Materials Literature
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The purpose of the present paper was to study at physiological pH the affinity between vasoactive intestinal peptide (VIP) and four poly(amidoamine) dendrimers (PAMAMs) designed for drug delivery. Therefore, a fast and reproducible CE method was first developed to analyze the strongly basic peptide. To allow an accura…
Fluorinated oligomers, when blended into polyurethane, have been shown to migrate to the surface and generate an interface that minimizes protein denaturation and reduces cell activation. This type of surface modification can be achieved with ppm quantities of a bioactive fluorinated surface modifier (BFSM), enabling…
Abstract A novel high‐quality polyphenanthrene (PPH) film with electrical conductivity of 10 −1 S cm −1 was synthesized electrochemically by direct anodic oxidation of phenanthrene in boron trifluoride diethyl etherate containing 10% concentrated sulfuric acid (v/v). The oxidation onset potential of phenanthrene in th…
BACKGROUND: The relation between the structure of discotic molecules and columnar properties, a crucial point for the realization of new advanced materials, is still largely unknown. A paradigmatic case is that hexa-alkyl-thio substituted triphenylenes present mesogenic behavior while the corresponding azatriphenylene…
A simple and effective nonlithographic method to produce a novel organization of noble metal nanoparticles into horseshoe-like nanostructures via self-assembly is described. The adsorption of Au nanoparticles stabilized with the dendrimer 1,2,3,4,5,6-hexakis[(3',5'-bis(benzyloxy)benzyl)sulfanylmethyl]benzene (S(6)G(1)…
Organic/inorganic hybrid multilayer films with noncentrosymmetrically orientated azobenzene chromophores were fabricated by the sequential deposition of ZrO2 layers by a surface sol-gel process and subsequent layer-by-layer (LbL) adsorption of the nonlinear optical (NLO)-active azobenzene-containing polyanion PAC-azoB…
A new application of stress-induced transformation of superelastic shape memory alloys (SMAs) for atraumatic haemostatic forceps has been proposed. In conventional haemostats the pressure on the clamping jaws directly reflects the passive response of biological tissues, exhibiting an exponential increase during graspi…
Core/shell nanocapsules filled with ferrofluids were successfully synthesized at room temperature under ambient pressure. The size and shape of the nanocapsules remained stable after etching and purification processes. Nanocapsules are molecularly redispersable and the internal iron oxide core could be partially or co…
We present an atomic-scale description for the impact of silicon nanospheres onto a silicon substrate under various temperature conditions. In spite of the relatively low impacting kinetic energies considered, of below $1\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$/atom, the process exhibits a rich behavior. The rigid Hert…
To examine the mechanism of the thermal hysteresis between freezing and melting for water confined in a network of the ink-bottle pores of ordered silica, we measured the freezing and melting behavior of pore water in seven kinds of KIT-5 samples with various neck and cavity sizes by means of differential scanning cal…
Abstract Nanocomposites based on an amorphous copolyester, poly(ethylene glycol‐co‐cyclohexane‐1,4‐dimethanol terephthalate) and carbon nanotubes were fabricated using a simple melt processing technique. The reinforcement effect of carbon nanotubes in the copolyester was investigated experimentally using different app…
Flexoelectric phenomenon describes creation of electric polarization in non-conducting solids by applying of gradient of deformation. The inverse flexoelectric phenomenon describes the generation of a mechanical deformation in an insulating solid by an applied gradient of the electric field. Lead magnesium niobate-lea…
The first examples of monodisperse liquid crystalline pentamers, synthesized by covalently linking five mesogenic segments through four flexible spacers, exhibiting mono-/partially bilayered phases with unusual textures, as established by optical, calorimetric, and X-ray diffraction studies, are reported. Importantly,…
Two novel multi-Ni-substituted polyoxometalates K 12 [(SiW 8 O 31 ) 2 Ni 7 (H 2 O) 4 (OH) 6 ]·23H 2 O ( 1 ) and K 6 Na 18 [H 2 {Ni 5 (H 2 O) 5 (OH) 3 ( x -SiW 9 O 34 )(β-SiW 8 O 31 )} 2 ]·39H 2 O ( 2 ) have been successfully synthesized by routine synthetic reactions in aqueous solution. Single-crystal X-ray analysis…
Ferromagnetic ordering in nanocrystallites of dilute magnetic semiconductors arises due to a fascinating interplay of carrier concentration, randomness of magnetic impurity sites, and size-induced quantum confinement. We here report results of a magnetization study on ZnS nanoparticles $(\ensuremath{\sim}2.5\phantom{\…
A room-temperature, open-air method is devised to selectively intercalate relatively low-molecular-weight polymers (approximately 10-100 kDa) from dilute, volatile solutions into open-end, as-grown, wettable carbon nanotubes with 50-100 nm diameters. The method relies on a novel self-sustained diffusion mechanism driv…
The main challenge in developing new wavelength-specific photolabile protecting groups is the rigorous control of the photolysis rate. This rate is controlled by two factors: the chromophore absorbance and the reaction quantum yield. Fine-tuning the properties by changing substituents or structural features is difficu…
Glycol chitosan, a water soluble chitosan derivative being investigated as a new biomaterial, was fractionated via two different methods. Initial characterization of the glycol chitosan with (1)H NMR spectroscopy illustrated the presence of both secondary and tertiary amine groups, contradictory to its widely accepted…
Abstract Porous capsules composed of hematite, silica, and hematite–silica composites are prepared by a templated synthesis method. Polyelectrolyte multilayer‐coated particles (PEMPs) are used to synthesize goethite nanocrystals and the resulting goethite‐nanocrystal‐embedded PEMPs (PEMP–goethite) are then used as tem…
A new first-order procedure for locating transition structures (TS) that employs hybrid quantum mechanical/molecular mechanical (QM/MM) potentials has been developed. This new technique (RPATh+RESD) combines the replica path method (RPATh) and standard reaction coordinate driving (RCD) techniques in an approach that b…