Materials Literature
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We present new time-resolved powder diffraction data measured in situ during the hydrothermal crystallisation of two families of crystalline inorganic materials. In the first study, we have used time-resolved energy-dispersive X-ray diffraction (EDXRD) to follow the formation of zeolitic zinc phosphates from amine pho…
A method for the processing of an individual nanotube, which is based on the thermally assisted field evaporation process, has been performed using a nanomanipulator installed in a scanning electron microscope. One nanotube is placed opposite another at a distance of about one micrometer and voltage is applied between…
A new nanocomposite was synthesized by reacting the layered double hydroxide Al 0.33 Mg 0.67 (OH) 2 (C 12 H 25 SO 4 ) 0.33 ·0.64H 2 O with poly(ethylene oxide). The composite was characterized with X-ray powder diffraction, thermal analysis (simultaneous thermogravimetric analysis/differential scanning calorimetry), F…
Micropatterning of anatase TiO2 thin films by site-selective immersion was realized using a self-assembled monolayer (SAM) which has a pattern of hydrophilic and hydrophobic surfaces. A solution containing a Ti precursor contacted the hydrophilic surface during the experiment and briefly came into contact with the hyd…
Abstract We studied the crosslinking of conventional nitrile rubber with metal peroxide at varying temperatures. Crosslink density, measured by swelling in the solvent until equilibrium, and the reaction rate increased with temperature, suggesting that crosslinking is a function of peroxide decomposition. At a specifi…
Self-assembly between the building blocks [M2(mu-dppm)2(MeCN)2]2+ (M = Cu or Ag; dppm = bis(diphenylphosphino)methane) and M'(aet)2 (aet = 2-aminoethanethiolate) afforded luminescent heterohepta-nuclear complexes [Cu4M'3(mu-dppm)3(mu 3-aet)4(mu-aet)2]4+ (M' = Ni 1; Pd 2) or heterotrinuclear complexes [Ag2M'(mu-dppm)2(…
Cd-rich CdSe nanocrystals below a critical size, under illumination, catalyze CO2 fixation, but bulk CdSe surfaces do not. We report first-principles calculations in which we determine the roles of faceting, deviations from stoichiometry, photoexcitation, and electron confinement, and the specific physics of the nanos…
The character of the ground and optically excited states was investigated by quantum chemical calculations. We propose a rung ground state with V 3d(1)(xy)-O 2p(1)(y)-V 3d(1)(xy) character, instead of the conventional picture of one unpaired electron shared by 2 V ions. The unpaired electron on O is low-spin coupled t…
The temperature dependence of water equivalent phantom materials used in radiotherapy and diagnostic imaging has been investigated. Samples of phantom materials based on epoxy resin, polyethylene, a polystyrene-polypropylene mixture and commercially available phantom materials (Solid Water, Gammex RMI and Plastic Wate…
A phenol-based "end-off" compartmental ligand, 2-[N-[2-(dimethylamino)ethyl]iminomethyl]-6-[N,N-di(2-pyridylmethyl)aminomethyl]-4-methylphenol (HL), having a bidentate arm and a tridentate arm attached to the 2 and 6 positions of the phenolic ring, has afforded the following heterodinuclear M(a)(II)M(b)(II) complexes:…
Abstract Aging experiments, with a special emphasis on the atmosphere effect, have been carried out on undoped polyaniline, in its half‐oxidized state, namely emeraldine base (EB). The polymer has been aged under vacuum and in air atmosphere. The chemical degradation has been analyzed by several complementary techniqu…
Abstract Solubility of carbon dioxide (CO 2 ) in a low‐density polyethylene (LDPE)/titanium dioxide (TiO 2 ) composite was measured using a magnetic suspension balance (MSB) at a temperature from 423 to 473 K and pressures up to 15 MPa. The effect of the TiO 2 concentration on the solubility is investigated by varying…
Citrate-stabilized CdSe or CdSe/CdS core−shell nanoparticles (NPs) were adsorbed on the standard silicon wafers bearing either a short-chain covalently bound adsorption promoter (3-aminopropyl)triethoxylsilane (APTES) or macromolecular adsorption promoters polyethylenimine (PEI) or poly(diallydimethylammonium) chlorid…
The structure of LiTaOGeO(4) has been refined using X-ray diffraction data collected at 293 K and at 173 K. The low-temperature structure is isostructural with LiTaOSiO(4) and closely related to the low-temperature structure of titanite, CaTiOSiO(4). Li occurs in a distorted tetrahedral coordination. The transition to…
Neutron-diffraction studies of the compounds 5-nitro-2-[[1-phenylethyl]amino]pyridine (methylbenzylaminonitropyridine, hereafter MBANP) and 3,5-dinitro-2-[[1-phenylethyl]amino]pyridine (methylbenzylaminodinitropyridine, hereafter MBADNP) are presented, and a charge-density study of the latter is reported. The studies…
A new phase of dicalcium silicate (Ca(2)SiO(4)) was formed by heating alpha-dicalcium silicate hydrate [alpha-Ca(2)(SiO(4)H)OH = alpha-C(2)SH] at temperatures of approximately 663-763 K, and it was transformed into alpha(L)'-Ca(2)SiO(4) (= alpha(L)'-C(2)S) above approximately 1193 K. The crystal structure of the new p…
One of the challenges in water supply is the removal of humic substances as the unit treatment processes in a conventional water treatment plant are usually not effective for this purpose. In this study, nylon 6,6 granules were surface-modified by chemical polymerization of pyrrole and were used as a granular adsorben…
Partially fluorinated isocyanates were synthesized from hexamethylene diisocyanate (HDI) and an HDI trimer (Desmodur N3300). The perfluoroalkyl group (R f ) was C 6 F 13 or C 8 F 17, and the ratio between R f and the isocyanate group (NCO) was 1/99 in the case of HDI or 1/49 in the case of N3300. Polymeric films with…
The crystal structure of alpha-glycine has been investigated in the temperature range 288-427 K using neutron diffraction. The molecular structure does not change significantly and the putative crystallographic phase transition associated with anomalous electrical behaviour in this temperature range is not observed. T…
Normal and reverse micelle microemulsion methods were used to synthesis single-phase CoCrFeO 4 nanoparticles with a controlled size range of 6−16 nm and a size distribution of 14%. The size-dependent magnetic properties were characterized and found to agree well with Stoner−Wohlfarth theory. The results from nanoparti…