Materials Literature
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In this article, we review the recent advances in the field of block copolymer membranes. We discuss the similarities and differences between natural membranes and their polymeric counterparts, pointing out the advantages of the latter in applications for biosciences and biomaterials. Membrane properties are discussed…
Tissue engineering of small diameter (<5 mm) blood vessels is a promising approach to develop viable alternatives for autologous vascular grafts. Development of a functional, adherent, shear resisting endothelial cell (EC) layer is one of the major issues limiting the successful application of these tissue engineered…
A series of pyrene based dyad systems together with their dicobalt hexacarbonyl complexes (1b-6b) were synthesized. The pyrene-thiophene dyads are luminescent in room temperature solution with luminescence lifetimes on the nanosecond time scale. At room temperature the dyad emission is quenched by coordination to a Co…
Evidence is presented that vacancy-hole or vacancy-tube (similar to vacancy loops in crystalline materials) migration constitutes an important self-diffusion mechanism in multiwall carbon nanotubes (MWCNTs) when they were irradiated by an electron beam at about $2000\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$…
The metastable binary intermetallic compound Cd4Sb3 was obtained as polycrystalline ingot by quenching stoichiometric Cd-Sb melts and as mm-sized crystals by employing Bi or Sn fluxes. The compound crystallizes in the monoclinic space group Pn with a = 11.4975(5) A, b = 26.126(1) A, c = 26.122(1) A, beta = 100.77(1) d…
The supercurrent in a Josephson junction composed of the zigzag edged graphene nanoribbon (ZGNR) lying between two superconducting leads [superconductor-graphene-superconductor (SGS) junction] has been studied by the Green's function method. It is found that a small transverse electric field applied on the ZGNR can re…
Eine hohe Aktivität ist die Folge der plötzlichen Bildung von fehlgeordnetem oxidiertem Platin über einem Platinkatalysator auf einem Aluminiumoxidträger (siehe Bild). Für diese hohe Aktivität sind eine hohe Temperatur und eine niedrige Kohlenmonoxidkonzentration notwendig.
This report focuses on the effects of different Br2 doping levels on the radial breathing modes of "double-wall carbon nanotube (DWNT) buckypaper". The resonance Raman profile of the Br2 bands are shown for different DWNT configurations with different Br2 doping levels. Near the maximum intensity of the resonance Rama…
Changes in absorption spectra during doping of oligopyrroles were investigated with time-dependent density functional theory on optimized structures of neutral, singly, and doubly charged pyrrole oligomers with up to 24 rings. In the absence of counterions, defects are delocalized. Counterions induce localization. For…
The biocompatibility of cuprammonium rayon (Cu), cellulose acetate, polysulfone (Ps) and polyacrylonitrile hollow-fiber dialyzers and a polycarbonate-polyether flat plate dialyzer has been investigated. The Cu dialyzer resulted in more complement activation and a greater degree of leukopenia than the others, while the…
The organofunctional silicon hydride halides R(CH 3 )SiHCl were prepared in high yields from CH 3 SiHCl 2, employing CH 3 SiH 2 Cl as an intermediate. CH 3 SiHCl 2 was converted to CH 3 SiH 2 Cl by chloride−hydride redistribution in 41% yield (based on Si−H). The chloride substituent in CH 3 SiH 2 Cl reacted selective…
Abstract We have investigated the molecular dynamics of poly(ethylene glycol‐ co ‐cycloxeane‐1,4‐dimethanol terephthalate) (PETG) nanocomposites based on a organically modified layered silicate. Intercalated nanocomposites were prepared by melt compounding technique as evidenced from the X‐ray diffraction and transmis…
Abstract Novel, fluorinated copolymers with different architectures bearing sulfopropyl groups were synthesized in a three‐step procedure. The first step involved atom transfer radical polymerization (ATRP) of aromatic fluorinated monomers followed by two modification reactions performed on the polymer chain: demethyl…
Out-of-equilibrium photoinduced switching from the low-spin to the high-spin state has been investigated on the iron(II) complex $[{\text{Fe}}^{(\text{II})}(\text{DPEA}){(\text{NCS})}_{2}]$ by both optical reflectivity and magnetic measurements under continuous light irradiation at low temperature. The photoinduced HS…
A single crystal of the relaxor ${\text{PbMg}}_{1/3}{\text{Nb}}_{2/3}{\text{O}}_{3}$ is studied by hyper-Raman scattering. The relative scattering intensities obtained for the band near $250\text{ }{\text{cm}}^{\ensuremath{-}1}$ in various polarization geometries are fully compatible with hyper-Raman spectroscopy tens…
Abstract Five types of melamine‐formaldehyde microcapsules, that is, with shells of different compositions [melamine formaldehyde shell or a melamine formaldehyde‐poly(hexamethylene adipate glycol) shell] and containing or not a flame retardant, diammonium hydrogen phosphate (DAHP), have been prepared by an in situ po…
A systematic study of structural, magnetic, and transport properties was performed on (In 0.85− x Fe 0.15 Cu x ) 2 O 3 (IFCO) and (In 0.80− x Sn 0.05 Fe 0.15 Cu x ) 2 O 3 (ISFCO) compounds with x = 0, 0.02, and 0.05. All the studied samples show clear room temperature ferromagnetism and the saturated magnetic moment d…
The formation of electrostatically linked complexes between [Ru(bpy) 3 ]Cl 2 or [Ru(bpy) 2 (Mebpy-py)](PF 6 ) 2 and (TBA) 6 α-[P 2 W 18 O 62 ] or (TBA) 5 K 2 α 2 -[Fe III (H 2 O)P 2 W 17 O 61 ] in solution were studied by steady-state absorption and luminescence spectroscopy. The stoichiometry and global association c…
In this study, we have examined the transfection of aqueous CdS quantum dots (QDs) in the cytoplasm of PC12 neuronal cells using polyethylenimine (PEI) as carrier. The CdS QDs were prepared using a unique aqueous synthesis method, at 5 nm in size and capped with 3-mercaptopropyltrimethoxysilane (MPS). They exhibited a…
We demonstrate how we can tune the size, shape, surface functionality and properties of nanoparticles and use them as ideal model systems for fundamental investigations as well as for materials applications. In particular we describe ways to create functionalized core-shell particles with various degree of anisotropy…