Materials Literature
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The mixed dioctahedral-trioctahedral character of Mg-rich palygorskite has been previously described by the formula\n\t\t\t\t yMg5 Si8 O20(OH)2(OH2)4(1–y)[xMg2Fe2(1–x)Mg2 Al2] Si8 O20(OH)2(OH2)4, where y is the trioctahedral fraction of this two-chain\n\t\t\t\t ribbon mineral with an experimentally determined upper li…
A facile approach has been developed for the synthesis of SnTe nanocrystals using triethanolamine as the stabilizing agent. The size of SnTe nanoparticles can be readily tuned from 2.7 to 32 nm. Powder X-ray diffraction and selective-area electron diffraction (SAED) indicate that the nanoparticles adopt the cubic rock…
Abstract In order to further improve the efficiency and stability of luminescent electrochemical polymerization (EP) films and devices, electroactive self‐assembled monolayers (SAMs) of carbazolyl alkanethiol are successfully designed and applied to modify Au electrode and covalently graft the deposited EP films. The…
Higher order acenes and fused acenes represent two outstanding classes of building blocks to achieve near-infrared absorbing and emitting materials. Appropriate chemical modification and functionalization will lead to significant improvements in solubility and stability, thus making their applications practically poss…
In this study, we have investigated the relationship between aromaticity and photophysical properties of trifluoromethyl-substituted [18]/[20]π porphycenes by using theoretical calculations and various spectroscopic methodologies. Interestingly, we have found that the HOMO-LUMO gap of [20]π porphycene is larger than t…
We investigate graphene transport and structural properties as a function of silicon carbide (SiC) wafer orientation. Terrace step edge density is found to increase with wafer misorientation from SiC(0001). This results in a monotonic increase in average graphene thickness, as well as a 30% increase in carrier density…
Harte Schale …︁ Lebende Hefezellen in einer Siliciumdioxid-Hülle mit Thiol-Funktionen sind durch Polykondensation von Kieselsäure und (3-Mercaptopropyl)trimethoxysilan unter milden Bedingungen erhältlich. Fluoreszenzfarbstoffe (siehe Bild; grün: Fluorescein, rot: Rhodamin), chemische Strukturen oder Proteine können üb…
Experimental and computational results for the electron-deficient porphyrin complex [Fe(NO)(TFPPBr(8))] (1; TFPPBr(8)=2,3,7,8,12,13,17,18-octabromo-5,10,15,20-tetrakis(pentafluorophenyl)porphyrin) are reported with respect to its electron-transfer behavior. Complex 1 undergoes three one-electron processes: two reversi…
Thin transparent SnO(2) films have been surface modified with cationic water-soluble porphyrins for photoelectrochemical investigations. Free-base and zinc(II) derivatives of three types of cationic water-soluble porphyrins, (P)M, viz., tetrakis(N-methylpyridyl)porphyrin chloride, (TMPyP)M, tetrakis(trimethylanilinium…
We report here an atomic resolution study of the structure and composition of the grain boundaries in polycrystallineSr0.6K0.4Fe2As2superconductor. A large fraction of grain boundaries contain amorphous layers larger than the coherence length, while some others contain nanometer-scale crystallites sandwiched in betwee…
The effect of glycerol on the mechanical, thermal and water absorption properties of thermoplastic tapioca starch reinforced rice straw fiber grinded in the range below 100 µm was investigated. Compound formulation was done on twin screw extrusion and the extrudates were pelletized. The compounded samples were process…
Pili pickup sticks: Rodlike type 1 bacterial pili particles (see picture, red) self-assemble into highly ordered nanostructures through molecular recognition in the presence of suitable inducers. 1D bundles, 2D double-layer lattices, and 3D multilayer lattices were produced by varying the nature and concentration of t…
Emerging electrical memory technologies based on phase-change materials capitalize on a fast amorphous-to-crystalline transition. Recent evidence from measurements of relaxation oscillations and switching statistics in phase-change memory devices indicates the possibility that electric field induced crystal nucleation…
High-quality wurtzite MgZnO film was deposited on Si(111) substrate via a delicate interface engineering using BeO, by which solar-blind ultraviolet photodetectors were fabricated on the n-MgZnO(0001)/p-Si(111) heterojunction. A thin Be layer was deposited on clean Si surface with subsequent in situ oxidation processe…
We show that the surface morphology and electrical properties of graphene grown on SiC(0001) wafers depend strongly on miscut angle, even for nominally “on-axis” wafers. Graphene grown on pit-free surfaces with narrow terraces (miscut above 0.28°) shows substantially lower Hall mobility than graphene on surfaces with…
The fabrication of anisotropic nanocomposite exchange-spring magnets is demonstrated experimentally by using a gas-phase nanoparticle deposition technique. High resolution transmission electron microscopy images prove the experimental easy-axis definition of embedded hard magnetic nanoparticles in soft magnetic matrix…
SnO2 semiconductor is a host material for ultraviolet optoelectronic devices applications because of its wide band gap (3.6 eV), large exciton binding energy (130 meV) and exotic electrical properties and has attracted great interests. The renewed interest is fueled by the availability of exciton emission in nanostruc…
We very recently reported a new spectroscopic application for expanding the versatility of surface Raman called "shell-isolated nanoparticle-enhanced Raman spectroscopy" or "SHINERS". The most important and most difficult part of the SHINERS experiment is the effective transfer of the strong electromagnetic field from…
By an organometallic approach based on 1,2,3-triselena[3]ferrocenophane, assembled FeSe 2 nanorods were phase-selectively prepared. Abstraction of the central selenium from 1,2,3-triselena[3]ferrocenophane by reaction with triphenylphosphite resulted in organometallic polymers through Se–Se bond formation. Successive…
Anti-aromaticity: 16π porphyrin metal complexes with nona-, deca-, undeca-, and dodecaalkyl substituents were synthesized. Among the nickel complexes, the 16π 5-butyl octaethylporphyrin (OEP) nickel(II) complex showed the strongest anti-aromaticity, whereas the 16π 5,10,15,20-tetrabutyl OEP nickel(II) complex was the…