Materials Literature
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When polyelectrolyte-neutral block copolymers are mixed in aqueous solutions with oppositely charged species, stable complexes are found to form spontaneously. The mechanism is based on electrostatics and on the compensation between the opposite charges. Electrostatic complexes exhibit a core-shell microstructure. In…
Anisotropic II-VI semiconductor nanocrystals and nanoparticles have become important building blocks for (potential) nanotechnological applications. Even though a wide variety of differently shaped nanoparticles of this class can be prepared, the underlying mechanisms are mostly not fully understood. This Review artic…
This work reports on structural and magnetic investigations of the Heusler compound Co2FeSi. X-ray diffraction and Mößbauer spectrometry indicate an ordered L21 structure. Magnetic measurements by means of x-ray magnetic circular dichroism and magnetometry revealed that this compound is, currently, the material with t…
During the last years, several groups across the world have concentrated on the adaptation and further development of electrospinning (e‐spinning) to enable ceramic fiber synthesis. Thus far, more than 20 ceramic systems have been synthesized as micro‐ and nanofibers. These fibers can be amorphous, polycrystalline, de…
Poly(amidoamine) (PAMAM) dendrimer-based multifunctional cancer therapeutic conjugates have been designed and synthesized. The primary amino groups on the surface of the generation 5 (G5) PAMAM dendrimer were neutralized through partial acetylation, providing enhanced solubility of the dendrimer (in conjugation of FIT…
Abstract Poly( N‐ isopropylacrylamide ‐co‐ sodium acrylate) copolymer brushes grafted on SiO 2 ‐coated quartz crystal surface were prepared with a surface‐immobilized initiator. The collapse and swelling of the thermally sensitive copolymer brushes in water were studied with quartz crystal microbalance in situ . The f…
Superactivated carbon and carbon nanotubes are both considered potential hydrogen carriers. Adsorption isotherms of H2 on activated carbon AX-21 and multi-wall carbon nanotubes were collected with a volumetric method for the temperature range of 77, 233–298 K and pressures up to 7 or 10 MPa. Based on the experimental…
A method of rapid capillary sample loading of either dry powder or polycrystalline slurry has been developed. By embedding a Millipore filter in a Kapton capillary tube, one can then draw either loose dry powder or polycrystalline slurry into the tube and pack the solid against the filter, creating a dense column of p…
A sharp maximum in the temperature dependence of the relaxation time obtained from low-frequency permittivity measurements is found in the quasi-one-dimensional conductor (TMTTF) 2 AsF 6 at a temperature of 101 K. This maximum is associated with the second-order phase transition into a charge-ordered state of Wigner t…
Orientation maps similar to electron backscatter diffraction maps can be obtained in a transmission electron microscope. A method of such mapping by automatic indexing of electron diffraction patterns has been proposed recently. The procedure is relatively simple and fast but it does not avoid the 180° ambiguity. Usin…
Abstract Summary: Due to its unique combination of properties, PTT is a promising material for textile fibre and engineering thermoplastic applications, both as neat polymer and in formulated products. To bring down the cost yet keeping some of its advantageous properties it seems interesting to apply PTT in blends an…
Abstract The Keggin dodecatungstoarsenato anion of HNa 2 [AsW 12 O 40 ] is inherently unstable in aqueous hydrogen peroxide and is mainly degraded to [AsO 4 {W 2 O 2 (μ‐O 2 ) 2 (O 2 ) 2 } 2 ] 3– , [HAsO 4 {W 2 O 2 (μ‐O 2 ) 2 (O 2 ) 2 }] 2– and [{WO(O 2 ) 2 (H 2 O)} 2 (μ‐O)] 2– . These anions were isolated as salts and…
Abstract The ordered honeycomb structures of poly( L ‐lactic‐ co ‐glycolic acid) and poly( D , L ‐lactic‐ co ‐glycolic acid) fabricated in a humid atmosphere were reported in this paper. It was found that surfactants were important in the formation of honeycomb films of hydrophobic polymer. The affecting factors, such…
The reaction of Fe2+ with CN-, which was first performed in 1704, has been used to synthesize a new series of basic [FeII,III(CN)4L2]n- complexes, where L is a monodentate ligand. trans-Na2[FeII(CN)4(DMSO)2] and cis-[NEt4]2[FeII(CN)4(pyridine)2] are synthesized by the direct reaction of FeCl2 with 4 equiv of CN- in DM…
The influence of uniaxial stress on local vibrational modes of hydrogen in ZnO has been studied by IR absorption spectroscopy. The defects considered are two centers tentatively assigned to isolated hydrogen trapped at the bond-centered and antibonding sites, a defect related to hydrogen trapped by a substitutional Li…
Silicon atoms are found to form an ordered overlayer on the fivefold surface of the icosahedral $\mathrm{Al}\text{\ensuremath{-}}\mathrm{Pd}\text{\ensuremath{-}}\mathrm{Mn}$ quasicrystal. Using scanning tunneling microscopy, the adsorption site is identified as the center of truncated clusters which are building block…
Abstract The object of this work is to investigate the microwave absorbing properties of nanocomposite bulk samples. As filler we used magnetite with different particle size in a silicone rubber matrix and investigated the influence of the filler concentration and particle size in the polymer matrix on the microwave n…
Abstract The miscibility and crystallization behavior of poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (P(HB‐ co ‐HV))/poly(vinyl acetate) (PVAc) blends have been investigated by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). It was found that P(HB‐ co ‐HV)/PVAc blends were miscible i…
Abstract The synthesis of original fluorinated (co)telomers containing vinylidene fluoride (VDF) or VDF and hexafluoropropene (HFP) was achieved by radical telomerizations and (co)telomerizations of VDF (or VDF and HFP) in the presence of 1, 6‐diiodoperfluorohexane via a semisuspension process. tert ‐Butyl peroxypival…
The dc magnetization $(M)$ and electrical resistivity $(\ensuremath{\rho})$ as functions of magnetic field and temperature are reported for a series of lightly electron doped ${\mathrm{Ca}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}\mathrm{Mn}{\mathrm{O}}_{3}$ $(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.10)$ specimens…