Materials Literature
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The Bi 1− x Eu x FeO 3 ( x =0, 0.05, 0.10, 0.15, 0.20, and 0.30) thin films were grown by pulsed laser deposition on Pt/Ti/SiO 2 /Si substrates, and the effects of Eu content on the structure and multiferroic properties were investigated. A structural transition from rhombohedral R 3 c to orthorhombic Pbnm occurred in…
Anatase−brookite titanium dioxide nanoparticles are derivatized with two commercial trifunctional siloxanes by a mild impregnation method. The filmed titania nanoparticles are characterized by X-ray diffraction, N 2 adsorption at subcritical temperatures (BET and BJH methods), and contact angle determinations. Startin…
<div class="section abstract"><div class="htmlview paragraph">Cu- and Fe-zeolite SCR catalysts emerged in recent years as the primary candidates for meeting the increasingly stringent lean exhaust emission regulations, due to their outstanding activity and durability characteristics. It is commonly known t…
The CVD route for carbon nanotube production has become a popular method to make large amounts of multiwall carbon nanotubes. The structure, morphology and size of carbon materials depend critically on the catalyst preparation and deposition conditions. According to current knowledge, CVD method is the only process wh…
To elucidate the growth mechanism of In 2 O 3 nanotowers synthesized via a Au-catalyzed vapor transport process, the structural evolution of In 2 O 3 nanotowers was carefully examined during the synthesis process. It was found that Au catalysts only play a role at the initial stage, where they facilitate the formation…
Surface-initiated atom transfer radical polymerization (SI-ATRP) has been used to grow brushes of poly(2-(methacryloyloxy)ethyl phosphorylcholine) (PMPC) from silicon wafers using a polyelectrolytic macroinitiator on planar silicon wafers. Film thicknesses of up to 450 nm were possible within 21 h, and the effect of a…
Single and multiple layers of graphene films were grown on (111) oriented single crystals of nickel and polycrystalline nickel films using remote plasma assisted chemical vapor deposition. Remote plasma was employed to eliminate the effect of the plasma electrical field on the orientation of the grown graphene films,…
We demonstrate using four-circle x-ray diffraction that the piezoelectric substrate of Pb(Mg1/3Nb2/3)0.72Ti0.28O3(001) induces uniform reversible in-plane strain to epitaxially-grown oxide films and bilayers. The biaxial in-plane strain depends linearly on the applied electrical voltage. Utilizing the reversible strai…
The susceptibility of Advanced High Strength Steels (AHSS) to hydrogen embrittlement (HE) was evaluated on selected high strength sheet steels (DP 600, TRIP 780, TRIP 980, TWIP-Al, TWIP, and Martensitic M220) and the results were compared to data on a lower strength (300 MPa tensile strength) low carbon steel. Tensile…
We examine graphitization of amorphous carbon (a-C) in a-C/Ni bilayer samples having the structure Si/SiO2/a-C(3–30 nm)/Ni(100 nm). In situ x-ray diffraction (XRD) measurements during heating in He at 3 °C/s to 1000 °C showed graphitic C formation beginning at temperatures T of 640–730 °C, suggesting graphitization by…
ZnO‐based materials are among the best n ‐type thermoelectric oxides known to date, with a thermoelectric figure of merit that reaches ZT=0.65 at high temperature. However, there is a large dispersion of the data reported in the literature and a controversy recently appeared about the real potential of these materials…
Poly(acrylic acid) (PAA) brushes covalently linked to mica were prepared using the graft from approach in a two-step process: (i) poly( tert -butyl acrylate) (P t BA) brushes were first synthesized by atom transfer radical polymerization directly from an activated mica substrate (ii) followed by hydrolysis to generate…
Is that a final ansa? Different room temperature ionic liquids (RTILs) are examined as solvents in the biphasic epoxidation of selected olefins with the ansa compounds 1 and 2 as catalyst precursors. Turnover frequencies of up to 44 000 h−1 are reached and the catalyst can easily be separated and recycled.
Es muss passen: Das vorgestellte Hybridmaterial besteht aus 1–2 nm großen Goldnanopartikeln, die nur über die Zeolithmikroporen in einem Silicalit-1-Kristall zugänglich sind, wie dreidimensionale TEM-Tomographie belegt (siehe Bild). In Kalzinierungsexperimenten waren die eingebetteten Nanopartikel gegenüber Sintern se…
A novel type of amphiphilic hyperbranched multiarm copolymer [H40-star-(PLA-b-PEP-OH)] was synthesized through a two-step ring-opening polymerization (ROP) procedure and applied to drug delivery. First, Boltorn H40 was used as macroinitiator for the ROP of L-lactide to form the intermediate (H40-star-PLA-OH). Then, th…
The thermal-induced and photoinduced valence tautomerism of a series of Co(dioxolene)(2)(4-X-py)(2) complexes (dioxolene = 3,5-di-tert-butylcatecholate or 3,5-di-tert-butylsemiquinonate; 4-X-py = 4-(X)pyridine, X = H (1), OMe (2), Me (3), CN (4), Br (5), NO(2) (6)) is described. The thermal valence tautomerism (ls-Co(…
Polymer‐derived SiOC/HfO 2 ceramic nanocomposites were prepared via chemical modification of a commercially available polysilsesquioxane by hafnium tetra ( n ‐butoxide). The ceramization process of the starting materials was investigated using thermal analysis and in situ Fourier‐transformed infrared spectroscopy and…
Spider silk is an ultrastrong and extensible self-assembling biopolymer that outperforms the mechanical characteristics of many synthetic materials including steel. Here we report atomic-level structures that represent aggregates of MaSp1 proteins from the N. Clavipes silk sequence based on a bottom-up computational a…
Methylpentaphenylsilole (MPPS) and tetraphenylethene (TPE) are two archetypal luminogens that show the novel effect of aggregation-induced emission (AIE). In this work, TPE moieties are attached to MPPS core as peripheral groups at 2,5- and 3,4-positions to generate new AIE luminogens. The resulting 2,5- and 3,4-BTPEM…
The application of Brillouin light scattering to the study of the spin-wave spectrum of one- and two-dimensional planar magnonic crystals consisting of arrays of interacting stripes, dots and antidots is reviewed. It is shown that the discrete set of allowed frequencies of an isolated nanoelement becomes a finite-widt…