Materials Literature
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When a droplet of fluid is deposited on a surface with chemical and/or topological patterns, its static shape is highly dependent on the 2D distribution of the patterns. In the case of chemical stripes, three distinct spreading regimes have been observed as a function of wettability contrast between the two kind of st…
The selective synthesis of tetracoordinate square-planar low-spin nickel(II)-semiquinonato (Ni(II)-SQ) and nickel(III)-catecholato (Ni(III)-Cat) complexes, 1 and 2, respectively, was achieved by using bidentate ligands with modulated nitrogen-donor ability to the nickel ion. The electronic structures of 1 and 2 were r…
SET–DTLRP of VC initiated with CHI3 and catalyzed by Na2S2O4 in water at 21 °C produces ultrahigh molar mass poly(vinyl chloride) (PVC). These PVCs with Mn of 160,000–200,000 have higher glass transition temperature and thermal stability than the highest molecular weight PVC that is commercially available (Mn = 113,00…
Emission properties of Tm3+ in (0.85−x)(Ge0.25As0.10S0.65)–0.15GaS3∕2–xCsBr glass (x=0–0.17) were investigated. With 15mol% CsBr addition, the emission intensity of 1.48-μm increased accompanied by a large increase in the lifetime of the Tm3+:H43 level up to 1.2ms. At the same time, a 1.48-μm emission peak splits into…
We solve the disordered Holstein model in three dimensions considering the phonon variables to be classical. After mapping out the phases of the "clean" strong coupling problem, we focus on the effect of disorder at strong electron-phonon (EP) coupling. The presence of even weak disorder (i) enormously enhances the re…
This paper describes the production of an adaptive composite by embedding thin pre-strained shape memory alloy actuators into a Kevlar-epoxy host material. In order to combine the activation and sensing capabilities, fibre Bragg grating sensors are also embedded into the specimens, and the strain measured in situ duri…
Abstract Summary: A new approach for the production of macroporous polymer materials is presented. Cross‐linked polystyrene particles are first produced by emulsion polymerization. This latex is then swollen by a further addition of monomer and it is successively destabilized, by addition of salt, in such a way that a…
We have observed coherent optical and acoustic phonon generation, which are strongly coupled to the charge-ordering (CO) transition in (, 0.58) using femtosecond optical pump-probe spectroscopy. Coherent optical phonons, observed at low temperatures, disappear above the charge-ordering temperature , while coherent aco…
Simulations of nematic and smectic mesophases based on a dissipative particle dynamics approach are discussed. Mesogenic units are built in the form of standard semirigid bead-spring chains. It is shown that nematic phases can be formed for chains containing at least eight beads, provided that the conservative soft-re…
We study the electron-phonon relaxation (dephasing) rate in disordered semiconductors and low-dimensional structures. The relaxation is determined by the interference of electron scattering via the deformation potential and elastic electron scattering from impurities and defects. We have found that in contrast with th…
Previously, from dielectric relaxation measurements obtained for various temperatures T and pressures P on polypropylene glycol, 1,4-polyisoprene, and poly(oxybutylene) [Roland, C. M.; Casalini, R.; Paluch, M. J. Polym. Sci. Polym. Phys. Ed. 2004, 42, 4313. R. Casalini and C. M. Roland, Macromolecules, 2005, 38, 1779]…
We calculate the morphologies of a number of the observed and hypothetical crystal structures of paracetamol, parabanic acid, and pyridine using the attachment energy model. We also estimate the relative growth volumes of the different polymorphs. This quantity is found to exhibit a large variation, which is generally…
Several ways to synthesize solvated and desolvated calcium tetrahydroaluminate by wet-chemical and mechanochemical methods are presented. The products were characterized by elemental analysis, X-ray diffraction (XRD), and infrared spectroscopy (FTIR). The crystal structure of Ca(AlH(4))(2).4THF was determined. After d…
Substituted phenyl-modified glassy carbon electrodes were functionalized with metal/metal oxide/metal hydroxide and inorganic compounds. More specifically, the glassy carbon electrodes were first functionalized with 4-sulfonate phenyl and N, N -diethylaniline groups by electrochemical reduction of the corresponding di…
We report the synthesis and electropolymerization of a precursor polymer with a binary molecular composition of thiophene and carbazole electroactive groups to form ultrathin films of conjugated polymer networks (CPN) on flat indium tin oxide (ITO) substrates. In the past we have demonstrated the precursor polymer app…
Spherical mesoporous silica particles with entrapped metal nanoparticles are synthesized from a one-step aerosol-assisted self-assembly process using sols of an alkoxysilane, ethanol, surfactant, water, HCl, and metal precursors (e.g., salts or complexes). Utilizing nitrogen as a carrier gas, the sol is sent through a…
We have studied the discrete electronic spectrum of closed metallic nanotube quantum dots. At low temperatures, the stability diagrams show a very regular fourfold pattern that allows for the determination of the electron addition and excitation energies. The measured nanotube spectra are in excellent agreement with t…
Dielectric relaxation time, tau, of ultraviscous bulk water has been determined by analyzing its loss tangent, tan delta, data, which had been measured on heating the vapor-deposited amorphous solid water and hyperquenched glassy water in our earlier studies. [Johari, Hallbrucker, and Mayer, J. Chem. Phys. 95, 2955 (1…
Don't forget to write! Electrochemical charge storage in a ruthenium-based monolayer on a hydrophilic substrate (for example, indium tin oxide coated glass) produces redox switching of the optical properties of the system (see picture). This read/write process can be carried out at low voltage in air and monitored by…
An x-ray photoemission electron microscope using an electron mirror aberration corrector for the study of complex materials, Feng, J, Forest, E, MacDowell, A A, Marcus, M, Padmore, H, Raoux, S, Robin, D, Scholl, A, Schlueter, R, Schmid, P, Stöhr, J, Wan, W, Wei, D H, Wu, Y