Progress in Understanding SOFC Electrodes
Abstract For Abstract see ChemInform Abstract in Full Text.
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The Mechanical Properties of Rice Husk-Polyurethane Composites
In this study, polyurethane composites were produced with rice husk (RH) with polypropylene glycol, molecular weight (Mw) of 400 (PPG400) used as polyols. The effect of percentage of RH (by weight), percentage of RH hydroxyl (OH) groups, and RH size on the flexural, tensile, and impact properties were investigated. Fo…
Synthesis and Thermal Behavior of Polyesters Derived from 1,3‐Propanediol and Various Aromatic Dicarboxylic Acids
Seven aromatic dicarboxylic acids were esterified by melt polycondensation in two steps with 1,3‐propanediol (1,3‐PDO) in the presence of tetrabutoxytitanium as catalyst. The acids used were: terephthalic (TPA), isophthalic (IPA), naphthalene‐2,6‐dicarboxylic (2,6‐NDA), naphthalene‐1,4‐dicarboxylic (1,4‐NDA), biphenyl…
Oligonuclear Metal-Assembly of Antiferromagnetic Ni4 and Ferromagnetic Ni6 Clusters with Non-Schiff-Base Tetradentate Ligand
Abstract Tetranuclear and hexanuclear nickel(II) complexes with N,N′-bis(2-hydroxy-3,5-dimethylbenzyl)-N,N′-dimethyl-1,2-ethanediamine (H2L), [Ni4L2(CH3COO)4]·4THF and [Ni6L3(OH)4(NO3)2(H2O)2]·2DMF, have been synthesized and characterized by X-ray crystallography, electronic spectroscopy and magnetic susceptibility me…
Mechanical Properties of Kenaf–Thermoplastic Natural Rubber Composites
Kenaf–thermoplastic natural rubber (Kenaf–TPNR) composites were developed and evaluated in this study. The kenaf was blended with TPNR and maleic anhydride-grafted polypropylene (MAPP) as a compatibilizer in an internal mixer (Brabender). The mechanical properties of the composites were investigated by tensile, impact…
Magnetism of Carbon‐Based Materials
Abstract For Abstract see ChemInform Abstract in Full Text.
Effects of self-heating on integrated circuit metallization lifetimes
The authors present simulation results, an experimental technique, and a model for estimating the temperature rise and time-to-failure (TTF) of interconnect. They introduce the concept of derating factor for electromigration TTF due to self-heating. The derating factor is the factor by which the lifetime is reduced by…
Controlled Chemical and Drug Delivery via the Internal and External Surfaces of Layered Compounds
We demonstrate, and review the very small, but growing body of literature regarding a recently discovered application of layered compounds, which involves the ability of layered materials to sequester and later release molecules of chemical and biological significance. The application relies upon intercalation chemist…
Quantum saturation of the order parameter and the dynamical soft mode in quartz
The temperature evolution of the static order parameter of α-quartz and its soft-mode frequencies were determined at temperatures below 300 K. While these parameters follow classic Landau theory at higher temperatures, quantum saturation was found below room temperature with a characteristic quantum temperature of 187…
ZrO2 bubbles from core–shell nanoparticlesElectronic Supplementary Information (ESI) available: Time dependent UV-visible spectra of the reaction between Au@ZrO2 and CCl4. See http://www.rsc.org/suppdata/jm/b2/b210734a/
Selective removal of metal cores from core–shell Ag@ZrO2 (ZrO2 coated Ag) and Au@ZrO2 (ZrO2 coated Au) nanoparticles result in stable and freely suspendable oxide nanobubbles of varying dimensions, both in thickness and in diameter. The metal core is removed by a newly found reaction in which halocarbons, generally ch…
A linear SMA motor as direct-drive robotic actuator
A push-pull actuator for commanding the motion of the interphalangeal joints of anthropomorphic robotic hands is proposed. The actuator, based on coil springs, made of the shape-memory alloy Nitinol, is compact enough to be easily incorporated into the phalangeal structure of a robotic finger, thus eliminating the com…
Reactivity of Trimethylaluminum with Lanthanide Aryloxides: Adduct and Tetramethylaluminate Formation
