Materials Literature
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Abstract This paper deals with the cationic ring-opening polymerization of γ-thiobutyrolactone (2) and γ-thionobutyrolactone (3). The ring-opening polymerization of 3 was carried out in bulk at 100 °C for 2 h by various cationic initiators. Scandium trifuoromethane-sulfonate induced the polymerization of 3, which did…
Attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy was used to study the adsorption of charged silica particles onto TiO(2) particles coated with anionic sodium polyacrylate (NaPA) or cationic poly(diallyldimethylammonium) chloride (PDADMAC). To the best of our knowledge, this is the first…
Abstract A high surface area ruthenium dioxide with partial ordered structure has been replicated by cubic Ia3d mesoporous silica, and the replica shows high catalytic activity for the oxidation of CO to CO2 at relatively low temperature.
Strontium bismuth tantalate (SBT) thin films containing Sr defect and Bi excess have been prepared by chemical solution deposition onto spontaneously oxidized Si(100) substrates with two different heterostructure electrodes: Pt/TiO 2 and Ti/Pt/Ti. Layered perovskite SBT films were crystallized in oxygen by rapid therm…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of Diblock Copolymers Consisting of Hyaluronan and Poly(2-ethyl-2-oxazoline)Yali Yang, Kazunori Kataoka, and Françoise M. WinnikView Author Information Faculty of Pharmacy and Department of Chemistry, Université de Montréa…
Films of liquid crystalline copoly(methacrylate)s with photochromic azobenzene and benzanilide side groups and related terpolymers with additional dye side groups were oriented by the irradiation with linearly polarized visible or, alternatively, UV light. The orientational behaviors of the terpolymers with benzoxazol…
Frequency-scanned excitation profiles of coherent second harmonic generation (SHG) were measured for silver nanoparticle arrays prepared by nanosphere lithography. The frequency of the fundamental beam did not coincide with the localized surface plasmon resonance (LSPR) of the nanoparticles and was tuned so that the c…
Crystal structures and phase transitions in ferromagnetic shape memory alloys based on Co–Ni–Al and Co–Ni–Ga, Brown, P J, Ishida, K, Kainuma, R, Kanomata, T, Neumann, K-U, Oikawa, K, Ouladdiaf, B, Ziebeck, K R A
Spherical micelles of the diblock copolymer/surfactant Brij 700 (C(18)EO(100)) in water (D(2)O) solution have been investigated by small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS). SAXS and SANS experiments are combined to obtain complementary information from the two different contrast co…
One important requirement for future applications of carbon nanotube electronic devices is the ability to controllably grow carbon nanotubes on metal electrodes. Here we show that it is possible to grow small diameter (<10 nm) vertically aligned carbon nanotubes on different metal underlayers using plasma-enhanced che…
Abstract The pore arrangement of mesoporous tantalum oxide prepared with a block copolymer surfactant as a structure-directing agent is remarkably improved by optimizing the amounts of metal source and water content. In contrast to the wormhole-like pore structure observed in the mesoporous tantalum oxide prepared und…
(1)H NMR spectroscopy and powder X-ray diffraction have been used to explore the details of anion exchange reactions of two layered hydroxy double salts (HDSs), zinc copper hydroxy acetate (ZCA), nickel zinc hydroxy acetate (NZA), and a related layered material, zinc hydroxy acetate (ZHA), at room temperature (21-22 d…
Selective, well controlled and directionally grown Sn doped In 2 O 3 nanowires (In 2 O 3 : Sn nanowires, SIO NWs) were synthesized at a low fabrication temperature ( ) through a vapour–liquid–solid (VLS) process under a precise carrier gas flow. The majority of the SIO NWs are grown along [222], with [400] and [440] a…
A novel method for generating nanomaterials is developed by performing laser ablation of silicon crystals in supercritical fluid. The method is shown to successfully generate silicon nanoclusters, and to allow for the selective generation of clusters having different electronic structures. This selective fabrication e…
To improve the stability of lysozyme-incorporated polyion complex (PIC) micelles in physiological condition, three types of hydrophobic groups, including phenyl (Phe), naphthyl (Nap), and pyrenyl (Py) terminal groups, were separately introduced to the omega-end of poly(ethylene glycol)-poly(alpha,beta-aspartic acid) b…
Examination of the catalysts recovered in the N,N-dihexylcarbodiimide-palladium nanoparticle composite catalyzed Suzuki cross-coupling reactions revealed that the metal nanoparticles transformed gradually from spherical-shape to larger needle-shaped crystals. Two types of Ostwald ripening processes were observed. One…
Reactions of a quadridentate ligand [N-(2-hydroxy-5-nitrobenzyl)iminodiethanol] with iron and manganese chloride in methanol yielded an antiferromagnetic FeIII6 ring and a single-molecule magnet MnII3MnIII4 wheel, respectively.
Two new polymeric azido-bridged manganese complexes of formulas [Mn(N3)2 (bpee)]n (1) and {[Mn(N3)(dpyo)Cl(H2O)2](H2O)}n (2) [bpee, trans-1,2-bis(4-pyridyl)ethylene; dpyo, 4,4'-dipyridyl N,N'-dioxide] have been synthesized and characterized by single-crystal X-ray diffraction analysis and low-temperature magnetic stud…
We demonstrate the continued growth of single-walled carbon nanotubes (SWNTs) from ordered arrays of open-ended SWNTs in a way analogous to epitaxy. Nanometer-sized metal catalysts were docked to the SWNT open ends and subsequently activated to restart growth. SWNTs thus grown inherit the diameters and chirality from…
An H2L Schiff-base ligand that was obtained from the monocondensation of diaminomaleonitrile and 4-(diethylamino)salicylaldehyde is reported together with four related nickel(II) complexes formulated as [Ni(L)(L')] (L' = MePhCHNH2, iPrNH2, Py, and PPh3). Crystal structures have been solved for H2L, [Ni(L)(MePhCHNH2)],…