Materials Literature
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The CeIII, PrIII, NdIII, GdIII and YbIII complexes of the heptadentate ligand 2,2´,2´´-tris(salicylideneimino) triethylamine, H3trensal (in its trianionic form), have been synthesized and characterized structurally by X-ray crystallography. These five [Ln(trensal)] structures complete a rare isomorphous and isostructu…
The clean Cu/diamond(111) work of separation is found to be $1.30\mathrm{J}/{\mathrm{m}}^{2}$. Copper $d$ and diamond $p$ states play a significant role in forming relatively strong Cu/diamond interfacial bonds, while reconstruction of the free diamond(111) surface lowers the work of separation. The single dangling bo…
The influence of the addition of small quantities of anisotropic layered silicates on the ordering of block copolymers is studied by a combination of linear viscoelasticity and small angle neutron scattering. Specifically, we examine the influence of varying the lateral dimensions of thermodynamically roughly equivale…
Recent experiments on mixtures of rodlike and platelike colloidal particles have uncovered the phase behavior of strongly asymmetrical rod-plate mixtures. In these mixtures, in which the excluded volume of the platelets is much larger than that of the rods, an extended isotropic (I)–plate-rich nematic (N−)–rod-rich ne…
AgInSbTe films have recently attracted considerable interest as advanced materials for phase change recording. For this application the determination of crystallization kinetics is of crucial importance. In this work the temperature dependence of structural and electrical properties of sputtered AgInSbTe films has bee…
We address several general questions about quantum transport through molecular systems by an ab initio analysis of a scandium-nitrogen doped ${C}_{80}$ metallofullerene device. Charge transfer from the ${\mathrm{Sc}}_{3}\mathrm{N}$ is found to drastically change the current-voltage characteristics: the current through…
We investigate physical properties of polymer dispersed liquid crystal transmission gratings which influence the light diffraction efficiency behavior. Scanning electron microscopy is used to determine the orientation and shape of nanometer-sized liquid crystal droplets in a polymer host. Dependence of diffraction eff…
Sticklike silicate materials containing aligned nanodomains of conjugated polymers were synthesized by sol-gel-based in situ polymerization of ammonium ion terminated diacetylenic surfactant monomers. Upon photoexcitation at 450 nm, the silicate microsticks emit a yellowish green luminescence centered at 550 nm.
The structural relaxation kinetics in the glass transition for xSb2O3⋅(100−x)B2O3 glasses with covalent bonding character has been examined from viscosity and heat capacity measurements. These binary glasses have low glass transition temperatures, Tg=250–290 °C, but show a high thermal resistance against crystallizati…
Koordinierte Wassermoleküle induzieren die Aggregation und Selbstorganisation einer lyotropen flüssigkristallinen Phase, die aus nichtionischen Tensiden CnH2n+1(CH2CH2O)mOH und Übergangsmetall-Wasser-Komplexen ([Ni(H2O)6](NO3)2, [Co(H2O)6](NO3)2, [Zn(H2O)6](NO3)2, [Cd(H2O)4](NO3)2 und [Co(H2O)6]Cl2) gebildet wird, sod…
The thermal conductance of mechanically suspended nanostructures has recently received much attention, in part due to the recent prediction and observation of the quantum limit for thermal conductance, which is observed in long, thin insulating beams at very low temperatures [D. E. Angelescu, M. C. Cross, and M. L. Ro…
The influence of a highly anisotropic layered silicate (organically modified montmorillonite) in directing the mesoscopic self-assembly of a block copolymer blend is studied as a model for the development and tailoring of templated inorganic–organic hybrid materials. The potential for nanometer thick layers to induce…
Uniformly dispersed zinc ferrite nanoparticles were successfully synthesized in a silica matrix with both the magnetic properties and optical transparency designed in the visible wavelength region. The phases and morphologies of these zinc ferrite particles were examined using x-ray diffraction, Raman spectroscopy and…
Brillouin light scattering, Raman light scattering and x-ray diffraction were used to investigate the elastic and microstructural properties of polycrystalline and smooth fine-grained diamond films of varying diamond quality. They were deposited on a titanium alloy by a two-step microwave plasma-assisted chemical vapo…
Decay rates and related transport coefficients of hydrodynamic disturbances in the isothermal dissipative particle dynamics (DPD) fluid depend strongly on how the probing wave length (in simulations: sizes of colloidal particles, polymers, pores, etc.) compares to the dynamic correlation length and to the range of the…
Chemical and thermal reduction of copper oxide thin films (∼20 Å) has been studied with x-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (TPD) for application in microelectronic device interconnects. XPS showed that copper (I) oxide (Cu2O) and copper (II) oxide (CuO) were reduced to copper…
Ferroelectric twin-domain structures in epitaxial Pb(Zr, Ti)O3 (PZT) thin films grown on various single-crystal substrates such as MgO(001), KTaO3(001), and SrTiO3(001) were investigated by two-dimensional reciprocal space mapping using synchrotron x-ray diffraction. Each system showed a characteristic domain structur…
New analogues of calix[4]arenetetrasulfonate (1) were prepared, in which the methylene bridges are replaced by S (2) and SO2 (3). The complexation ability of these calixarene ligands 1–3 toward Tb3+ ion and luminescence properties of the resulting complexes were examined. All the ligands formed complexes with lanthani…
Co-doped ZnO(Zn1−xCoxO) and Co, Al codoped ZnO(Zn1−xCoxO:Al) films were grown on c-plane sapphire (0001) substrates by pulsed laser deposition using a KrF excimer laser. In order to enhance homogeneous substitution of Co2+ for Zn2+ in the ZnO film, an alternating deposition (AD) method was employed for doping. ZnO fil…
First-principles total energy calculations are performed to study the phase stability of BN and C at low temperature. These are done using density functional theory (DFT) within the local density approximation (LDA) and the generalized gradient approximation (GGA). We find that for both materials LDA calculations pred…