Materials Literature
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This paper gives an overview of our recent work on freely suspended layer-by-layer nanomembranes containing organized arrays of nanostructures such as carbon nanotubes or gold nanoparticles. These unique organized arrays toughen the membrane and add interesting optical properties which are useful in sensor application…
Different MCM-41 samples containing framework iron were prepared and tested in CO oxidation showing unprecedented high activities after reduction in hydrogen above 773 K.
The ultrastructure of cationic dendronized polymers (denpols) of third and fourth generations (PG3 and PG4) in water was determined by using single-particle cryo-transmission electron microscopy (cryo-TEM). At concentrations in the region of 50 mg L(-1), networks of double-stranded fibers were revealed that exhibit we…
OBJECTIVE: Nickel and cobalt ions activate ICAM1 expression on endothelial cells and keratinocytes. Furthermore, these ions are released in vitro and in vivo from the types of alloys used for vascular stents, but the full biological consequences of this release is not known. In the current study, we determined if rele…
The NBO charge distribution calculated at DFT level on the [LEX](+) species [LE=N,N'-dimethylbenzoimidazole-2(3H)-thione (3) and -2(3H)-selone (4)(Scheme 1); X=I, Br] suggests that the most likely products from the reaction 3 of 4 and with IBr are the 10-X-2 charge-transfer (CT) adduct and the 10-Se-3 "T-shaped" hyper…
The concepts of melt strength or fragility, borrowed from the description of inorganic and molecular glasses, has become popular also for metallic alloys: the kinetic fragility is described by the viscous behaviour of the liquid and the thermodynamic fragility by the entropy loss on undercooling. Using the data presen…
Porous carbons with high surface area were successfully prepared from thermoplastic precursors, such as poly (vinyl alcohol) (PVA), hydroxyl propyl cellulose (HPC) and poly (ethylene terephthalate) (PET), mixing with MgO by the carbonization at 900°C in inert atmosphere. MgO in the carbonization products was dissolved…
The synthesis of a multifunctionally equipped first generation (G1) dendrimer carrying a pentapeptide with a cathepsin[space]B cleavage site, chelating ligands for Pt2+-complexation, and a dansyl fluorescence marker is described and an investigation of its cellular uptake as well as intracellular localization by confo…
Nephrogenic fibrosing dermopathy (NFD) was first described by Cowper et al. [1] as a cutaneous fibrosing disorder associated with renal dysfunction. In the last 3 years there has been a growing body of literature regarding NFD. Clinically, skin is thickened or oedematous with indurated papules and plaques. The pathoge…
Random macropore formation in variously doped p-type silicon substrates by electrochemical anodization in aqueous HF-containing dimethylsulfoxide, dimethylformamide, or acetonitrile was investigated under different operating conditions. A systematic study of the effect of the main parameters controlling the macropore…
New hybrid nanocomposites based on a methacrylate functionalized titanium-oxo cluster as nano-cross-linker show improved mechanical properties, optical transparency and photochromic activity.
Abstract Natural hokutolite, (Ba,Pb)SO 4 , is a radioactive sulfate mineral occurring in hot-spring deposit. Unlike the limited PbSO 4 content observed in natural specimens, the present study reveals that (Ba,Pb)SO 4 crystals can be grown with compositions covering the whole solid solution series of PbSO 4 and BaSO 4…
Ordered mesoporous silicas with large-pore diameters incorporating aminopropyl groups in variable quantity have been synthesized via the co-condensation of tetraethyl orthosilicate (TEOS) and 3-tert-butyloxycarbonylaminopropyltriethoxysilane templated with nonionic surfactant P123 under acidic conditions. The deprotec…
Copper(II)- and iron(III)-modified Pb[Zr(x)Ti(1-x)]O3 ferroelectrics were investigated by means of high-field/high-frequency EPR. The results obtained suggest that Cu2+ and Fe3+ both substitute as acceptor centers for [Zr,Ti]4+. Whereas for the iron-doped system the charge compensating oxygen vacancies (V(O)**) lead t…
In this work we demonstrate the self-assembly of beta-D glucose-protected Pt nanocrystals (average particle size = 4.1 nm) into nanowire-like assemblies under ambient conditions.
By treatment of N-fused tetraphenylporphyrin rhenium(I) tricarbonyl complex with trimethylamine N-oxide, oxidation of the metal center proceeded to afford N-fused tetraphenylporphyrin rhenium(VII) trioxo complex, which was quite stable against air, light and heat.
Crystallisation of zinc(tetra(4-pyridyl)porphyrin) [Zn(tpyp)] from a CHCl3/MeOH solution affords single crystals of a new supramolecular isomer of [Zn(tpyp)]∞, which adopts a polymeric ribbon structure in which a central six-coordinate Zn centre is linked to two five-coordinate Zn cations linking the [Zn(tpyp)] units…
Highly ordered mixed framework mesoporous cubic (Im3m) or 2D hexagonal (p6m) thin films of (M1−x(Si–R)x)O2−x/2 bearing organic groups (M = Ti or Zr, R = propylamine, mercaptopropyl or phenyl, x ≤ 0.2) are obtained by one-pot dip-coating. A second organic function (R′ = hexadecyl, phenyl, sulfonate…) can be added by po…
When organic materials are placed in environments which physically confine the materials at the nanometre scale, interfacial effects and confinement-induced loss of entropy can significantly alter materials' properties such as the glass transition temperature as well as the nanoscale morphology as compared to a "free"…
Non-volatile memories (NVM) are playing an important role in the semiconductor market, thanks in particular to flash which is used mainly in cellular phones and other types of electronic portable equipment. In the coming years portable systems will demand even more NVM with high density and very high writing throughpu…