Materials Literature
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A series of lanthanide complexes with the 4-ethylbenzoic acid ligand (4-eba), [Ln(4-eba)3(phen)]2 (Ln = Nd (1), Sm (2), Eu (3), Tb (4), Dy (5) and Ho (6); phen = 1,10-phenanthroline), have been synthesized and structurally characterized by single-crystal X-ray diffraction. In the isostructural complexes 1–4, two Ln3+…
The continued growth of the world’s developing countries has placed an ever increasing demand on traditional fossil fuels. This increased demand for fossil fuels has lead to increasing research and development of alternative energy sources. Hydrogen gas is one of the potential alternatives under development. It is ant…
A model is developed for anisotropic ceramic crystals undergoing potentially large deformations that can occur under significant pressures or high temperatures. The model is applied to describe silicon carbide (SiC), with a focus on α-SiC, specifically hexagonal polytype 6H. Incorporated in the description are nonline…
We present a systematic study of the structural, electronic, magnetic and optical properties of icosahedral bimetallic Ag((13-p))Ni(p) (p < or = 6) clusters in the gas phase investigated in the framework of density functional theory (DFT and TDDFT). In the most-stable structures, the central position is found to be oc…
Mechanoluminescence (ML) in a CaAl 2 Si 2 O 8 : Eu 2 + phosphor was greatly enhanced by partial Sr 2 + substitution for Ca 2 + ; ML intensity reached a maximum at Sr 2 + content of 40 mol %. Moreover, ML was not observed at Sr 2 + content of 80 mol % or higher. To investigate the relationship between ML and the crysta…
Due to high neutron absorption cross section, boron and its compounds find extensive application in the nuclear industry. The former Metallurgy Division and the present Materials Processing Division have developed processes for the production of boron, its compounds and components for application as control/shutoff ro…
Nanospheres are the particles having the size range between 10-200 nm in diameter. Nanospheres can be amorphous or crystalline in nature and also they have the ability to protect the drug from enzymatic and chemical degradation. It has been shown that the hydrophobic surfaces of these particles are highly susceptible…
We focused on qualitatively exploring the basic mechanisms involved in the Ionic gelation (IG) process, a method quite frequently used for synthesis of chitosan (CS) microparticles (MPs) and nanoparticles (NPs).We synthesized CS MPs and NPs using the Ionic gelation and microemulsion methods, and characterized the CS N…
The electrochemical properties of small carbon nano-onions (CNOs) in the solid phase, nonmodified carbon nano-onions (n-CNOs), and CNOs functionalized with carboxylic acid groups [oxidized carbon nano-onions (ox-CNOs)] were investigated by cyclic voltammetry. The redox properties of CNO films depend on the functionali…
The oxygen nonstoichiometry of has been measured as a function of at temperatures between 600 and by coulometric titration and thermogravimetry. An ideal solution defect model, a regular solution model, and a defect association model, taking into account the association of reduced dopant species and oxygen vacancies,…
Vanadium oxide inverse opal structures were fabricated by electrochemical deposition into self-assembled colloidal crystal templates and electrochromic performance was measured from the resulting macroporous vanadium oxide films. The periodic inverse opal structure resulted in an increased switching speed and a higher…
This article provides an overview of current developments with regard to the use of AuI compounds as precursors in the synthesis of Au nanostructures with controlled shapes or morphologies. We begin with a brief description of the difference between AuI and AuIII compounds, followed by a discussion on how the solubili…
Photochromic switches fulfill the general molecular design criteria for the surprisingly straightforward small-scale integration of seemingly complex set–reset latches. The implications of this re-interpretation are discussed with the example of a dithienylethene photochrome. The concept is shown to be valid for a mul…
Nickel-oxide-based nanocomposite films were deposited using radio-frequency magnetron sputtering from ceramic targets composed of lithium, nickel, and tungsten oxides.The resulting films are partially prelithiated and exhibit a slight spectral shift relative to tungsten-free films when colored.Electron microscopy and…
The complex [Fe(II){(CN)Fe(III)L(5)}(6)]Cl(2) consists of a mixed-valence heptanuclear cyanide-bridged unit formed of a Schiff-base pentadentate ligand L(5) and it shows a spin crossover of the peripheral Fe(III) centres.
OBJECTIVES: Although many nanomaterials are being used in academia, industry and daily life, there is little understanding about the effects of nanoparticles on the reproductive health of vertebral animals, including human beings. An experimental study was therefore performed here to explore the effect of calcium phos…
A novel selective nanoscale etching process that generated a well defined hollow nanostructure was developed by treating manganese oxide nanoparticles with a hydroxylamine solution. This selective etching process was used for exploiting a novel method of differentially functionalizing the internal surface of a hollow…
Heterotrinuclear Zn(2)Ln (Ln = Nd 2, Eu 3, Tb 4, Er 5, Yb 6) clusters [(Znq(2))(2)](mu-CH(3)COO){Ln(hfac)(2)} (q = 8-hydroxylquinolinate, hfac = hexafluoroacetylacetonate) have been synthesized. The Zn(2)Ln framework is ligated by two q ligands featuring mu-phenoxo and two q ligands featuring mu(3)-phenoxo coordinatio…
We investigate the development of the cross-link density, viscoelasticity and swelling behavior of polyethylene glycol monoacrylate (PEGMA) as affected by the dispersion of multi-walled carbon nanotubes, CNTs, in the volume fraction, φ, range of 10−4 to 5 × 10−3. Linear viscoelastic material functions of the PEGMA–CNT…
Five new cuprous halides formulated as [etpy][Cu(3)I(4)] 1, [mepy][Cu(2)Br(3)] 2, [mepy][Cu(2)I(3)] 3 [dmebpp][Cu(7)Br(9)] 4 and [dmeDABCO](4)[Cu(8)I(16)] 5 (etpy = N-ethylpyridyl; mepy = N-methylpyridyl; dmebpp = N,N'-dimethyl-1,3-bis(4-pyridyl)propane; dmeDABCO = N,N'-dimethyl-1,4-diazabicyclo-[2.2.2]octane) have be…