 2…
Biocompatibility and the Biomaterial-Tissue Interface. Tissue Engineering Equivalents. Delivery Systems. Emerging Concepts in Biomaterials. Index.
Hollow Ni spheres with average diameter of ∼370 nm have been prepared via redox reaction of NiSO 4 with NaH 2 PO 2 in a cyclohexane–water–polyglycol emulsion system. It is found that the composition of the reaction system has a significant influence on the formation of hollow Ni spheres. A mechanism of formation of th…
Abstract We report photovoltaic devices consisting of patterned TiO 2 , porphyrin dyes, and layer‐by‐layer (LBL) polyelectrolyte multilayer/oligoethylene glycol dicarboxylic acid (OEGDA) composite films. A composite polyelectrolyte LBL/OEGDA film was fabricated by formation of an alternating multilayer of linear polye…
We present a theorical investigation of the optical transmission of a dielectric grating carved in a tungsten layer. For appropriate wavelengths tungsten shows indeed a dielectric behaviour. Our numerical simulations leads to theoretical results similar to those found with metallic systems studied in earlier works. Th…
We use dynamical mean field theory to find an exact solution for inelastic light scattering in strongly correlated materials such as those near a quantum-critical metal-insulator transition. We evaluate the results for $\textbf{q}=0$ (Raman) scattering and find that resonant effects can be quite large, and yield a tri…
We present a Monte Carlo approach to incorporating the effect of thermal fluctuations in field theories of polymeric fluids. This method is applied to a field-theoretic model of a ternary blend of AB diblock copolymers with A and B homopolymers. We find a shift in the line of order−disorder transitions from their mean…
Our recent theory (Ref. 1) enables us to choose arbitrary quantities as the basic variables of the density functional theory. In this paper we apply it to several cases. In the case where the occupation matrix of localized orbitals is chosen as a basic variable, we can obtain the single-particle equation which is equi…
The combined effect of electron-electron interactions and spin-orbit scattering in metal nanoparticles can be studied by measuring splitting of electron levels in magnetic field ($g$ factors) in tunneling spectroscopy experiments. Using random matrix theory to describe the single-electron states in the metal particle,…
By applying variational method, the strong electron-surface optical(SO) phonon interaction and the weak electron-longitudinal optical (LO) phonon interaction are studied systematically in present paper. The formula of induced energy $V_{e-so}$, $V_{e-lo}$ in both the ground and excited states are given. The numerical…
Abstract The preparation of hexagonally ordered metallic nanodots was studied in detail with emphasis on the chemical state of the resulting particles. To obtain these dots, in a first step micellar structures were formed from diblock copolymers in solution. The reverse micelles themselves are capable of ligating defi…
Nanomaterials made easy! The facile oxidation of [Zn(c-C6H11)2] at room temperature in an organic solvent containing long-chain amine ligands leads to the formation of size- and shape-controlled crystalline ZnO nanoparticles (see picture). These particles, in the form of nanodisks and nanorods of low size dispersity i…
Well‐aligned nanowire arrays of Mo and its oxides have been synthesized. MoO 2 nanowire arrays are first synthesized by thermal evaporation in a vacuum chamber. With further treatments in the growth chamber, the above nanowire arrays can be turned into MoO 3 nanowire arrays or metallic Mo nanowire arrays (see Figure).…
Abstract Solar energy materials have properties tailored to meet requirements set by the spectral distribution, angle of incidence, and intensity of the electromagnetic radiation prevailing in our natural surroundings. Specifically, the optimization can be performed with regard to solar irradiation, thermal emission,…
Large area (mm 2 in size) infrared electroluminescent devices are demonstrated using colloidally grown PbSe quantum dots (QDs) in organic host materials. By changing the QD size the electroluminescence is tuned from λ = 1.33–1.56 μm. The fabrication of this light‐emitting device (see Figure) combines the thin film pro…
Abstract Colloidal aggregates with well‐controlled sizes, shapes, and structures have been fabricated by dewetting aqueous dispersions of monodispersed spherical colloids across surfaces patterned with two‐dimensional arrays of relief structures (or templates). The capability and feasibility of this approach have been…