Materials Literature
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A simple organic-free replacement process was realized between an aqueous silver nitrate solution and an aluminum wafer, in the presence of a polyoxometalate (POM), [PW 12 O 40 ] 3– (PW12). The same protocol was used with a carbon-coated copper grid and a silicon wafer. The POM was photochemically reduced and used as…
BACKGROUND: The development of water-soluble nanodevices extends the potential use of compounds developed for other purposes (e.g. antifungal drugs or antibiotics) for applications in agriculture. For example, the broad-spectrum, water-insoluble, macrolide polyene antibiotic amphotericin B (AMB) could be used to inhib…
Nanostructures of crystalline orthorhombic sodium niobate ( NaNbO 3 ) were synthesized by a molten salt synthesis procedure. As a comparison, an auxiliary experiment via conventional solid state reaction process was carried out simultaneously. The microstructure and morphology evolution of the synthesized nano particl…
We use Brownian dynamics computer simulations of a moderately dense colloidal system undergoing steady shear flow to investigate the uniqueness of the so-called effective temperature. We compare effective temperatures calculated from the fluctuation-dissipation ratios and from the linear response to a static, long-wav…
Pb x Sr 1‐x TiO 3 ( PST ) thin films with the ratio Pb/Sr = 40/60 were deposited on silicon substrate with Pt or LaNiO 3 ( LNO ) bottom electrodes by radio frequency magnetron sputtering followed by a postannealing treatment. The structural and microstructural analyses were performed and a perovskite phase was obtaine…
Three‐dimensional electron backscatter diffraction was used to measure the crystallographic distribution of the electrochemically relevant triple phase boundary lines and surfaces near them in SOFC cathodes made up of a porous mixture of yttria‐stabilized zirconia and lanthanum strontium manganese oxide, both before a…
Yttrium tetraboride was synthesized by reactions of Y 2 O 3 with B 4 C or with a B 4 C/C mixture. Fully dense YB 4 ceramics were prepared by hot‐pressing at 1800°C and 20 MPa in He . The flexural strength and microhardness of the YB 4 were about 300 MPa and 27 GPa, respectively. Pure YB 4 showed considerable oxidation…
We investigate the effect of periodic potentials on the electronic structure of bilayer graphene and show that there is a critical value of the external potential below which new Dirac fermions are generated in the low-energy band structure, and above which a band gap is opened in the system. Our results, obtained fro…
Graphene oxide (GO) is a promising candidate for many applications ranging from electronics to sensors. The properties of graphene-based materials not only are dependent on the quality of the sheets but are largely influenced by the way they are assembled. Many techniques have traditionally been used to form GO films,…
Novel selectively edge grown ZnO–carbon nanotube (CNT) heterostructure field emission (FE) arrays have been fabricated by a facile and repeatable two-step process. First, with the combined effect from a ZnO seed layer and a passivation layer for nanorod growth, ZnO nanorods could only grow on the edge of a 4 μm diamet…
Photoinduced electron transfer (PET) of a hybrid system comprising N, N ′-ditridecylperylenediimide (LPDI), which forms nanobelt structures of the form (LPDI) n, and soluble zinc (tetra- tert -butyl)phthalocyanine (ZnTBPc) has been investigated in polar benzonitrile. The PET of a mixture system comprising N, N ′-dihep…
Abstract Ferromagnetic metallic glasses (FMG) show a very special combination of magnetic, elastic, and magnetostrictive properties that have rocketed their most extended technological applications, mainly in the field of sensors and surveillance labels. The amorphous structure results in the cancellation of the magne…
We use neutron scattering to determine spin excitations in single crystals of nonsuperconducting Li${}_{1\ensuremath{-}x}$FeAs throughout the Brillouin zone. Although angle resolved photoemission experiments and local density approximation calculations suggest poor Fermi surface nesting conditions for antiferromagneti…
Nickel N-confused tetraphenylporphyrin, 1, and nickel 2-N-methyl-N-confused tetraphenylporphyrin, 1-Me, exhibit unusual sign-reversed (positive-to-negative intensities in ascending energy) MCD spectra in the Q-type band region, suggesting a rare ΔHOMO < ΔLUMO relationship between π and π* MOs in the porphyrin core. Si…
Abstract Weatherable semicrystalline polyesters based on 1,4‐cyclohexanedimethanol, 1,4‐cyclohexanedicarboxylic acid (CHDA) or dimethyl 1,4‐cyclohexane dicarboxylate (DMCD) can be prepared under normal melt‐phase conditions, using titanium tetrabutoxide as catalyst. The effect of monomer ratio, reaction temperature an…
Using electrostatic force microscopy, we show direct evidence of charge injection at the carbon nanotube–SiO 2 interface leading to the appearance of hysteresis. The dynamic screening effect of the injected charges is revealed step by step. Further temperature dependent tests also demonstrate the effect of SiO 2 surfa…
To build our economy on a sustainable basis, we need to find a replacement for fossil carbon as chemical industry feedstocks (Andrady and Neal, 2009). There are growing concerns about current petroleum based production, accumulation of waste in landfills and in natural habitats including the sea, physical problems for…
Multiple CdSe and ZnSe semiconductor shells were grown on PbSe semiconductor spherical cores with monolayer control. For CdSe shell coating, we found that there was little room to further increase the quantum yields of freshly-made high-quality PbSe nanocrystals that already owned very high initial values because of t…
Abstract In this article we review the exotic magnetism of nanoparticles (NPs) formed by substances that are not magnetic in bulk as described with generality in Section 1 . In particular, the intrinsic character of the magnetism observed on capped Au and ZnO NPs is analysed. X‐ray magnetic circular dichroism (XMCD) a…
An increasing number of reports on the syntheses of carbohydrate- and plant oil-based polymers has been published in ongoing efforts to produce plastic materials from renewable resources. Although many of these polymers are biodegradable and this is a desirable property for certain applications, in some cases non-degr…