The reaction of various highly substituted lanthanide(III) and -(II) aryloxide complexes with trimethylaluminum (TMA) was investigated. The solvent-free, π-arene-bridged dimers [Ln(OAr i Pr,H ) 3 ] 2, derived from the ortho- i Pr 2 -substituted aryloxide ligand OC 6 H 3 i Pr 2 -2,6, form bis-TMA adduct complexes, Ln(O…
Characterization of electromigration under bidirectional (BC) and pulsed unidirectional (PDC) currents
The electromigration of Al-1%-Si interconnects under bidirectional (BC) and pulsed unidirectional (PDC) signals is discussed. The effect of signal asymmetry, duty cycle and frequency on the damage generation rate has been tested. The data suggests that the equivalent DC current of a non-DC signal is given by the avera…
Purification of Naphthalene from Coal Tar Distillate by Solution and Melt Crystallizations
Purification of naphthalene from naphthalene-rich oil of coal tar distillates was explored by using the melt and solution crystallizations. The solid–liquid equilibrium of naphthalene–benzothiophene–methanol and naphthalene–benzothiophene systems were investigated. The crystal growth rates were characterized by supers…
Dipole fluid as a basic model for the equation of state of ionic liquids in the vicinity of their critical point
A model of dipole fluid for ionic liquids similar to molten NaCl is proposed. The estimates for the critical parameters are obtained with the help of the van der Waals equation of state. The influence of the rotation on the characteristics of a dipole pair and the location of the critical point is discussed. The disso…
Methanolysis of nitrile-functionalised pendant arm derivatives of 1,4,7-triazacyclononane upon coordination to CuIIElectronic supplementary information (ESI) available: frozen solution EPR (77 K) spectra for [Cu(1)](BF4)2 and [Cu(2)](BF4)2·H2O (Fig. S1) and [Cu(L2)Cl2] (Fig. S2) in CH3CN–DMF (9 ∶ 1) solutions. Modelling of the disorder in [Cu(1)](BF4)2 and [Cu(2)](BF4)2·H2O. See http://www.rsc.org/suppdata/dt/b2/b209091k/
The three ligands 1,4,7-tris(cyanomethyl)-1,4,7-triazacyclononane (L1), 1,4,7-tris(2-cyanoethyl)-1,4,7-triazacyclononane (L2) and 1,4-bis(2-cyanoethyl)-7-methyl-1,4,7-triazacyclononane (L3) have been treated with Cu(BF4)2·4H2O in refluxing MeOH to afford complexes [Cu(1)](BF4)2, [Cu(2)](BF4)2·H2O and [Cu(3)](BF4)2, re…
Surface Modification of Clays and Related Materials
This review analyzes various ways by which the surfaces of clay particles and related minerals can be non‐covalently modified, as well as some of the analytical approaches with which these surface modifications can be measured and quantified. Among the principal methods of modification of the surface properties of cla…
Effect of time/temperature treatment parameters on depolymerization of chitosan
Abstract Depolymerization of the biopolymer chitosan by an autoclaving process at 121°C and 15 psi was investigated using various treatments. Acetic acid was found to be the most effective solvent in decreasing chitosan viscosity among the six organic acids tested. The rate of viscosity decrease increased with increas…
Measurements of the lattice constant of ceria when doped with lanthana and praseodymia - the possibility of local defect ordering and the observation of extensive phase separation
Conventionally, the addition of sesquioxide cation dopants to ceria has been thought of as a class of almost model systems. The most important defect mechanism involves simple anion vacancy charge compensation with those vacancy defects associating themselves with the trivalent cation and being distributed randomly th…
Synthesis of Hyperbranched Aromatic Poly(amide−imide): Copolymerization of B‘B2 Monomer with A2 Monomer
A hyperbranched aromatic poly(amide−imide) was prepared by the copolymerization of 4-(3,5-dicarboxyphenoxy)phthalic anhydride, a B‘B 2 type monomer, and 1,4-phenylenediamine, an A 2 type monomer. The rapid reaction between the anhydride and amino group led to the formation of the dominant imide intermediate which can…