Materials Literature
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Alumina membranes filled with mesoporous silica, either nanowires or nanotubes, have been prepared. The orientation of the mesopores relative to the alumina host can be controlled by varying the aging environment.
Using computer simulations, we investigate the benefits of coating substrates that contain nanoscale defects with nanoparticle-filled polymer films. In particular, we focus on surfaces that contain a nanoscopic notch and use molecular dynamics (MD) simulations to determine the particle and polymer distribution on the…
In this paper we review a new method to move nano-objects on a polymer surface that is made from diblock-copolymer and mixed brushes. Such brush systems consist of polymer chains covalently attached to a surface with high grafting density. If the two polymeric components the brush consists of are incompatible with eac…
The effect of the chemical composition on the structure of Cr‐Al‐C was studied by combinatorial thin film synthesis. By changing the Cr/C ratio from 1.72 to 3.48 and the Cr/Al ratio from 1.42 to 4.18 the formation of Cr 2 AlC, Cr 2 Al and Cr 23 C 6 phases was observed. Furthermore, based on X‐ray diffraction a single…
The X-ray structure of native cellobiohydrolase IB (CBH IB) from the filamentous fungus Talaromyces emersonii, PDB 1Q9H, was solved to 2.4 A by molecular replacement. 1Q9H is a glycoprotein that consists of a large, single domain with dimensions of approximately 60 A x 40 A x 50 A and an overall beta-sandwich structur…
Sustainable biotechnological production of polyhydroxyalkanoates from renewable resources is an alternative to chemical polyster production from mineral oils. The polymers produced are biodegradable, and due to their characteristics can be used for the production of packaging materials. Many different prokaryotic micr…
In this review, the different types of liposome used in medicine, in particular in the field of antitumor therapy, are focalised, emphasizing their structures, pharmacological action, pharmacokinetics and biodistribution, toxicity profiles and in the main clinical applications. The first-generation liposomes (conventi…
Abstract Several amide groups‐containing plasticizers for thermoplastic starch (TPS), such as formamide, acetamide, and urea, were studied in this paper with glycerol as reference. The hydrogen bond interaction between starch and plasticizers in TPS was tested by Fourier transform infrared (FT‐IR) spectroscopy. Both t…
A microscopic model of indirect exchange interaction between transition metal impurities in dilute magnetic semiconductors (DMS) is proposed. The hybridization of the impurity $d$-electrons with the heavy hole band states is mainly responsible for the exchange of electrons between the impurities, whereas the Hund rule…
The thermal conductivity κ(T) of single crystals of silicon with two different isotopic compositions: natural and 99.983% enriched 28Si, was investigated in the temperature range from 0.5 K to 300 K. The enriched 28Si sample has very high thermal conductivity maximum of 290 W cm–1K–1 at Tmax = 26.5 K, about 7.5 times…
Nitrogen-doped p-type ZnO (ZnO:N) films have been achieved by ultrasonic spray pyrolysis at atmosphere. The high structural quality of the obtained films was confirmed by x-ray diffraction, scanning electron microscopy, and photoluminescence spectra. Hall-effect and Seebeck-effect measurements indicate that the obtain…
Calcite crystals grown by organisms can be elaborate and enigmatic. One of the best examples is the tiny calcite shields known as coccoliths that are produced by unicellular algae. Coccoliths consist of interlocking single crystals of highly modified morphology, and complex organic molecules called CAPs (coccolith ass…
A recently proposed system with a central planar tetracoordinate carbon linking two three-membered rings, C(5)(2-), lends itself to extension in one, two, and three dimensions. Our construction of potential realizations begins with an analysis of the electronic structure of C(5)(2-). Dimers such as C(10)Li(3-), C(10)L…
Spontaneous formation of ZnO dendritic nanowires has been achieved on the faceted surfaces of polyhedral Zn microcrystals by oxidizing the latter at 600°C. Electron microscopy investigations reveal that all the dendritic branches are elongated in ⟨11–20⟩ directions within the ±(0001) primary planes, forming two-dimens…
We theoretically examine superconductivity in quasi-two-dimensional organic conductor, α-(ET) 2 I 3 salt, which has been found under uniaxial pressure and at temperature below the charge ordering. The interplay of many bands and several repulsive interactions gives rise to novel role of the charge ordering (CO), which…
In this work, we characterized streptavidin-conjugated quantum dots (QDs) manufactured by Quantum Dot Corporation. We present data on: (1) two-photon excitation; (2) fluorescence lifetimes; (3) ensemble and single QD emission anisotropy; (4) QDs as donors for Forster resonance energy transfer (FRET); and (5) spectral…
Recent studies on the optical properties, in particular, luminescence, of a variety of doped semiconductor nanoparticles are reviewed. The effects of quantum confinement, temperature and pressure on luminescent properties are discussed. In addition, electroluminescence, cathodoluminescence, magnetoluminescence and rel…
Functionalised carbon nanotubes (f-CNTs) are emerging as new tools in the field of nanobiotechnology and nanomedicine. This is because they can be easily manipulated and modified by encapsulation with biopolymers or by covalent linking of solubilising groups to the external walls and tips. The possibility of incorpora…
Abstract The spin crossover phenomenon in molecular inorganic compounds is one of the most spectacular examples of bistability phenomena leading to a switching between the high‐spin and the low‐spin states of the molecule by several means such as temperature, pressure, light and magnetic field (multi‐property molecula…
The variation of tensile strength of unsaturated polyester based sisal–glass hybrid composites with fiber loading has been studied. The tensile strength of these hybrid composites has been found to be higher than that of the matrix. The effects of NaOH treatment and trimethoxy silane (coupling agent) treatment on the…