Materials Literature
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An effective purification method for single-walled carbon nanotubes (SWNTs) based on a combination of oxidative acid treatment and reversible noncovalent functionalization with 1-pyreneacetic acid is reported. The functionalization was selective toward the nanotubes, allowing a nearly complete removal of residual meta…
Abstract Fibrous membranes of cellulose acetate (CA), poly(vinyl pyrrolidone) (PVP) and composite membranes of these polymers, were obtained by the electrospinning method. Using systematic method, the optimal conditions for preparation of fibrous membranes were found. Both CA and PVP a concentration of 8% weight was f…
Abstract Polyazomethinethiosemicarbazone (PATS) metal complexes of Ni(II), Co(II), Cu(II), Zn(II), Cd(II) and Hg(II) metal ions were prepared by reacting the polymer ligand (PATS) with the appropriate metal salt in refluxing DMSO. Elemental analyzes as well as FTIR and electronic spectral data are presented to confirm…
Abstract Optische Signale von Einzelmolekülen liefern Informationen über die Struktur und Dynamik ihrer nanoskaligen Umgebung, frei von zeitlichen und räumlichen Mittelungen. Die so erhaltenen Daten sind von Nutzen, wenn komplexe Strukturen oder Dynamiken auftreten, wie bei Polymeren oder porösen Oxiden, aber auch bei…
The template-directed assembly of two planar molecules (copper phthalocyanine (CuPc) and pentacene) on SiC nanomesh has been studied by scanning tunneling microscopy and photoelectron spectroscopy, respectively. Both molecules are trapped as single molecules in the cells of SiC nanomesh at low coverage. At high covera…
Abstract An effective condition of graft polymerization of acrylonitrile onto cellulose fiber in large volume of KMnO 4 /citric acid aqueous solution was examined and the produced grafted copolymers were characterized by using SEM, NMR, FTIR, XRD, TGA, and DSC in comparison with component homopolymers. Graft yield, GY…
Abstract The reaction of Cu(ClO 4 ) 2 · 6H 2 O with N 4 O 3 coordinating heptadentate (H 3 L 1 ) and N 2 O coordinating tridentatereduced Schiff base (HL 2 ) ligands yielded copper(II) tetranuclear complexes [Cu 4 (L 1 ) 2 ](ClO 4 ) 2 ( 1 ) and [Cu 4 (L 2 ) 4 ](ClO 4 ) 4 ( 2 ), respectively. Complex 1 crystallizes in…
A novel hybrid material comprising silver aggregates supported on the porous structure of a free-standing carbon nanotube film was devised and fabricated. This material readily allows filtration of large volumes of fluids, while retaining the active analytes on silver aggregates so that their characteristic surface-en…
Short carbon fiber reinforced poly(trimethylene terephthalate) composites (PTT/SCF) were investigated in their rheology behaviors, phase morphology, electrical, mechanical, and thermal properties by capillary rheometer, scanning electron microscope, universal tester, high insulation resistance meter, Q meter, and ther…
We report coral-inspired calcium carbonate deposition via sequestration of CO 2 directly from the atmosphere. We observed that a CaCl 2 solution containing basic components and carbonic anhydrase induced aragonitic spherulites and acicular morphologies of CaCO 3 at the air/solution interface, through the reaction of c…
Aggregating into multicellular spheroids within alginate–poly-L-lysine–alginate (APA) microcapsules is important in maintaining the cellular viability and specific functions. However, in the absence of a vascular network, cells in the core of large-sized spheroids are gradually necrotic because of oxygen transfer limi…
Abstract In this study, we synthesized an aromatic ester plasticizer with ether oxygen bonds called bis[2‐(2‐methoxyethoxy)ethyl]phthalate (BMEP), which could dissociate sodium thiocyanate (NaSCN) by a coordination effect between the ether oxygen bond and the Na + cations. An antistatic plasticizer (AP) for poly(vinyl…
Abstract Modification of low‐density polyethylene (LDPE) hyperbranched grafting with a maleic anhydride (MAH) was carried out using corotating twin screw extruder in the presence of benzoyl peroxide. The LDPE/polyamide 6 (PA6) and LDPE‐ g ‐MAH/PA6 blends were obtained with a corotating twin screw extruder. The melt vi…
The crystal-field (CF) parameters determined by various authors for rare-earth ions at monoclinic sites in AB(WO(4))(2) crystals are reanalyzed using a methodology incorporating several approaches, namely standardization, multiple-correlated fitting technique and closeness of CFP sets. In Part I recent spectroscopic d…
We consider tunneling transport through a Mn12 molecular magnet using spin density functional theory. A tractable methodology for constructing many-body wave functions from Kohn-Sham orbitals allows for the determination of spin-dependent matrix elements for use in transport calculations. The tunneling conductance at…
We introduced nitrogen ions to modify the graphene surface and its property changes were investigated. A graphene layer grown on 6H-SiC(0001) was irradiated with 100 eV nitrogen ions. Surface property changes were studied using photoemission spectroscopy (PES), near edge x-ray adsorption spectroscopy (NEXAFS), and ato…
Novel supramolecular side-chain banana-shaped liquid crystalline (LC) polymer complexes A m B n -N bearing various ( m / n ) molar ratios of hydrogen- and covalent-bonded bent-core components were acquired by the free radical polymerization, where the hydrogen-bonded (H-bonded) structures were executed via mixing equi…
Abstract Corrosion protection performance of epoxy polyamide coatings containing polypyrrole (PPy) composites for steel has been studied. PPy and its composites have been synthesized chemically using potassium permanganate and potassium per sulfate as oxidants. The PPy has been characterized by four probe method for c…
Nanostructured PbS powder and thin films of high quality and controlled thickness have been prepared from lead acetate and thiourea dissolved in ethanol by a simple dip technique. The structural properties of the powder and the films were identified by XRD. Crystallite sizes of 52.3 and 8.2 nm for both the powder and…
Abstract Two novel monomers, 9,9‐bis[4‐(4‐carboxyphenoxy)phenyl]xanthene (BCAPX) and 9,9‐bis[4‐(4‐aminophenoxy)phenyl]xanthene (BAPX) were prepared in two main steps starting from nucleophilic substitution of 9,9‐bis(4‐hydroxyphenyl)xanthene (BHPX) with p ‐fluorobenzonitrile and p ‐chloronitrobenzene, respectively. Us…