Materials Literature
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For the optimization of the surface-mediated photoalignment process of a poly(di- n -hexylsilane) (PDHS) film, a systematic investigation was conducted with respect to the design of the surface azobenzene (Az) monolayer. The preparative conditions and synthetic design of the Az monolayer were investigated in terms of…
The Yb 3+ -doped non-linear rare-earth calcium oxoborate crystals GdCa 4 O (BO 3 ) 3 (GdCOB) and YCa 4 O(BO 3 ) 3 (YCOB) were investigated by low-temperature absorption and selective excitation spectroscopy. The selective excitation and emission spectra revealed the spectral features of the main Yb 3+ centre and the p…
Abstract The mechanical properties of thermoplastic starch (TPS) and poly(hydroxy ester ether) (PHEE) blends were studied as a function of the starch concentration. The moisture level present during processing significantly affects the morphology. A dispersed droplet morphology was observed even at very high starch le…
Recent experiments indicate that doping low concentrations of bent-core molecules into calamitic smectic solvents can induce anticlinic and biaxial smectic phases. We have carried out Monte Carlo simulations of mixtures of rodlike molecules (hard spherocylinders with length/breadth ratio ${L}_{\mathrm{rod}}/D\phantom{…
A series of Ni(OH) 2 −manganese oxide (NMO) compounds with a mixed layered structure were synthesized by inserting nickel hydroxide into layered manganese oxides, Na−birnessite (NaBir) and Ni−birnessite (NiBir), under hydrothermal conditions. The hydrothermal intercalation reaction and the NMO compounds were investiga…
Frechet-type polyether dendrons bearing COOH groups at the focal points have been grafted onto nanometre silica premodified with 3-aminopropyltriethoxysilane by N,N′-dicyclohexylcarbodiimide mediated amidation. The dendron grafted silicas have been characterized by FTIR spectroscopy, elemental analysis and thermogravi…
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Abstract The flame retardant effect of zinc sulphide (ZnS) in plasticised poly(vinyl chloride) (PVC‐P) materials was investigated. PVC‐P containing different combinations of additives such as 5% ZnS, 5% of antimony oxide (Sb 2 O 3 ) and 5% of mixtures based on Sb 2 O 3 and ZnS were compared. The thermal degradation an…
Abstract Novel natural clay–polymer hybrid materials are prepared from natural bentonite that was modified with silane‐coupling agent, γ‐methacryloxypropyltrimethoxysilane (A‐174), and acrylonitrile. By changing the molar ratio of acrylonitrile in the initial monomer feed, several clay–hybrid materials were prepared.…
Several tetraalkylammonium pentaorganosilicates, derived from 9,9-spirobi(9H,9-silafluorene) were prepared from the corresponding lithium silicates and isolated and characterized as storable high melting solids.
The monomer and dimer structures of cyclo[(− l -Phe 1 - d -Ala 2 ) n −] and cyclo[(− l -Phe 1 - d - Me N -Ala 2 ) n −] ( n = 3−6) were studied by using the semiempirical molecular orbital AM1 method and the density functional B3LYP method. The structural characteristics of these molecules were revealed, some of which…
We consider the statics of compound droplets made of two immiscible fluids on a rigid substrate, in the limit when gravity is dominated by capillarity. In particular, we show that the merging of four phases along a single contact line is a persistent and robust phenomenon from a mechanical and thermodynamic perspectiv…
By exploiting the self-organization of metal salt-loaded diblock copolymer micelles followed by a plasma-induced removal of the polymer matrix, well-separated gold particles ranging in size from 1.6 to 10 nm have been prepared on top of diamond substrates. X-ray-induced photoelectron spectra of the valence-band region…
We present a quantum mechanical study of carbamoylphosphine oxide (CMPO) complexes of MX(3) (M(3+) = La(3+), Eu(3+), Yb(3+); X(-) = Cl(-), NO(3)(-)) with a systematic comparison of monodentate vs bidentate binding modes of CMPO. The per ligand interaction energies Delta E increase from La(3+) to Yb(3+) and are higher…
New porphyrin assemblies containing 17 porphyrin molecules are constructed by using free base TPP-type porphyrins having eight pyrazine moieties 1. Spectroscopic titration of dimeric [meso-tetrakis(2-carboxy-4-nonylphenyl)porphyrinato]zinc(II) 2 with these porphyrins shows that the processes of the formation of the he…
Surface-stabilized ferroelectric liquid crystal cells are usually bistable, with the spontaneous polarization either up or down, perpendicular to the plane of the cell. In materials with high spontaneous polarization the polarization charge self-interaction leads to a monostable structure that exhibits a thresholdless…
Abstract The synthesis of 3,4‐ethylenedioxythiophene (EDOT) derivatives bearing functional groups is described. Their electrochemical characteristics were investigated with cyclic voltammetry and ultraviolet–visible spectroscopy. Various copolymers of EDOT and modified EDOT containing hydroxyl groups were electrochemi…
Local structural arrangements and corresponding dynamical effects in relaxor ferroelectrics PbSc 1/2 Nb 1/2 O 3 and PbSc 1/2 Ta 1/2 O 3 were studied by Raman spectroscopy. Polarized Raman spectra of single crystals were measured at different temperatures in several scattering configurations. The peaks observed are ass…
We characterized the energy band dispersion near the Fermi level in single-walled carbon nanotubes using low-temperature scanning tunneling microscopy. Analysis of energy-dependent standing wave oscillations, which result from quantum interference of electrons resonantly scattered by defects, yields a linear energy di…
We describe a new chiral tubule-forming lipid in which the C-O-P phosphoryl linkage of the archetypal tubule-forming molecule, 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine, "DC(8,9)PC", is replaced by a C-P linkage. Tubule formation with this phosphonate analogue proceeds under the same mild conditions as…