Materials Literature
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In the United States there are several thousand devices containing high-activity radiation sources licensed for use in areas ranging from medical uses such as cancer therapy to safety uses such as testing of structures and industrial equipment. Those radiation sources are licensed by the U.S. Nuclear Regulatory Commis…
We investigate cyclotron motion in graphene monolayers considering both the full quantum dynamics and its semiclassical limit reached at high carrier energies. Effects of zitterbewegung due to the two dispersion branches of the spectrum dominate the irregular quantum motion at low energies and are obtained as a system…
Three discrete cobalt-substituted silicotungstates, [Co3(H2O)(B-beta-SiW9O34)(B-beta-SiW8O29(OH)2)]12- (1), [Co3(H2O)(B-alpha-SiW9O34)(B-beta-SiW8O31)]14- (2), and [Co9Cl2(OH)3(H2O)9(B-beta-SiW8O31)3]17- (3), have been synthesized using a synthetic approach involving Co(II) ions, the dilacunary [gamma-SiW10O36]8- poly…
A series of biaxial V-shaped, shape-persistent molecules has been synthesised by stepwise coupling of phenylene ethynylene arms to an oxadiazole bending unit. Studies of their thermotropic nematic phases point to phase biaxiality.
The study describes the solid state behaviour, and the thermal and structural features of four monosolvates of cinacalcet hydrochloride with acetic acid, chloroform, 1,4-dioxane, and tetrachloromethane, and summarises the transformation and production pathways of the seven crystal forms of this promising drug compound…
Over the past decades, organic solar cells based on semiconducting polymers or small molecules have become a promising alternative to traditional inorganic photovoltaic devices. However, to address the intrinsic limitations of organic materials, such as charge separation yield, charge transport and durability, new str…
CoFe(2)O(4) nanorings were synthesized by a simple solvothermal process, in which Ostwald ripening was definitely responsible for the formation of hollow structures, and their ferromagnetic behavior at room temperature was observed.
The molecular weights and hydrodynamic radii of three different supramolecular assemblies formed by coordination of zinc-porphyrins with DABCO are estimated by means of 1H NMR diffusion-ordered spectroscopy (DOSY) confirming their stoichiometries and sandwich-like structure already derived from 1H NMR and UV/Vis titra…
Coating growth on WE43-T6 magnesium alloy during direct current plasma electrolytic oxidation is investigated in alkaline phosphate and silicate electrolytes. The study employs sequential treatments in the two electrolytes, followed by analyses of the coatings and the electrolytes. The coatings comprise mainly an oute…
Double-layer capacitor electrolytes employing 1,3-dioxolane as a cosolvent with acetonitrile have been evaluated in coin cells using electrochemical impedance spectroscopy and dc charging and discharging tests. Addition of the lower-melting-point 1,3-dioxolane to the standard acetonitrile solvent was found to extend t…
The phase constitutions of Mg-Zn-Gd alloys in the Mg-rich corner were investigated using XRD, SEM and TEM. The effect of Zn/Gd ratio and content of Zn, Gd element on the phase constitutions of Mg-Zn-Gd alloys were studied. Formation range of I-phase in the Mg-Zn-Gd system in the Mg-rich corner has been confirmed using…
Hierarchical anisotropic structures ranging from triangular 'platelets' to nanofibres of Cd(OH)2 are synthesized at a water-toluene interface; the nanowires are used as sacrificial templates to produce CdO wires and CdS nanostructures, preserving many structural aspects.
Six kinds of Mg-2.5 at%Zn-0.5 at%RE (RE: rare earth element, Y, Gd, Tb, Dy, Ho and Er) alloys with grain size of 1∼2 μm and containing a quasicrystalline icosahedral phase were prepared by casting and extrusion. These alloys had high strength and high fracture toughness balances, due to the synergetic effect of grain…
We report here on the systematic synthesis of three nanopowder series along the NiO–Co3O4, NiO–MoO3, and NiO–CuO tie lines. Sixteen individual samples were produced via liquid-feed flame spray pyrolysis (LF-FSP) and analyzed by SSA, SEM, EDX, FTIR, TGA-DTA, and XRD. The LF-FSP process is a general aerosol combustion s…
The first systematic investigations on the optical properties of mesoporous silica-based organic–inorganic hybrid materials is reported. It could be shown that the optical absorption properties of the incorporated organic functionalities are tuneable by adjusting the length of the conjugation of the π-electron systems…
Thermoset thin films via directed self-assembly, where benzocyclobutene (BCB) groups are incorporated selectively into the one block, have been prepared from cross-linkable block copolymers in a simple process, which allows size controllability and the registration of oriented microdomains in multi-layer applications.
The reactions of boron halides with free base porphyrins under conditions where partial hydrolysis of the boron halides can occur give diboron porphyrin complexes containing BOB moieties in which each boron is bonded to two porphyrin nitrogen atoms. BF(3).OEt(2) with H(2)(por) gives B(2)OF(2)(por) (por = tpp, ttp, tpC…
A long, two-electron ten-center (2e(-)/10c) [8 carbon plus 2 oxygen] bond in diamagnetic dimers of radical-anion tetracyano-1,4-benzoquinoneide (cyanil, [Q] (-)), [Q](2)(2-), is described by B3LYP and CASSCF(2,2)/MCQDPT calculations.
Stable colloidal suspensions of ordered mesostructured silica have been prepared in a concentrated reaction solution under mild acidic conditions using an inorganic silica source and Pluronic P123. This synthesis method results in a high yield, and it is also suitable for studies of formation and growth mechanisms of…
A resist-less nanofabrication method, based on focused ion beam lithography, for connecting and tailoring a nanometer-scale planar device in ultrathin graphitic disks is demonstrated by producing 50-nm-wide double side-gated transistor devices (see image). Experiments and theory suggest that the behavior of the nanori…