Materials Literature
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w h e re, V = Dissolution medium vo l u m e C S = Sat u rated solubility of the co m pound in the medium Sink = Sink condition facto r To increase the maximum dissolvable dose,o n e needs to increase the dissolution media vo l u m e, change the media to increase the sat u ration solub i l i ty of the co m po u n d,or…
The thermal step method (TSM) is a nondestructive technique which measures the distribution of the electric field and space charge density across solid insulating materials. This work first reviews the principle and the basic equations of the TSM when used on a short circuited flat insulating structure (film or plate)…
Gold nanoparticles have been functionalized with thiol dendrons containing three redox active amidoferrocenyl or silylferrocenyl units; using cyclic voltammetry, these dendronized gold nanoparticles recognize H2PO4-.
Wet chemistry methods known as “chimie douce” bring together organic and inorganic chemists. They offer new opportunities for the chemist’s imagination and lead to the synthesis of novel hybrid or bio-inspired materials.
This work establishes a method for obtaining the viscosity-temperature curve for glasses on the basis of the characteristic points obtained by hot stage microscopy and the comparison with the viscosity-temperature curves measured with a high temperature viscometer. Viscosity-temperature curves were determined for thre…
An all solid-state thin film supercapacitor (TFSC) was fabricated with an amorphous ruthenium oxide thin film electrode and an amorphous (Lipon) thin film electrolyte. The electrochemical behavior of the was characterized by a charge-discharge technique in the potential range of 0-2 V. The exhibited a behavior of a bu…
The reaction of Pr(NO3)3·6H2O with 4,4′-bipyridine N,N′-dioxide (L) and K3[M(CN)6] [M = FeIII, CoIII] gives isomorphous heteropolynuclear complexes with formula [{(H2O)5LPr–NC–M(CN)5 }(μ-L)]·0.5L·4H2O, which exhibit a novel supramolecular architecture created by the interplay of coordinative, hydrogen bonding and π–π…
A series of novel polymeric compounds of formula [M(btzb)3][ClO4]2 (MII = Fe, Ni or Cu) with btzb = 1,4-bis(tetrazol-1-yl)butane have been prepared and their physical properties investigated. The btzb ligand has been prepared and its crystal structure determined, together with a tentative crystal structure of the 3-D…
A series of magnesia-supported palladium catalysts (Pd loading in the range 0.5–7.0 wt.%) has been prepared by impregnation from aqueous solutions of PdCl2 , Pd(NH3)4Cl2 and Pd(CH3COO)2 and characterised by X-ray diffraction (XRD), CO chemisorption and high resolution transmission electron microscopy (HRTEM). The gas-…
The intercalation mechanism of lithium ions into graphite layers has been studied in organic solvents employing nuclear magnetic resonance (NMR) and electrochemical impedance spectroscopy (EIS) experiments. The lithium ions solvated with these solvent molecules were shown to intercalate into the graphite lattices by N…
Research Article| March 01, 2001 Metamorphic diamonds: Mechanism of growth and inclusion of oxides L.F. Dobrzhinetskaya; L.F. Dobrzhinetskaya 1Institute of Geophysics and Planetary Physics, University of California, Riverside, California 92521, USA Search for other works by this author on: GSW Google Scholar H.W. Gree…
Binary titanium alloys with the beta-stabilizing elements of Co, Cr, Cu, Fe, Mn and Pd (up to 30%) and Ag (up to 45%) were examined through metallographic observation and X-ray diffractometry to determine whether beta phases that are advantageous for dental use could be retained. Corrosion behavior was also investigat…
Shape memory alloys (SMA), because of their unique mechanical characteristics and shape memory effect (SME), have been widely used as force and displacement actuators in many fields [DUERING et al, 1990]. In the industrial applications, it is necessary not only to calculate the mechanical response of the actuator in t…
The life model proposed previously by the authors ascribes electrothermal aging to the formation and/or enlargement of nanovoids driven by electromechanical energy stored in local concentrations of space charge. In the previous work, the strain associated with the mechanical stress produced by the space charge center…
Using in situ FTIR spectroscopy and mass spectrometry, it has been demonstrated that deNOx activity in oxide-based catalysts such as ceria can be correlated to the amount of oxygen vacancies present on the surface of the material. These results have been correlated to the total amount of exchanged oxygen for ceria-bas…
Nonpolluting systems based on anionic polyurethane aqueous dispersions were obtained. The prepolymer based on hydroxyl-terminated polybutadiene (HTPB), isophorone diisocyanate (IPDI), poly(propylene glycol) (PPG), and dimethylolpropionic acid (DMPA) were synthesized in bulk. After neutralization with triethylamine (TE…
We applied the electrochemical atomic layer epitaxy (ECALE) methodology to obtain deposits of CdS and ZnS on Ag(111) by alternate underpotential deposition of the elements forming the compounds. The amounts of the elements deposited, determined by stripping coulometry, always yielded a stoichiometric 1:1 ratio. The de…
Silk fabrics were modified by treatment with tannic acid (TA) solution or by acylation with ethylenediaminetetraacetic (EDTA) dianhydride. Kinetics of modification with TA and acylation with EDTA–dianhydride was investigated. The physico-mechanical properties of silk fabrics acylated with EDTA–dianhydride remained unc…
Aromatic polyamides based on a novel bis(ether-carboxylic acid) were synthesized by the direct phosphorylation condensation method. 1,4-Bis(4-carboxyphenoxy)-2,5-di-tert-butylbenzene was combined with various diamines containing flexible linkages and side substituents to render a set of eight novel aromatic polyamides…
Chiral binaphthyl derivatives having two photochromic diarylethene units were synthesized in an attempt to use them as dopants for photoresponsive liquid crystals. These compounds showed thermally irreversible photochromic reactions. The circular dichroism (CD) spectra and the optical rotation values of the derivative…