Materials Literature
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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…
The synthesis of the Mn(II) phase 4H-Ba(0.5)Sr(0.5)MnO(2+delta) via the topotactic reduction of 4H-Ba(0.5)Sr(0.5)MnO(3-x) with the novel reducing agent LiH, is described. Neutron powder diffraction data show that oxide ions are deintercalated from the host structure in a disordered manner to yield "tetrahedral" MnO(4)…
Fabrication and operation of hybrid flexible vertical nanoscale diodes are reported. The diodes, formed by n-type ZnO and p-type CuSCN, were embedded in a 6 µm polymer foil, provided with vertical cylindrical openings of about 100 nm, by using a low temperature solution based electrochemical deposition technique. Elec…
Bacterial dihydroxyacetone (Dha) kinases do not exchange the ADP for ATP but utilize a subunit of the phosphoenolpyruvate carbohydrate phosphotransferase system for in situ rephosphorylation of a permanently bound ADP-cofactor. Here we report the 2.1-angstroms crystal structure of the transient complex between the pho…
We perform electrostatic force microscopic measurements to reveal the mechanisms of the photoresponse from polymer-coated carbon nanotube transistors, where the effective gating due to the trapping of photogenerated electrons at SiO 2 dielectric surfaces is found dominant. The distant photoresponse and the unique spat…
In recent years metal-enhanced fluorescence (MEF) using silver particles has been reported for a number of fluorophores emitting at visible wavelengths. However it was generally thought that silver particles would always quench fluorescence at shorter wavelengths. We now report the observation of metal-enhanced fluore…
Symmetrische photospaltbare Bisglutamat-Käfige wurden synthetisiert, die einen Neurotransmitter mit bislang unerreichten Zweiphotoneneffizienzen freisetzen (siehe Bild). Das Fluorenderivat BNSF-Glu erreicht bis zu 5 GM bei 800 nm, dem optimalen Strahlungsfenster in Bezug auf Gewebedurchlässigkeit und verfügbare Laserq…
A structural, magnetic and Mössbauer spectral study of the magnetocaloric Mn1.1Fe0.9P1−xGex compounds, Sougrati, Moulay T, Hermann, Raphaël P, Grandjean, Fernande, Long, Gary J, Brück, E, Tegus, O, Trung, N T, Buschow, K H J