Materials Literature
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Tetracationic water-soluble porphyrin (H(2)P(4+)) has been immobilized by pi-pi stacking interactions onto the skeleton of carbon nanohorns (CNH), without disrupting their pi-electronic network. The stable aqueous solution of the CNH-H(2)P(4+) nanoensemble was examined by both electron microscopy and spectroscopic tec…
Galfenol (Fe1-xGax, where x ranges from 0.19 to 0.30) thin films have been successfully fabricated onto thin glass cover slides using RF sputtering. The Ga composition in the thin films was controlled by the forward power. The films had a preferred (110) orientation. The magnetic response as a function of applied magn…
Copper (Cu) dual-damascene interconnects with a self-formed MnSixOybarrier layer were successfully fabricated. Transmission electron microscopy shows that approximately 2-nm thick and continuous MnSixOylayer was formed at the interface of Cu and dielectric SiO2, and that no barrier was formed at the via bottom because…
AIMS: To characterize and optimize a novel Bacillus pumilus strain isolated from biological waste which produces protease with excellent dehairing effect. This newly isolated strain could be utilized in the industrial leather dehairing process. METHODS AND RESULTS: Bacterial strains secreting proteases were screened f…
We demonstrate the first channel waveguides made of E7 nematic liquid crystal (LC) in SiO2-Si V-grooves. The grooves have been obtained by wet etching n-Si substrates first and then by thermally growing an approximately 2-mum-thick SiO2cladding layer. Propagation of infrared light at a wavelength of 1550 nm shows a go…
With the use of the tailored cyanometalate precursor, (Bu4N)[(Tp)Fe(CN)3] (Tp = Tris(pyrazolyl)hydroborate) as the building block to react with fully solvated Cu(II), Co(II), and Ni(II) cations, four one-dimensional (1D) heterobimetallic cyano-bridged chain complexes of squares, [(Tp)2Fe(III)2(CN)6Cu(CH3OH).2CH3OH]n (…
This paper presents electrocaloric measurements on 0.75(PbMg 1/3 Nb 2/3 O 3 )–0.25(PbTiO 3 ) ceramics. Reversible heat exchanged up to 0.15 J g −1 with an applied field of 1.35 kV mm −1 was obtained. The interpretation of this observation is based on direct polarization measurements. Starting from the integration alon…
A new method to grow bulk quantities of single-walled carbon nanotubes (SWCNTs) by a catalytic chemical vapor deposition (CVD) process with the possibility of varying the pressure has been developed and is reported in this paper. Thermal decomposition of ferrocene provides both catalytic particles and carbon sources f…
Acyl carrier proteins play a central role in metabolism by transporting substrates in a wide variety of pathways including the biosynthesis of fatty acids and polyketides. However, despite their importance, there is a paucity of direct structural information concerning the interaction of ACPs with enzymes in these pat…
Biomineral-forming organisms provide inspiration for developing new reaction pathways to functional materials, such as rutile for optical devices. A recombinant protein (rSilC) was designed based on the sequence of a silica-forming protein from a diatom. This unique protein induced the formation of hierarchically nano…
Single-walled carbon nanotube (SWCNT) bundles have the potential to provide an attractive solution for the resistivity and electromigration problems faced by traditional copper interconnects. This paper discusses the modeling of nanotube bundle resistance for on-chip interconnect applications. Based on recent experime…
Lanthanide-organic coordination polymeric networks of [Ln(III)2(suc)3(H2O)2].0.5H2O [suc = succinate dianion, Ln = Pr (1), Nd (2), Sm (3), Eu (4), Gd (5), and Dy (6)] have been synthesized and characterized by single-crystal X-ray diffraction analyses. The structural determination reveals that complexes are isomorphou…
The effective spin pressure induced by an electric current on a domain wall in a ferromagnet is determined using a simple classical model, which allows us to extend previous theories to arbitrary domain wall widths. In particular, the role of spatially non-uniform components of the torques are analyzed in detail. We f…
The grain size and magnetic properties of sintered Nd14.3Fe78.9TM1.2B5.6(TM: Co, Cu, Al, Ga) magnets have been examined in dependence on the powder particle size and distribution. The mean grain size decreases almost linearly with the mean particle size and seems to become more homogeneous with a decreasing width of t…
Molecular dynamics simulations of first-principles-based effective Hamiltonians for $\mathrm{Pb}({\mathrm{Sc}}_{1/2}{\mathrm{Nb}}_{1/2}){\mathrm{O}}_{3}$ under hydrostatic pressure and for $\mathrm{Pb}({\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}){\mathrm{O}}_{3}$ at ambient pressure show clear evidence of a relaxor state i…
The classical spin-flop is the field-driven first-order reorientation transition in easy-axis antiferromagnets. A comprehensive phenomenological theory of easy-axis antiferromagnets displaying spin-flops is developed. It is shown how the hierarchy of magnetic coupling strengths in these antiferromagnets causes a stron…
Lipase catalysis was successfully employed to synthesize high molecular weight poly(butylene succinate) (PBS). Attempts to copolymerize succinic acid with 1,4-butanediol were unsuccessful due to phase separation of the reactants. To circumvent this problem, monophasic reaction mixtures were prepared from diethyl succi…
We investigate the scaling properties of postmortem fracture surfaces in silica glass and glassy ceramics. In both cases, the 2D height-height correlation function is found to obey Family-Viseck scaling properties, but with two sets of critical exponents, in particular, a roughness exponent zeta approximately 0.75 in…
The adhesion properties and catalytic activity of rutile TiO(2)(110)-supported Au(7) nanoclusters in different oxidation states are investigated by means of density functional theory. The calculations cover both surface science conditions of reduced TiO(2) and real catalyst conditions of oxidized (alkaline) TiO(2) sup…
We study sequence-dependent complexation between oligonucleotides (single-strand DNA) and various generation ethylene diamine (EDA) cored poly amido amide (PAMAM) dendrimers through atomistic molecular dynamics simulations accompanied by free energy calculations and inherent structure determination. Simulations reveal…