Materials Literature
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Drop shape analysis of pendant drops is a commonly used technique to measure the interfacial tension of liquid–vapor or liquid–liquid interfaces. The technique is increasingly being used to investigate the mechanical response of molecular structures that form at these interfaces as well, utilizing analysis techniques…
Members of the layered rare-earth hydroxides (LRHs) family with the generalized formula (Y(1-x)Ln(x))(2)(OH)(5)NO(3)·nH(2)O (Ln = Tb, Eu; 0% ≤x≤ 100%) (named as YTb-LRHs, YEu-LRHs) have been synthesized via a hydrothermal route. Crystal structures and elemental compositions have been investigated by X-ray diffraction…
Polyaniline(PAni) doped with formic acid was synthesis by chemical polymerization method using ammonium persulphate as oxidizing agent. Polyaniline /n-silicon hetrojunction have been fabricated by spin coating of polyaniline onto n-type silicon substrates. I-V characteristic of these junction diode show rectifying beh…
This paper reports a number of recent developments in the intercalation chemistry of Al(OH)(3). From Rietveld refinement and solid-state NMR, it has been possible to develop a structural model for the recently reported [M(II)Al(4)(OH)(12)](NO(3))(2)·yH(2)O family of layered double hydroxides (LDHs). The M(2+) cations…
In this paper, a facile and economical route based on an oxidation induced phase transformation in alcoholic solution was developed to prepare mesoporous CeO2 nanoflowers. The whole process could be divided into two steps: the formation of Ce(HCOO)3 with flower-like structures and the oxidation induced phase transform…
Ceria and nickel-doped ceria necklace-like nanowires were synthesized by a facile, surfactant free method, through an unconventional assembly route. Homogeneous doping of lower-valent cations introduces elastic strain, resulting in extrinsic surface defects and higher catalytic performance in CO oxidization.
A facile synthetic route under mild conditions to the preparation of gold nanostars (GNSs) with Fe3O4 cores (Fe3O4@GNSs), possessing magnetization and tunable optical properties from the visible to near-infrared (NIR) region, was developed. Additionally, the resulting Fe3O4@GNSs described here show good catalytic acti…
ZnO nanoparticles with bright photoluminescence and different colors were synthesized through a very facile sol–gel method in triethylene glycol solvent at room temperature. Unexpectedly, the solvent molecules were found to be oxidized by air in the presence of LiOH and finally modified on ZnO nanoparticles. The molar…
A new series of ferroelectric Aurivillius oxides containing Sc3+ in the B site in stoichiometric compositions, Bi2+2xSr1−2xNb2−xScxO9 (x = 0.05, 0.10, 0.15, 0.20), were synthesized by a standard solid state method and characterized by powder X-ray diffraction, dielectric and ferroelectric measurements. The ferroelectr…
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We present a fundamental method to assess the doping limits of hetero-polar materials; applied to the case of ZnO, we show clearly that electrons are stable and holes are unstable under the limits of thermodynamic control. © 2011 The Royal Society of Chemistry.
We find that a Lennard-Jones mixture displays a dynamic phase transition between an active regime and an inactive one. By means of molecular dynamics simulations and of a finite-size study, we show that the spacetime dynamics in the supercooled regime coincides with a dynamic first-order transition point.
Nanotechnology is research and development that involves measuring and manipulating matter at the atomic, molecular, and supramolecular levels at scales measured in approximately 1 to 100 nanometers (nm) in at least one dimension.†Materials at such small scales often exhibit different electrical, magnetic, optical,…
the National Natural Science Foundation of China (NO.20903078);the Natural Science Foundation of Hebei Province (NO.B2009000347);Hundred Excellent Innovation Talents from Universities and Colleges of Hebei Province (NO.CPRC020);the Open Foundation of State Key Laboratory of Solid Lubrication (Lanzhou Institute of Chem…
This study deals with the reduction of tin oxide by hydrogen in the temperature range of 773∼1023 K and the hydrogen partial pressure of 30.4∼101.3 kPa. It aims to investigate the kinetics of the reaction between tin oxide and hydrogen. The hydrogen reduction of tin oxide is to be related with the efforts to extract t…
Mesoporous silica nanoparticles MCM -41 were synthesized with two dimensional hexagonal p6mm symmetry, high specific surface area(~ 980m 2 /g) narrow pore size and an average particle size of 186 nm. The produced nanoparticles were used to encapsulate carbamazepine through a supercritical carbon dioxide process combin…
In this work, we have successfully synthesised ZnO crystal thin film with a high quality from hydrothermal reaction on sapphire substrate. The growth mechanism is clarified based on an extensive XTEM study. In addition, electrical and optical properties of the crystal thin film, which can be controlled by impurities,…
The gas-phase thermochemistry of actinide monosulfides, AnS, was investigated experimentally and theoretically. Fourier transform ion cyclotron resonance mass spectrometry was employed to study the reactivity of An(+) and AnO(+) (An = Th, Pa, U, Np, Pu, Am and Cm) with CS(2) and COS, as well as the reactivity of the p…
The synthesis and characterization of a series of 2,2'-biquinolines differently substituted in the 4,4'-position and their corresponding silver(I) derivatives obtained through reaction with silver triflate in a 1 : 1 stoichiometric ratio are reported. In order to perform a systematic investigation on the role played b…
The present study reports the simultaneous formation of graphene sheets and hydrogen by methane decomposition using cobalt catalysts. The production of graphene structures can be promoted by adjusting the method and conditions employed in the preparation of the metallic catalyst. The use of methane as a reducing agent…