Materials Literature
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The characterization of the proton sorptive properties of calcite in aqueous solutions at 25 +/- 1 degrees C over a relatively wide range of chemical conditions (7.16 <or= pH <or= 9.7; 3 x 10(-5) M <or=SigmaCa <or= 5 x 10(-3) M; 10(-4) M <or=SigmaCO(2)<or= 1.7 x 10(-3) M) and solid : solution ratios (0.4 to 12.3 g L(-…
An ideal metamaterial is composed of identical elements in a uniformly structured array so that the material response is a single magnetic or electric resonance. Variations in the metamaterial particle characteristics or array assembly result in undesirable broadening of the effective material response. When lumped ci…
Multifrequency continuous wave (cw) and echo-detected (ED) electron paramagnetic resonance (EPR) was employed to study the mobility of nitroxides confined in nanocapsules. The complexes p-hexanoyl calix[4]arene with 4-methoxy-2,2,6,6-tetramethylpiperidine-N-oxyl (MT) and N-(2-methylpropyl)-N-(1-diethylphosphono-2,2-di…
A new compound, [Fe(5–Cl-qsal)2][Ni(α-tpdt)2].CH3CN, where α-tpdt = 2,3-thiophenedithiolate and H5–Cl-qsal = N-(8-quinolyl)-5-chlorosalicylaldimine, was prepared and structurally and magnetically characterized. The crystal structure is based on an arrangement of alternate layers of [Fe(5–Cl-qsal)2]+ cations and [Ni(α-…
The present work demonstrates for the first time a template-free, single-step electrochemical method to synthesize ZnO hollow nanospheres with diameter in the range of 20–200 nm, which are formed by self-assembly of ZnO nanoparticles of <10 nm diameter.
Abstract Clay minerals are present in most sedimentary rocks. They find applicability in a wide range of disciplines, such as material, soil, earth, environmental, and biological sciences. Despite their abundance and use, swelling of clays under stress has not received enough scientific attention. We used a two-method…
Zinc oxide is a fascinating material with a combination of catalytic, electronic, optical, piezoelectric, and spintronic functionalities. It also has the most diverse configurations of simple or complex structures. ZnO therefore provides an ideal material platform for the construction of devices with micro- and/or nan…
The leaching of acetyl tributyl citrate (ATBC) from plastic kitchen wrap into water, aqueous acetic acid solution, and aqueous skim milk solution heated to 60°C was investigated. A new extraction method was developed to determine the leaching rate. It was found that ATBC is prone to migrate into protein liquids, such…
Reactions of N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine (H(4)edte) with MnCl(2).4H(2)O or FeCl(3).6H(2)O in MeOH or MeCN with different bases yield four butterfly-like tetranuclear clusters with fused defective dicubane M(4)O(6) cores: [Mn(II)(2)Mn(IV)(2)(mu(4)-Hedte)(2)(thme)(2)].MeCN () (H(4)edte = N,N,N',N'-…
Two novel enantiopure bis(pyrrolo[3,4-d])tetrathiafulvalene derivatives, substrates for preparing chiral conducting materials, show chiral crystal packing arrangements in which successive layers are rotated in accordance with an exact or approximate 43 axis. The corresponding donors containing fused dihydropyrrole gro…
A comparison of experimental results with numerical simulations is presented that shows the influence of electrode geometry on the impedance response for reactions involving one adsorbed intermediate. The local electrochemical impedance measurements performed on an iron disk electrode were in qualitative agreement wit…
Biodegradable porous polyurethanes scaffold have themselves opportunities in service, in-cluding controlled degradation rate, no-toxic degradation products. However, polyurethanes are lack of bioactive groups, which limits their application. This review gives the common modification methods, surface functionalization…
The effects of axial ligands on the ground-state geometries, electronic structures and the characteristic optical properties of iron phthalocyanine and its derivatives, FePc and FePcL(n) (L = pyridine (Py) and cyanide (CN(-)); n = 1, 2), were investigated using the density functional theory (DFT) method. The geometrie…
The correlation between capacitance and the structure of carbon nanotubes ͑CNTs͒ was revealed.The electrochemical behaviors of single-and double-walled CNTs were characteristic due to the electrochemical doping mechanism of semiconducting nanotubes, which are amphoteric and can be doped by both donors and acceptors.Th…
In (18)O tracer diffusion experiments slow oxygen exchange kinetics at the surface (i.e. a small oxygen exchange coefficient k*) often drastically decreases the (18)O concentration compared with cases of pure diffusion limitation and this restricts the applicability of such experiments to certain parameter regimes. In…
This paper introduces a new process for fabrication of high resolution Al2O3/SiC composite microcomponents using softlithography and non-aqueous ceramic suspension. Polysilazane is used to provide both binding force and SiC composition. The shape retention and dimensions of the microcomponents were analyzed using a sc…
The crystallization of N,N-di(n-cetyl)quinacridone (DCQA) gives two crystalline polymorphs A and B. It is found that crystalline polymorphs A and B adopt remarkable different packing structures. The form A crystal is characterized by the strong intermolecular π⋯π interaction and C–H⋯O interaction. The form B crystal d…
Rhenium complexes functionalised with thioester-terminated alkyl chains can be attached to gold nanoparticles to yield water-soluble, visibly luminescent Re-GNP hybrid conjugates.
The synthesis of nanocrystal-polymer nanocomposites is reported, in which 2-(2-ethoxyethoxy)ethoxy modified polythiophene serves as the protecting group for dispersion and homogeneous size distribution of the nanoparticles, showing potential of this polymer-based material in optoelectronics and microelectronics.
In this study, the syntheses of octakis(hydroxyethylsulfanyl) phthalocyaninatomanganese(III) chloride and its chlorinated derivative, octakis(chloroethylsulfanyl) phthalocyaninatomanganese(III) chloride, and successive electrochemical investigations of the latter were reported. The voltammetric studies of the complex…