Materials Literature
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Regular square FeSex nanoflakes with tetragonal PbO-type phase and selenium deficiency have been grown from an inorganic iron source, i.e. ferrous chloride and selenium trioctylphosphine through a simple solution-based route in the co-solvent of oleylamine and oleic acid. The phase and structure are identified by powd…
A planar poly(acrylic acid) (PAA) brush provides an unusual substrate for the unspecific immobilization of proteins on material surfaces. At neutral pH-values, proteins adsorb at a PAA brush when the ionic strength of the protein solution is low. In contrast, raising the ionic strength to a few 100 mM transforms a PAA…
Ab initio calculations show that a possible mechanism for the photomagnetism in copper octacyanomolybdate compounds consists of the initial excitation of the diamagnetic Cu(II)-Mo(IV-CS) pair to a Cu(II)-Mo(IV-T) state, whose geometry relaxation stabilizes the magnetic doublet and quartet states.
Benzotriazole an organic compounds has been studied as corrosion inhibition for mild steel in 1 N citric acid by weight loss method. The result showed that the corrosion inhibition efficiency of the compound was found to be varying with the temperature and acid concentration. Also it was found that the corrosion inhib…
Self-assembly of simple glycyl–glycine-containing peptide lipids, both in water and alcohol, gave various organic nanotubes covered with different functional surfaces in a facile production manner. Especially, the self-assembly in alcohol media increased the yield of nanotube by more than 5 times and decreased the pro…
The decomposition of iridium acetylacetonate Ir(acac)(3) impregnated on amorphous silica-alumina (ASA) has been investigated by combined thermogravimetry-differential thermal analysis-mass spectrometry (TG-DTA-MS) and by in situ X-ray diffraction (XRD). The resulting Ir/ASA hydrotreating catalysts have also been chara…
Magnesium represents a very attractive material for biodegradable stents since the process of its natural and gradual dissolution into the human body by a corrosion process would prevent restenosis risks and would allow the progressive transmission of the mechanical load to the surrounding tissues after several months…
The newly introduced ORION™ helium ion microscope has been used for high resolution imaging and nanofabrication. More recently, an energy sensitive detector has been developed that permits the measurement of the energy spectrum of the backscattered helium ions. The spectra can be analyzed directly or compared with the…
We have studied the influence of the seed layer on the growth of ZnO nanorods on GaN by vapor deposition and the performance of the p-GaN/ZnO nanorod light emitting diodes (LEDs). The seed layer had a significant influence on the orientation and density of the ZnO nanorods as well as on the current–voltage curves of t…
The photocatalyst was prepared from indium hydroxide calcined at for 3 h. The p-n heterojunction photocatalyst was prepared by ballmilling through doping into and using absolute alcohol as a disperser. The photocatalyst was characterized by X-ray powder diffraction, UV-visible diffuse reflectance spectroscopy, X-ray p…
Corresponding author: yasemincaglar@anadolu.edu.tr, ycaglar@semiconductorslab.comThe undoped and tin (Sn) doped ZnO films were deposited by a spray pyrolysis method ontothe glass substrates. 0.2 M solution of zinc acetate in a mixture of ethanol and deionised water, ina volume proportion of 3:1, was employed. Dopant s…
Abstract In the past, TiO
Time-of-flight neutron powder diffraction (TOF-NPD) and synchrotron X-ray powder diffraction (SXPD) experiments were carried out to study the crystal structure of 7 Li isotope enriched 7 Li 7 P 3 S 11 glass ceramics, which is a lithium superionic conductor. Combined X-ray/neutron Rietveld refinement informed us precis…
In pebble bed reactors the fuel forms a randomly stacked pebble bed with non-uniform fuel densities, affecting neutronics (streaming) and thermodynamics (wall channeling). To investigate these effects, computational tools are needed capable of generating realistic pebble beds, and experimental results to validate thes…
A special pair model composed of two cofacial zinc porphyrins (acceptor) linked to a free base (donor) acts as an energy transfer dyad. Despite the absence of conjugation, ππ*/charge transfer excited states and ultrafast energy transfer (∼5 ps) are noted.
The synthesis of ligand L based on a 2,6-bis[(N,N-bis(methylene phosphonic acid)aminomethyl] pyridine scaffold is described. Potentiometry combined with UV-Vis absorption spectrophotometric titrations were used to determine the protonation constants of the ligand and the stability constants of its corresponding Cu(II)…
A facile single-step method was developed for synthesizing todorokite-type manganese oxide octahedral molecular seieves (OMS-1) and 2 x 4 tunnel structured manganese oxide (OMS-5) materials. Selection of starting materials and initial pH conditions in the syntheses are crucial.
Poly(2-(methacryloyloxy)ethyl phosphorylcholine) (PMPC) chains were grown from near-monodisperse 13 µm diameter quartz fibres using surface-initiated atom transfer radical polymerisation (ATRP) at ambient temperature in 1 : 1 methanol–water at 20 °C. A covalently-bound siloxane-based ATRP initiator provided a sufficie…
Novel, dual-band, single and double negative metamateri- als composed of nonconcentric and difierent sized delta loop resonators are presented. The proposed structures provide two distinct resonant frequencies in the microwave region. Efiective medium parameters of these metamaterial structures are extracted using ret…
We describe the stabilisation of liquid-air surfaces by microparticles of a low surface energy solid. By varying the surface tension of the liquid, various particle-stabilised materials from oil dispersions to air-in-oil foams to dry water can be prepared.