Materials Literature
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Inorganic-organic hybrid semiconductor nanofibers of CdS/CHA (CHA = cyclohexylamine) were successfully synthesized by a simple solvothermal method. The fibers obtained had average diameter of 20 nm and length of several micrometers. In these fibers, periodic layer-like sub-nanometer structures with thickness of approx…
Purpose This paper aims to discuss the development of a software tool UniverFilter™ which is capable of geometrical modelling of 3D woven fabrics, interfacing with computational fluid dynamics tools to numerically determine the fluid (and more specifically liquid) flow path and simulating the filtration process by int…
Abstract It is shown that the dominant conduction mechanism in single‐wall carbon nanotube networks at room temperature is variable range hopping. Thin networks follow a variable range hopping law throughout the temperature range 4 K < T < 300 K, thick networks display variable range hopping characteristics in t…
The gene encoding a novel alcohol dehydrogenase (ADH) that belongs to the short-chain dehydrogenase/reductase (SDR) superfamily was identified in the extremely thermophilic, halotolerant gram-negative eubacterium Thermus thermophilus HB27. The T. thermophilus ADH gene (adh(Tt)) was heterologously overexpressed in Esch…
Perfektes Timing: Bei dem vorgestellten Pro-PARACEST-Agens zum Nachweis von β-Galactosidase-Aktivität spaltet das Enzym den Benzyloxycarbamat-Linker, der das enzymspezifische Substrat enthält, und liefert so [Yb(dota-NH2)]−, das einen PARACEST-Effekt zeigt. Dies ist die erste Verbindung aus einer Familie molekularer B…
Copper films with high density of twin boundaries are known for high mechanical strength with little tradeoff in electrical conductivity. To achieve such a high density, twin lamellae and spacing will be on the nanoscale. In the current study, 10 microm copper films were prepared by pulse electrodeposition with differ…
Sub-threshold leakage in SRAM based cache memories is becoming a predominant source of power consumption in deep-sub micron CMOS designs. Phase Change Random Access Memory (PRAM), a high density, fast access, non-volatile memory is being considered as a candidate for future universal memory technologies. In this paper…
Abstract We present a comparative study of nanostructured materials, based on three experimental analyses allowing determination of crystallite sizes or specific surfaces: each of these analyses, X‐ray diffraction profile analyses (XRD), Raman spectroscopy and Brunauer–Emmett–Teller (BET) gas adsorption technique, sho…
Three active-site cysteine L,D-transpeptidases can individually anchor the Braun lipoprotein to the Escherichia coli peptidoglycan. We show here that two additional enzymes of the same family form peptide bonds between the third residues of peptidoglycan stems, generating meso-DAP(3)-->meso-DAP(3) unusual cross-links.…
Carbides stand out because of their high hardness and wear-resistance. Thus these materials are often discussed for coatings of machine tools etc. Within this work Boron Carbide (B4C) and Carbide (C) thin films were deposited on Si (100) substrates by pulsed-laser deposition technique. In order to improve the wear-res…
Abstract We have synthesized a zwitterion-like molecule 1 having an N,N,N-tridentate ligand site for metal complexation. Compound 1 exhibited negative solvatochromism of the intramolecular charge-transfer (ICT) band in its UV–visible absorption spectrum for different polarity of solvents. Its anion radical (1−•) was g…
The solubilities of lovastatin in binary acetone + water solvent mixtures were determined by the synthetic method from (277.35 to 310.05) K by a laser monitoring observation technique. Results of these measurements were correlated by the semiempirical equation. For the nine mole fractions of acetone studied, a semiemp…
BiSb alloy nanotube−nanowire array has been fabricated by the pulsed electrodeposition technique. It was found that the growth of the polycrystalline nanotubes is terminated by polycrystalline nanowires abruptly and then follows by single crystalline nanowires. The formation mechanism of the nanotubes and the origin o…
In the present paper, flowerlike ZnS−ZnO heterogeneous microstructures built up by ZnS-particle-strewn ZnO microrods were successfully obtained at 120 °C for 10 h via a simple one-pot hydrothermal route without the assistance of any surfactant or template, employing S, Zn(CH 3 COO) 2 ·2H 2 O, NaOH, and NH 3 ·H 2 O as…
A series of the thiophene donor-acceptor [2]rotaxanes have been synthesized based on the inclusion complexes of cyclobis(paraquat- p-phenylene) (CBPQT4+) with thiophene, bithiophene, and terthiophene. The maximum wavelength of the charge-transfer band strongly depends on the number of thiophene units, while the associ…
Sonoluminescence emission, sonochemiluminescence from luminol and the sonochemical yield of hydrogen peroxide were studied under a dual frequency field combining low-frequency (20 kHz) and high-frequency (355 kHz) ultrasound. Under certain conditions it was found that a synergistic enhancement of both sonoluminescence…
Abstract Allyltriethylammonium bromide (ATAB) was covalently attached to the surface of hydrogen‐terminated boron‐doped diamond (BDD) thin films using a photochemical method to fabricate positively charged electrode surfaces. The anodic current for oxalate oxidation both in cyclic voltammetry and in flow‐injection ana…
Microstructured polymer surfaces, including conducting and insulating polymers, have been prepared to achieve electrochemical control of the surface energy and topography. The reported surface switches include pillar- and mesh-like surface patterns of polypyrrole (PPy), poly(3,4-ethylene-dioxythiophene) (PEDOT), and p…
Energy flow: Efficient excitation transfer from porphyrins to nanotubes occurs when the porphyrin molecules, which act as antenna, are flattened (π-stacked, see figure) on the nanotube wall. The photoluminescence of the nanotubes is enhanced when the excitation energy is tuned in resonance with the absorption band of…
Abstract Poly(ethylene glycol)-b-poly(2-(N,N-dimethylamino)ethyl methacrylate) block copolymers possessing a reactive group at the PEG chain end (R-PEG-b-PAMA) was synthesized by two different polymerization techniques. Using R-PEG-b-PAMA block copolymer thus obtained, gold nanoparticles (GNPs) were prepared. The PEG-…