Materials Literature
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Enzymes from psychrophiles show higher catalytic efficiency in the 0-20 degrees C temperature range and often lower thermostability in comparison with meso/thermophilic homologs. Physical and chemical characterization of these enzymes is currently underway in order to understand the molecular basis of cold adaptation.…
The use of drugs with intracellular targets will strongly depend on the availability of delivery systems that are able to deliver them to specific intracellular sites at an optimal rate. Biodegradable dextran nanogels were prepared using liposomes as a nanoscaled reactor.1,2 These nanogels were obtained by UV polymeri…
A unified physically based microstructural representation of f.c.c. crystalline materials has been developed and implemented to investigate the microstructural behaviour of f.c.c. crystalline aggregates under inelastic deformations. The proposed framework is based on coupling a multiple-slip crystal plasticity formula…
X-ray diffraction techniques have been applied to characterize the Au-catalysed growth of aligned ZnO nanowire arrays on an AlGaN/AlN/Al 2 O 3 substrate. The orientation relationships between the AlN layer, AlGaN layer, ZnO nanowires and Au particles were determined using x-ray texture analysis. Two orientations of th…
We show how to change optically the distance between two protein-linked gold nanoparticles by Raman-induced motion of the linker protein. Rayleigh scattering spectroscopy of the coupled-particle plasmon allows us to compare the inter-nanoparticle distance of individual protein-linked gold nanoparticle dimers before an…
We study static and dynamic properties of polymer brushes of moderate and high grafting densities using molecular dynamics simulations. The self-consistent-field theory is able to reproduce the observed density profiles once finite extensibility of the chains is included. A similar approach, using a Langevin-type mode…
High-quality ultrawide Se and Te nanobelts have been prepared through thermal evaporation and deposition of Se and Te bulk powder in a vacuum system. The products were characterized by powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron micros…
The 3D domain structure in ferroelectric Bi4Ti3O12 crystals is investigated by using piezoresponse force microscopy. Energetically favorable 90° domain walls with faceted structure are established on the surface along the a–b plane, while the 90° domain walls have complicated and curved surfaces along the c-axis insid…
Abstract We present a method for the electrospinning of conducting polymeric composite nanofibers using a poly(dimethyl siloxane) (PDMS)‐based microfluidic device. To scale‐up the process and spin multicomponent systems, we designed a unique multi‐spinnerette electrospinning device using microchannels cast in PDMS. Na…
Colloidal HfO2 nanorods with controllable defects are synthesized. An increased defect concentration is observed by high-resolution electron microscopy and by optical absorption spectroscopy. Nanocrystals with a high defect concentration exhibit ferromagnetism and superparamagnetic-like behavior (see figure). This low…
Dilute concentrations of cellulose nanocrystal solutions were spin coated onto different substrates to investigate the effect of the substrate on the nanocrystal submonolayers. Three substrates were probed: silica, titania, and amorphous cellulose. According to atomic force microscopy (AFM) images, anionic cellulose n…
We report control of magnetic anisotropy in epitaxial (Ga,Mn)As by anisotropic strain relaxation in patterned structures. The strain in the structures is characterized using reciprocal space mapping by x-ray techniques. The magnetic anisotropy before patterning of the layer, which shows biaxial easy axes along [100] a…
Poly(3-butylthiophene) (P3BT)/insulating-polymer composites with high electrical conductivity have been prepared directly from the solution. These composites exhibit much higher conductivity compared to pure P3BT with the same preparation method provided that P3BT content is higher than 10 wt %. Morphological studies…
The aim of the present study was to design amphiphilic oligopeptides that can self-assemble into vesicular structures. The ratio of hydrophilic to hydrophobic block length was varied, and peptides were designed to have a hydrophobic tail in which the bulkiness of the amino acid side groups increases toward the hydroph…
Polymetallic, highly organized molecular architectures can be created by "bottom-up" self-assembly methods using ligands with appropriately programmed coordination information. Ligands based on 2,6-picolyldihydrazone (tritopic and pentatopic) and 3,6-pyridazinedihydrazone (tetratopic) cores, with tridentate coordinati…
Abstract The effects of periodate oxidation on cellulose were studied by means of gel permeation chromatography (GPC) using multiple detection and carbonyl-selective fluorescence labeling according to the CCOA methodology profiling of carbonyl groups. At low degrees of oxidation, the molecular weight distribution was…
A series of β-NiS three-dimensional (3D) flowerlike architectures with an average diameter of 2−4 μm have been hydrothermally synthesized in the presence of ammonia and trisodium citrate. Morphology modification can be conveniently realized by varying the reaction temperature. At 120 °C the flowerlike architectures we…
A new approach for fabricating a layer-by-layer polymer film was explored, which was based on the halogen bonding between poly(4-(4-iodo-2,3,5,6-tetrafluorophenoxy)-butyl acrylate) and poly(4-vinylpyridine). Layer-by-layer assembly of two polymers was confirmed by UV-vis spectroscopy and quartz crystal microbalance me…
Proteins are the fundamental building blocks of a vast array of biological materials involved in critical functions of life, many of which are based on highly characteristic nanostructured arrangements of protein components that include collagen, alpha helices, or beta sheets. Bone, providing structure to our body, or…
Hydrogen-bond interaction in donor-acceptor charge-transfer complexes of TTF-imidazole demonstrated the electronic effects in terms of control of component ratio and redox activation. These unprecedented effects of hydrogen bonds renewed the criteria giving "a high probability of being organic metals" and produced a n…