Materials Literature
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This article provides an overview of our recent studies on developing functionalized lipid bilayer membranes, on which enzymatic activity was controlled by a molecular switch through connection of molecular recognition. A water-soluble enzyme, such as lactate dehydrogenase, was immobilized noncovalently on the lipid v…
We study the lattice dynamics of an amorphous∕crystalline∕silicon sandwich model using the environment-dependent interatomic potential (EDIP). We establish a base line by computing the vibrational properties of the component bulk crystal and bulk amorphous structures, which show reasonable agreement with experiment an…
Abstract Summary: We utilise pulsed AC plasma polymerisation to create thin films that either contain reactive acid functional groups (by deposition of maleic anhydride (MAH) followed by hydrolysis) or are poly(ethylene glycol) (PEG)‐like in nature (by using diethylene glycol vinyl ether (DEGVE) as monomer). The MAH f…
Abstract Summary: The complex dynamics of poly( n ‐alkyl methacrylates) is studied by advanced 13 C NMR spectroscopy as well as mechanical and dielectric relaxation. Extended backbone conformations are identified as the molecular units involved in structural relaxation. From the variation in the degree of polymerizati…
Abstract This article focuses on why and how the chemical synthesis of cellulose was accomplished. The synthesis of cellulose was an important, challenging problem for half a century in polymer chemistry. For the synthesis, a new method of enzymatic polymerization was developed. A monomer of β‐ D ‐cellobiosyl fluoride…
A fuel processor that reforms natural gas to hydrogen-rich mixture to feed the anode field of fuel cell stack is considered. The first reactor that generates the majority of the hydrogen in the fuel processor is based on catalytic partial oxidation of the methane in the natural gas. We present a model-based control an…
Abstract Summary: Two well‐characterized metallocene isotactic poly(propylene) (iPP) samples, one of high and one of low molecular weight, were blended together for studying the effects of a second component on quiescent and shear‐induced crystallization. A small amount of added high molecular weight (HMW) (up to 10 w…
Experimental results, by x-ray absorption (XAS) at the oxygen $K$-edge and photon-energy dependence of the $\mathrm{O}$ $1s2p2p$ Auger line at the $\mathrm{O}$ $K$ threshold, below Mn ${L}_{2,3}$ as well as well above the Mn ${L}_{2,\mathrm{3}}$ edge of colossal magnetoresistance (CMR) manganites ${\mathrm{Pr}}_{1\ens…
Inkjet printing of the conductive polymer poly(3,4-ethylene dioxythiophene) doped with polystyrene sulfonated acid has been used as the basis for a sensor for organic vapors. The electrical resistance of the film was monitored as it was exposed to atmospheres containing alcohol. Ultrathin films exhibited a sharp and n…
Abstract Summary: Cylindrical brushes with poly( L ‐lysine) and poly( L ‐glutamate) side chains were prepared by “grafting through” and “grafting from” techniques. Grafting from is shown to be more successful for the synthesis of cylindrical brushes with high molar mass main and side chains. AFM height image of polype…
ZnO exhibits organization qualities: Monodisperse and crystalline ZnO nanoparticles stabilized by a combination of long-chain carboxylic acid and amine ligands may be synthesized via a very simple organometallic procedure. The nanoparticles spontaneously organize into 2D or 3D superlattices (see picture).
This short review highlights recent results on the use of nanoclusters of gold protected by a monolayer of functional ligands in both molecular recognition and catalysis. Particular emphasis is given to the multivalent properties of these systems and, in the case of catalysis, to the cooperativity between functional g…
Self-attraction among vertical aligned Au/ZnO nanorods under the illumination of an electron beam has been observed. This phenomenon is attributed to the interaction between the accumulation charges near the metal-semiconductor junctions for two nanorods of different length. A model calculation is presented to explain…
Abstract Summary: In this paper, the gas phase composition of hexamethyldisiloxane (HMDSO) microwave plasma at 4 × 10 −3 mbar and of the corresponding films were studied by FTIR spectroscopy under different power conditions. At low powers, species with a chemical structure very similar to that of HMDSO were observed i…
Numerous supramolecular protein assemblies had been demonstrated to have either physiological or pathological activities. The most significant case of disease-associated self-organized structures is that of amyloid fibrils. The formation of these fibrils is the hallmark of major human disorders, including Alzheimer's…
We report on the fabrication and characterization of field-effect transistors based on single crystals of the organic semiconductor dibenzo-tetrathiafulvalene (DB-TTF). We demonstrate that it is possible to prepare very-good-quality DB-TTF crystals from solution. These devices show high field-effect mobilities typical…
The usual data of commercial ferrite grades are given for sinusoidal waveforms, although the voltage in the typical applications in power electronics resembles to square waves. Firstly, an accurate two wire, oscilloscope power measurement is presented. Special wide frequency current and voltage transducers were design…
We present a set of efficient techniques in first-principles electronic-structure calculations utilizing the real-space finite-difference method. These techniques greatly reduce the overhead for performing integrals that involve norm-conserving pseudopotentials, solving Poisson equations, and treating models which hav…
We have measured soft x-ray photoemission and O 1{\it s} x-ray absorption spectra of Ca$_{1-x}$Sr$_x$RuO$_3$ thin films prepared {\it in situ}. The coherent and incoherent parts have been identified in the bulk component of the photoemission spectra, and spectral weight transfer from the coherent to the incoherent par…
Lattice deformations of InAs self-assembled quantum dots, which were grown on (001) GaAs substrates and embedded in GaNAs strain compensating layers (SCLs), were examined with an ion-channeling method in Rutherford backscattering spectrometry. The channeling experiments demonstrated that the increase of the nitrogen c…