Materials Literature
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The neutral complex [PtCl(PyDT)](5) (PyDT = (CH(2))(4)NCS(2)(-)) represents the first example of a Pt(5) metallacycle. This unique architecture based on chiral S-bridged Pt(II) monomers was prepared by thermal degradation of the reaction product of PtCl(2) and a pyrrolidinedithioester.
Zn 10,15]triazaporphyrin have been prepared using novel synthetic approach by interaction of phthalonitrile with quaternary triphenylphosphonium salts in the presence of zinc powder.The obtained compounds were characterized by mass-spectrometry, 1 H NMR and UV-vis spectroscopy.
Abstract—Simple normalized dispersion relations for transverse magnetic (T M) and transverse electric (T E) propagating modes in parallel-plate waveguides filled with DPS/DPS or DNG/DNG, and DNG/DPS bilayers are presented. The evanescent T E0 mode of the waveguide filled with a DNG/DPS bilayer is characterized also by…
CeO2 and mixed CeO2-ZrO2 nanopowders were synthesized and efficiently deposited onto cordierite substrates, with the evaluation of their morphologic and structural properties through XRD, SEM, and FTIR. The modified substrates were employed as outer heterogeneous catalysts for reducing the soot originated from the die…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Pratama Jujur Wibawa, Mohd. Arif Agam, Hadi Nur, Hashim Saim; Changes in Physical Properties and…
Al–Sn–Zn alloys are considered to be a good alternative for lead-containing solders; however, their physical properties at high temperatures are investigated insufficiently. In this work we have studied density (by gamma-absorption method), electrical resistivity (by contactless method in rotating magnetic field) and…
This article is the last of three on the subject. A summary of the three articles appears in the proceedings of the ISEI conference, held in San Diego, June 6-9, 2010. The series is being published in the magazine to provide a comprehensive description of the work and for a wider distribution.
We present an algorithm for learning the function that maps a material structure to its value on some property, given the value of this function on several structures. We pose this problem as one of learning (regressing) a function of many variables from scattered data. Each structure is first converted to a weighted…
A magnetized micro rotor such as 1.6 mm in outer diameter was prepared from a laminated isotropic nanocrystalline film with an optimized self-bonding layer. A relative density(RD) higher than 85 % in perpendicular direction of the above film could be obtained, and an estimated permeance coefficient, B/μoH, exceeded 20…
Linear programming problems for Na-Al-Si-O-H system have been formulated and solved for calculations of standard enthalpies and Gibbs potentials of zeolites with unknown thermodynamic properties. The calculations are based on dual solutions of linear programming problems. Comparison of numerical results with published…
With activated carbon for reducing agent, the sol‐gel method was used to prepare the giant magnetoresistance materials Sr 2 FeMoO 6 , which is the double Perovskite oxide. The structure, morphology, magnetic and electrical transport properties were investigated respectively by x‐ray diffraction, scanning electron micr…
We have studied the structure of two lipopeptides based on the simple dipeptide building block L-Phe-D-Oxd. These peptides have been reported previously to form fiber-like materials. The lipopeptides synthesized here had the structures C(n)(2)H((2n+1))CO-L-Phe-D-Oxd-OBn or C(n)(2)H((2n+1))CO-D-Phe-L-Oxd-OBn with n = 5…
The present investigation emphasizes biomimetic synthesis of silver nanoparticles (AgNPs) using an aqueous extract of Areca catechu and its impact on a Dalton's ascites lymphoma (DAL) mice model. The ultraviolet (UV) spectrum of AgNPs at 428 nm confirmed the spherical shape of the particles and average size of 80 nm w…
Supported Rh nanoparticles obtained by reduction in hydrogen of severely calcined Rh/Mg/Al hydrotalcite‐type (HT) phases have been characterized by FT‐IR spectroscopy of adsorbed CO [both at room temperature (r.t.) and nominal liquid nitrogen temperature] and Transmission Electron Microscopy (TEM). The effect of reduc…
We report in this communication the study of the intramolecular electron transfer through a 2,7-diethynylfluorenyl spacer in the Fe(II)/Fe(III) mixed-valent (MV) complex [(η(2)-dppe)(η(5)-C(5)Me(5))FeC≡C(2,7-C(21)H(24))C≡CFe(η(5)-C(5)Me(5))(η(2)-dppe)][PF(6)] (1[PF(6)]). The complex is generated in situ by comproporti…
In this paper, we introduce a sol-gel process for preparing Y 2Si2O7:Eu3+ nanocrystals. The rare earth compounds were dispersed in the SiO2 colloids and the monodisperse nano-scale composite materials were prepared. The reactant mass fraction and heat treatment temperatures could affect the structures and emission spe…
Luminescence properties of BaY 2 O 4 :Eu 3+ are investigated by the site-selective laser-excitation spectroscopy in the temperature region 15–300 K. The phosphors were synthesized by the Pechini-type sol-gel method for different Eu 3+ -concentrations. Three different crystallographic sites corresponding to two Y 3+ si…
Rheology plays a major role both in production and application stages of paints. Na-Bentonite, clay based thickening agent, is generally used to modify the viscosity of paints, since it is more economical and environmentally friendly compared to polymer based thickening agents. In solvent based systems bentonite is ge…
In this paper, a power series solution is used to study effect of intermolecular forces on the instability of multi walled carbon nanotube (MWCNT) probes/actuators in the vicinity of thin and thick graphite. A hybrid nano-scale continuum model based on Lennard-Jones potential is applied to simulate the intermolecular…
Inclusion of porphyrins as crosslinkers within aqueous block copolymer assemblies imparts water solubility to the hydrophobic macrocycle, provides critical structural information about the particle interior, gives unique pH-independent photophysical properties, and has the potential for future development of SOD mimic…