Materials Literature
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Anodic aluminum oxide (AAO) was used as substrates of microstructure fabrication. Complex structures with high aspect ratios were obtained by the single-step wet etching of the AAO substrates. Structures with different shapes and aspect ratios could be simultaneously obtained with vertical sidewalls. The surface morph…
Full three-dimensional diffuse neutron scattering data have been recorded from a single crystal of Pb(Zn 1/3 Nb 2/3 )O 3 (PZN) at 300 K using the time-of-flight Laue technique on the SXD single-crystal instrument at ISIS. The data show a series of diffuse rods of scattering oriented parallel to each of the six 〈1 1 0〉…
The lattice parameter of bismuth nanowires has been measured using the in situ high-temperature x-ray diffraction method. Single-crystalline Bi nanowire arrays with the diameters from 10nmto250nm have been fabricated within the porous anodic alumina membranes by a pulsed electrodeposition technique. Different temperat…
SrAl(2)O(4): Ln (Ln = Ce(3+), Pr(3+), Tb(3+)) nanocrystals have been synthesized by the combustion method. The results of XRD indicated that the resulting SrAl(2)O(4): Ln (Ln = Ce(3+), Pr(3+), Tb(3+)) nanocrystals have a reduced and distorted monoclinic lattice compared with bulk materials. The spectral properties are…
A polystyrene−poly(ethylene- alt -propylene) diblock copolymer, S/EP 7/13, exhibits a thermoreversible mesophase transition between low-temperature hexagonally perforated lamellae (HPL) and high-temperature hexagonally packed cylinders (C). The transformation process is accompanied by a 6% change in the principal spac…
The effect of sonification on d -fructose hydrogenation over several heterogeneous catalysts was investigated. The reaction rate and selectivity were studied at different temperatures, pressures, and ultrasonic power inputs. The ultrasonic effects were clearly catalyst dependent. The sonification during the hydrogenat…
A new software package has been developed, named Organa , for ab initio solution of crystal structures from powder diffraction data by direct-space methods. The package contains energy-guiding Monte Carlo and grid-search algorithms and is based on a combined global minimization of the R factor and a potential energy f…
Self-assembly by soft symmetry! We report the self-assembly of Pt nanoparticles into nanofibers from Pt salts in very dilute aqueous solution or in swollen liquid crystals (SLCs). The symmetry of these SLC soft templates can be used to organize these self-assemblies into larger controlled shapes (fibers, as shown in t…
The novel copper(I)-thioantimonates(III) (C(6)N(2)H(18))(0.5)Cu(2)SbS(3) (I) (C(6)N(2)H(16) = 1,6-diaminohexane), (C(4)N(3)H(15))(0.5)Cu(2)SbS(3) (II) (C(4)N(3)H(13) = diethylenetriamine), (C(8)N(4)H(22))(0.5)Cu(2)SbS(3) (III) (C(8)N(4)H(20) = 1,4-bis(2-aminoethyl)piperazine), (C(4)N(3)H(14))Cu(3)Sb(2)S(5) (IV) (C(4)N…
Eine Inversion der Excitonenchiralität sowie strukturelle Änderungen beim Übergang vom kinetischen zum thermodynamischen Selbstorganisat sind ein Merkmal helicaler Bis(merocyanin)farbstoff-Nanostäbchen (siehe Bild), wie zeitabhängige CD-Spektroskopie und Rasterkraftmikroskopie belegen.
We have theoretically investigated the effect of a coating made of the elastically dissimilar material on the acoustic phonon properties of semiconductor nanowires . It is shown that the acoustic impedance mismatch at the interface between the nanowire and the barrier coating affects dramatically the phonon spectra an…
Photocurrent and photoconductivity measurements have been used in combination with absorption and magnetic circular dichroism (MCD) spectroscopic measurements to elucidate the mechanism of photoinduced carrier generation in nanocrystalline Co(2+):ZnO electrodes. These experiments allowed direct observation of two broa…
Two new reversible addition-fragmentation transfer (RAFT) agents with 8 and 16 terminal dithiobenzoate groups on the surface of poly(propylene imine) dendrimers (generation 2.0 and 3.0, respectively) were prepared, and successively they were used in the RAFT polymerization to produce well-defined dendrimer-star polyme…
Two unique helical zinc gallate (ZnGa2O4) nanostructures were synthesized by thermal evaporation using the zinc selenide (ZnSe) nanowires; helical ZnGa2O4 nanowire rolls either on a straight ZnSe nanowire support or without any support. They all consist of single-crystalline cubic ZnGa2O4 crystals without any dislocat…
A recently discovered series of quaternary compounds of the general type [K(m)(ROH)(n)()][M(x)Sn(y)()Se(z)] (R = H, Me), containing ternary anions with [SnSe(4)](4-)-coordinated transition metal centers (M = Co, Mn, Zn, Cd, Hg) has now been extended by the synthesis and characterization of the two ortho-thiostannate-c…
A series of lanthanide(III) complexes formulated as M[Ln(Hdo3ap)].xH(2)O (M = Li or H and Ln = Tb, Dy, Er, Lu, and Y) with the monophosphonate analogue of H(4)dota, 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic-10-methylphosphonic acid (H(5)do3ap), was prepared in the solid state and studied using X-ray crystallograp…
The major protein component of the extrapallial fluid of the mollusc Mytilus edulis has been previously isolated and partially characterized. It was postulated to play a role in shell mineralization because of its intriguing property of Ca(2+)-binding-induced self-assembling. However, it also binds other divalent ions…
The rectified diffusion growth of a single air bubble levitated in an acoustic field (frequency = 22.35 kHz) in water and in aqueous solutions containing surfactants (sodium dodecyl sulfate and sodium dodecylbenzene sulfonate) was investigated. As reported by Crum (J. Acoust. Soc. Am. 1980, 68, 203), the presence of s…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTHyperbranched Oxadiazole-Containing Polyfluorenes: Toward Stable Blue Light PLEDsYu Xin, Gui-An Wen, Wen-Jing Zeng, Lei Zhao, Xing-Rong Zhu, Qu-Li Fan, Jia-Chun Feng, Lian-Hui Wang, Wei, Bo Peng, Yong Cao, and WeiWei HuangView Autho…
Broadband dielectric spectroscopy (10 -1 −10 6 Hz) and differential scanning calorimetry measurements have been performed to study the molecular dynamics of water solutions of poly(vinyl methyl ether) (PVME) in the concentration region up to 50 wt % and in the temperature range from 150 to 250 K in order to investigat…