Materials Literature
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Abstract Join the family : Nanographene and nanodiamond are new members of nanocarbons, which consist of nano‐sized hexagonal and tetrahedral networks, respectively. In contrast to other members of the nanocarbon family, such as fullerenes and carbon nanotubes, the edge or surface in nanographene or nonodiamond plays…
Mixed doubles: The dimeric complex [{Fe(tim)}(2)] (see structure, tim = 2,3,9,10-tetramethyl-1,4,8,11-tetraazacyclotetradeca-1,3,8,10-tetraene) represents an unprecedented complex containing an unsupported Fe-Fe bond. The crystal structure confirms the presence of reduced tim units, thus indicating ligand redox activi…
A number of bacterial collagen-like proteins with Gly as every third residue and a high Pro content have been observed to form stable triple-helical structures despite the absence of hydroxyproline (Hyp). Here, the high yield cold-shock expression system is used to obtain purified recombinant collagen-like protein (V-…
The ultimate miniaturization of electronic devices will likely require local and coherent control of single electronic wavefunctions. Wavefunctions exist within both physical real space and an abstract state space with a simple geometric interpretation: this state space--or Hilbert space--is spanned by mutually orthog…
We report a detailed examination the magnetic structure of anhydrous cupric chloride CuCl2 carried out by powder neutron diffraction, magnetic susceptibility and specific heat measurements on polycrystalline and single crystal samples as well as an evaluation of the spin exchange interactions by first principles densi…
The high temperature decomposition of three types of hydrocarbons, such as ethanol, camphor and cyclohexanol has been studied in order to determine the role played by the molecular structure of the precursor during the formation of carbon nanotubes (CNTs) catalyzed by ferrocene. This investigation will help in identif…
In this paper, microstructures of ceria powder, synthesized using spray pyrolysis method, were characterized by focused ion beam technique and transmission electron microscopy. Dependence of the shape of powder particle on the size was found. It appears a spherical shape with the diameter less than approximately 500 n…
The shape of CNTs is affected by various growth parameters such as reaction time, temperature, working power, and pressure as well as the type of catalytic layer and synthesis method. In this work, the thickness of Ni catalyst layer was varied to control the diameter of synthesized CNT. Ni catalyst layer was prepared…
Methods for the development of bifunctional magnetic and optically tunable nanoparticles with a structural design involving a magnetic iron oxide core (Fe3O4/gamma-Fe2O3) surrounded by a thick silica shell and further covered with an outer shell of optically active nanoparticles (CdTe quantum dots or gold nanoparticle…
Nano-thick siloxane coatings with thickness in the range 1-33 nm were deposited using a reel-to-reel atmospheric plasma coating system. The coatings were deposited from a tetraethoxysilane (TEOS) precursor which was nebulised into a helium plasma. An issue influencing coating performance is the incorporation of partic…
In order to develop nanocomposite solid oxide fuel cells (NANOCOFCs) at the range of intermediate temperature (500-700 degrees C), the new cathode materials LaNi0.2Fe0.8-xCuxO3 (x = 0.0-0.2) (LNFCu) powders were prepared using coprecipitation method. It was found that the orthorhombic structure could be formed after b…
We studied a possibility of destabilization of MgH2 by chemical reaction with Si by using a nano-engineering method for reducing diffusion distances and increasing surface area. The structure, morphology, chemical composition and dehydriding properties were investigated by XRD, SEM, EDS, DTA-TG and the volumetric Siev…
Abstract We report here an unprecedented utility of redox-active transition-metal complexes as heat-shielding materials. A poly(vinyl alcohol) film containing mixed-valent cluster [Ru3(μ3-O)(μ-CH3CO2)6(mbpy+)3](PF6)3 (1) (mbpy+ = 1-methyl-4,4′-bipyridinium cation), which strongly absorbs light in the near-infrared reg…
Nanocrystalline diamond (NCD) coatings offer an excellent alternative for tribological applications, preserving most of the intrinsic mechanical properties of polycrystalline CVD diamond and adding to it an extreme surface smoothness. Silicon nitride (Si3N4) ceramics are reported to guarantee high adhesion levels to C…
In this work, we perform a comparative study on single-walled carbon nanotubes (CNT) before and after low energy nitrogen ion bombardment (70 eV and 25 x 10-6 A/cm2) at room temperature. The morphology and the mechanical properties were studied by Atomic Force Microscopy (AFM). The bonding configuration of the N-doped…
Zn1-xMgxO p-n photodiodes were fabricated on (0001) sapphire substrates using a pulsed laser deposition technique with different Mg contents. Ti-Au and Ni-Au metals deposited using vacuum evaporation were used as n-type and p-type contacts, respectively. The X-ray diffraction analysis showed the Zn1-xMgxO double layer…
Dramatic changes in wettability of diamond and graphite are observed when these materials are prepared in nanostructured forms--undoped and nitrogen-doped ultrananocrystalline diamond (UNCD) films, and graphite nanowalls (GNW), respectively. The nanostructured carbon films were deposited on Si by microwave plasma CVD…
Nanocrystalline CaFe2O4 oxide semiconductor with spinel structure was synthesized by polymerized complex (PC) method and investigated for its physical and optical properties. The crystallization of CaFe2O4 made by PC method was found to occur in the temperature range of 700-1100 degrees C. The observation of highly pu…
Single crystal strontium and barium hexaferrites in which Al is substituted for Fe have uniaxial anisotropy fields on the order of 20-30 kOe and have magnetic excitations at 75-110 GHz. Here, we discuss results of investigations on magnetostatic forward volume waves and dielectric resonances in such ferrites. Data on…
A hybrid solid oxide fuel cell and gas turbine (SOFC/GT) system exploits the complementary features of the two power plants, where the GT recuperates the energy in the SOFC exhaust stream and thereby boosting the overall system efficiency. Through model based transient analysis, however, it is shown that the intricate…