Materials Literature
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A theoretical model describing the plasma-assisted growth of carbon nanofibres (CNFs) that accounts for the nanostructure heating by ion and etching gas fluxes from the plasma is developed. Using the model, it is shown that fluxes from the plasma environment can substantially increase the temperature of the catalyst n…
The mussel byssus is a unique holdfast structure employed by marine mussels to colonize diverse substrates. The byssus consists of extracellular threads with mainly proteinaceous components. Individual threads reveal high tensile strength at their distal end and high elasticity in their proximal portion. Our studies s…
Iron oxide nanocrystals that are dextran coated are widely exploited biomedically for magnetic resonance imaging (MRI), hyperthermia cancer treatment and drug or gene delivery. In this study, the use of an alternative coating consisting of a phospholipid bilayer directly attached to the magnetite core is described. Th…
Two new potential single molecule magnets [Mn(10)O(3)(O(2)CCH(3))(6)(tea)(teaH)(3)(teaH(2))(3)][NO(3)](2).3H(2)O (1) and [Mn(18)(N(3))(12)O(12)(tea)(2)(teaH)(4)(OMe)(MeOH)].2MeOH.H(2)O.Et(2)O (2) have been synthesised using manganese(II) nitrate, the tripodal ligand triethanolamine (teaH(3)) and co-ligands such as ace…
Abstract A chemically specific and facile method for the biofunctionalization of WS 2 nanotubes (NT‐WS 2 ) is reported. The covalent modification strategy is based on the affinity of the nitrilotriacetic acid (NTA) side chain, which serves as a ligand for the surface binding to NT‐WS 2 and simultaneously as an anchor…
Herein we report the fabrication and study of hierarchically structured fibers of a dendronized polymer that were simply prepared by drawing out from their columnar phase in melt. At first, the combined SEM and SAXS results indicate that the fibers contain fibrils that align along the axial direction and have a diamet…
An aliphatic polyester with free pendant mercapto groups was prepared by direct lipase-catalyzed polycondensation of hexane-1,6-diol and dimethyl 2-mercaptosuccinate. The polycondensation reaction using immobilized lipase from Candida antarctica (lipase CA) was carried out in bulk at 70 degrees C without any formation…
The synthesis and characterization of novel fluorinated Er 3+ complexes emitting at the telecommunications wavelengths are presented. These new knowledge-based materials have been designed and optimized on the basis of an extensive photophysical investigation on the processes controlling the overall quantum yield, nam…
Abstract A phosphor based on Sr 0.97 Al 2 O 4 :Eu 0.03 with a biomorphous morphology is manufactured via vacuum assisted infiltration of wood tissue ( Pinus sylvestris ) with a precursor nitrate solution. The nitrate solution penetrates homogeneously into the uniform arrangement of rectangular shaped tracheidal cells…
A simple method of synthesizing red phosphor is demonstrated. This method uses wet chemical etching of crushed quartz schist (QS) in a solution. The synthesized phosphor has particle sizes of less than with porouslike morphology. The photoluminescence and photoluminescence excitation spectroscopy show no clear differe…
Application of an electric field to liquid crystalline film forming imines with negative dielectric anisotropy, such as N-(4-methoxybenzylidene)-4-butylaniline (MBBA, 1), results in the expulsion of compounds that do not participate in the formation of the liquid crystalline phase. Furthermore, amines and aromatic ald…
Highly ordered mesoporous silver, which exhibits well-defined mesopores, high surface area and pore volume, has been successfully obtained using a cubic mesoporous silica, KIT-6, with controlled surface hydrophobicity as the hard template.
Abstract Application of cuprous oxide (Cu 2 O) thin films for methane gas sensors was investigated. The Cu 2 O films were prepared by the thermal oxidation of Cu films under reduced partial pressure of oxygen. The XRD and AFM measurements were performed to investigate crystal structure and the surface properties of sy…
The effective atomic numbers Z(eff) of some fatty acids and amino acids have been calculated by two numerical methods, a direct method and an interpolation method, in the energy range of 1 keV-20 MeV. The notion of Z(eff) is given a new meaning by using a modern database of photon interaction cross sections (WinXCom).…
The CO oxidation reaction on Rh(111) was studied both at low pressures (≤2 × 10 −4 Torr) under steady-state conditions and at high pressures (0.01−88 Torr) in a batch reactor at various gaseous reactant compositions. Surface CO and O coverages were determined using polarization modulation infrared reflection absorptio…
On a roll: Attachment of flexible coils to the middle of a rigid rod generates T-shaped rod-coil molecules that self-assemble into layers that roll up to form filled cylindrical and hollow tubular scrolls, depending on the coil length, in the solid state (see picture); the rods are arranged parallel to the layer plane.
The microstructure and deformation mechanics of carbon-nantotube networks are measured, and demonstrate a crossover from strain-induced deformation, dominated by aggregates of short rigid nanorods, to deformation dominated by individual long semi-flexible nanotubes. Our results suggest that short nanotubes provide the…
Direct visualization of photoinduced tunneling charge transfer (TCT) in an Au(5)/para-aminothiophenol (PATP)/Ag(6) junction in which Au and Ag clusters form the first and second layer, respectively, is provided by the charge difference density (see picture; green and red stand for holes and electrons, respectively). W…
We report the investigation of titania (Degussa P25) supported gold catalysts prepared by magnetron sputtering. Catalysts grown on natural fumed titania were structurally unstable, resulting in the rapid coarsening of 2.4 nm gold clusters into large ∼20 nm gold clusters in a few days at room temperature under normal a…
Abstract A series of rigid π‐conjugated mono‐, bis‐, tris‐, and tetrakis(terpyridine)s 3 – 8 was synthesized in high yields by means of Horner–Wadsworth–Emmons (HWE) reactions between benzyl phosphonates 1 and an aldehyde‐functionalized terpyridine derivative 2 . The photophysical properties of the materials in soluti…