Materials Literature
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Novel ZnO cone arrays with controllable morphologies have been synthesized on silicon (100) substrates by thermal evaporation of metal Zn powder at a low temperature of 570 degrees C without a metal catalyst. Clear structure evolutions were observed using scanning electron microscopy: well-aligned ZnO nanocones, doubl…
The UV absorption spectrum of the permanganate anion is a prototype transition-metal complex spectrum. Despite this being a simple d0 Td system, for which a beautiful spectrum with detailed vibrational structure has been available since 1967, the assignment of the second and third bands is still very controversial. Th…
Summary The red and yellow colours of ferralitic soils in the tropics have for long intrigued pedologists. We have investigated the upward yellowing in a 10‐m thick profile representative of the Ferralsols of the plateaux of the Manaus region of Brazil. We determined changes in the nature and crystal chemistry of thei…
High molecular weight, soluble, air- and moisture-stable, highly metallized (>25 wt% metal) polyferrocenylsilanes (PFS) [Fe(eta-C5H4)2Si(Me){Co2(CO)6C2Ph}]n (Co-PFS), [Fe(eta-C5H4)2Si(Me){Mo2-Cp2(CO)4C2Ph}]n (Mo-PFS), and [Fe(eta-C5H4)2Si(Me){Ni2Cp2C2Ph}]n (Ni-PFS) containing pendant cobalt, molybdenum, and nickel clu…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA Water-Soluble and Self-Doped Conducting Polypyrrole Graft CopolymerWoo Jin Bae, Keon Hyeong Kim, Won Ho Jo, and Yun Heum ParkView Author Information Hyperstructured Organic Materials Research Center and School of Materials Science…
This study was designed to assess the influence of varied release kinetics of the osteogenic thrombin peptide TP508 from osteoconductive poly(propylene fumarate)-based (PPF) composite scaffolds on bone formation in vivo. Four classes of scaffolds were constructed with different TP508 dosages (200, 100, or 0 microg) an…
We report the first combined optical and structural investigation of the water free Er-quinolinolate complex, an organo-lanthanide system of interest for 1.5-microm telecom applications. Structural data demonstrate that the complex has a trinuclear structure (Er3Q9) which provides the Er metals with an octa-coordinati…
The first example of a highly ordered periodic mesoporous thiophene-bridged organosilica (PMO) with large pores is reported. The synthesis was carried out under acidic conditions using a polyalkylene oxide triblock copolymer (Pluronic P123) as supramolecular structure-directing agent. Materials with pore sizes between…
The representation surfaces of the piezoelectric strain coefficient (d) were calculated for [011], [001], and [111] poled lead magnesium niobate–lead titanate (PMN–PT) crystals with ∼31% PT. It was discovered that the zxt±45° cut (rotation around z axis ±45°) for [011] poled PMN–PT crystal gives a unique repolable she…
Thermally responsive polyelectrolyte multilayers were made from charged poly( N -isopropylacrylamide) (PNIPAM) copolymers. The temperature-dependent water content of the thin film, studied in situ using attenuated total reflectance Fourier transform infrared (ATR−FTIR) spectroscopy, revealed microscopic and macroscopi…
Recent progress in chemical vapour deposition (CVD) diamond technology has enabled the preparation of high-quality n-type CVD diamond layers using phosphorus as a dopant. CVD diamond can therefore be considered as a new interesting conventional wide-gap semiconducting material having both n- and p-type dopants, which…
This paper reports a study on the template-based growth and electrochromic properties of single-crystal vanadium pentoxide nanorod arrays by sol electrophoretic deposition. The formation of single-crystal vanadium pentoxide nanorods is attributed to the homoepitaxial aggregation of nanoparticles. Nanorod arrays have d…
Well-relaxed atomistic configurations of model cis -1,4-poly(butadiene) (PB) systems, ranging in molecular length from C 32 to C 400, have been subjected to detailed molecular dynamics simulations in the NPT ensemble for times up to 600 ns. Results are presented for the static and (mainly) dynamic properties of these…
Random copolymers were prepared by Candida antarctica lipase B (Novozyme-435) catalyzed copolymerization of omega-pentadecalactone (PDL) with epsilon-caprolactone (CL). Over the whole composition range PDL-CL copolymers are highly crystalline (melting enthalpy by differential scanning calorimetry, above 100 J/g; cryst…
Using numerical simulation techniques such as the transfer matrix method and the commercially available code Microwave Studio, we study the transmission properties of left-handed (LH) metamaterials and arrays of split-ring resonators (SRRs). We examine the dependence of the transmission through single- and double-ring…
We discuss a free boundary problem for two moving solid-liquid interfaces that strongly interact via the diffusion field in the liquid layer between them. This problem arises in the context of liquid film migration (LFM) during the partial melting of solid alloys. In the LFM mechanism the system chooses a more efficie…
Bundles of many fibers, with statistically distributed thresholds for breakdown of individual fibers and where the load carried by a bursting fiber is equally distributed among the surviving members, are considered. During the breakdown process, avalanches consisting of simultaneous rupture of several fibers occur, wi…
The static and dynamic properties of the isotropic XY-model $(s=1/2)$ on the inhomogeneous periodic chain, composed of \emph{N} segments with \emph{n} different exchange interactions and magnetic moments, in a transverse field \emph{h} are obtained exactly at arbitrary temperatures. The properties are determined by in…
A numerical approach is proposed for studying the quantum optical modes in the Klein-Gordon lattices where the energy contribution of the atomic displacements is non-quadratic. The features of the biphonon excitations are investigated in detail for different non-quadratic contributions to the Hamiltonian. The results…
Highly dispersed gold particles (<2 nm) were synthesized within the pores of mesoporous silica with pore sizes ranging from 2.2 to 6.5 nm and different pore structures (2D-hexagonal, 3D-hexagonal, and cubic). The catalysts were reduced in flowing H2 at 200 degrees C and then used for CO oxidation at temperatures rangi…