Silke Behrens、Dieter Fenske1997-11-01Berichte der Bunsengesellschaft für physikalische Chemie
Abstract A method of synthesis for cadmium selenide and cadmium telluride clusters is proposed. PhSeSiMe 3 reacts with [CdCl 2 (PPh 3 ) 2 ] to yield a series of cadmium selenide clusters depending on the kind of solvent used. The reaction of PhTeSiMe 3 with CdCl 2 and PEt 3 yields a cadmium telluride cluster. Crystall…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsNanocluster Synthesis and Applications
Hilary G. Fijolek、P. Gonzàlez-Duarte、Sang Hyun Park 等 5 位作者1997-11-01Inorganic Chemistry
A variety of spectroscopic methods have been used to deduce the solid-state structure of Ag 2 [S(CH 2 ) 5 S] ( 1 ), the yellow compound formed by mixing of Ag + and 1,5-pentanedithiol. Solid-state reflectance UV−vis, X-ray diffraction, cross-polarization magic angle spinning (CPMAS) 13 C NMR, and CPMAS 109 Ag NMR spec…
Gold and Silver Nanoparticles Synthesis and ApplicationsNanocluster Synthesis and ApplicationsOrganometallic Compounds Synthesis and Characterization
Richard J. Day、Peter A. Lovell、Dorian Pierre1997-11-01Polymer International
A range of sub-micron size three-layer toughening particles have been prepared by sequential emulsion polymerization, each type of particle comprising a glassy polymer core, a rubbery inter-layer and an outer layer of glassy polymer, which was functionalized using either glycidyl methacrylate or methacrylic acid. Each…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesEpoxy Resin Curing Processes
Alexandr G. Potapov、В. В. Кривенцов、Dmitrii I. Kochubey 等 5 位作者1997-11-01Macromolecular Chemistry and Physics
Abstract Extended X‐ray absorption fine structure analysis (EXAFS) has been used to study supported TiCl 4 /MgCl 2 catalysts containing 1.8 wt.‐% Ti. Adsorbed TiCl 4 was found to exist on the MgCl 2 surface as a dimeric complex. The possible structures of dimeric TiCl 4 complexes on the (100) face of MgCl 2 are discus…
Catalytic Processes in Materials ScienceInorganic and Organometallic ChemistryX-ray Diffraction in Crystallography
Mousumi De Sarkar、P. G. Mukunda、Prajna P. De 等 4 位作者1997-11-01Rubber Chemistry and Technology
Abstract Degradation of hydrogenated styrene—butadiene rubber (HSBR) having different levels of unsaturation has been studied over a wide range of temperatures under anaerobic and aerobic conditions using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), IR and NMR spectroscopy. TGA data indic…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesThermal and Kinetic Analysis
Oskar Liivak、A. Flores、Randolph V. Lewis 等 4 位作者1997-11-01Macromolecules
Solid state 13 C NMR is used to identify the conformation of alanine residues in minor ampullate gland silk from Nephila clavipes and in a genetically engineered protein based on the consensus sequence of MaSp2, a protein present in low concentrations in major ampullate gland silk. The results of the NMR on minor ampu…
Silk-based biomaterials and applicationsPhytochemical compounds biological activitiesBiochemical and Structural Characterization
R.I. Merino、J. A. Pardo、J.I. Peña 等 6 位作者1997-11-01Physical review. B, Condensed matter
${\mathrm{Er}}^{3+}$-doped ${\mathrm{ZrO}}_{2}\ensuremath{-}\mathrm{C}\mathrm{a}\mathrm{O}$ eutectic crystals with ordered microstructure have been grown by the laser floating zone method. The microstructure consists of alternating 2 \ensuremath{\mu}m thick lamellae of calcia-stabilized zirconia (CaSZ) and ${\mathrm{C…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies
Lluís Carrillo、Jordi Ortı́n1997-11-01Physical review. B, Condensed matter
We present an experimental study of phase-transition avalanches during the stress-induced formation of martensite in a Cu-Zn-Al alloy, with particular attention to the effect of cycling. We have analyzed statistically the amplitudes, durations, and energies of the thermal events accompanying the transition, and found…
Magnetic properties of thin filmsTheoretical and Computational PhysicsMagnetic Properties and Applications
L. A. Balagurov、D. G. Yarkin、G. A. Petrovicheva 等 6 位作者1997-11-01Journal of Applied Physics
Al/PS/c-Si photodiode structures were fabricated with a porous silicon (PS) layer of high porosity. Photosensitivity spectra, current–voltage (I–V) dependences at different temperatures, and electron beam induced current profiles were analyzed. Effects of annealing on the device characteristics were studied. The photo…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsSemiconductor materials and interfaces
Koichi Hatada、Tatsuki Kitayama、Koichi Ute 等 5 位作者1997-11-01Macromolecules
1 H NMR spectra of poly(methyl methacrylate) prepared with benzoyl peroxide in toluene at 100 °C were measured on a 750 MHz high-resolution NMR spectrometer. End groups resulting from initiation, chain transfer, and termination reactions were assigned, and the numbers of end groups per polymer molecule were estimated.…
Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesAdvanced NMR Techniques and Applications
Ping Xie、Rongben Zhang1997-11-01Polymers for Advanced Technologies
A series of highly ordered ladder-like polysilsesquioxanes (LPS) has been synthesized via "stepwise coupling polymerization" in recent years. Among them some new kind of reactive polymers, such as polyhydrosilsesquioxane, polyvinyl (or allyl) silsesquioxane, polyethoxysilsesquioxane, etc. as parent polymers, can be fu…
Synthesis and characterization of novel inorganic/organometallic compoundsSynthesis and properties of polymersSilicone and Siloxane Chemistry
Jonathan R. Friedman、Uri Voskoboynik、M. P. Sarachik1997-11-01Physical review. B, Condensed matter
We report measurements in natural horse-spleen ferritin that provide a detailed mapping of the blocking temperature, ${T}_{B},$ as a function of magnetic field over a broad range up to 20 kOe. Unlike most superparamagnetic materials where it decreases with applied field, ${T}_{B}$ increases with increasing field at sm…
Photosynthetic Processes and MechanismsTheoretical and Computational PhysicsMagnetism in coordination complexes
Ramadhar Singh、Amarjeet K. Narula1997-11-01Journal of Applied Physics
The dc conductivity, dielectric constant, and electron spin resonance measurements have been performed on samples of polypyrrole, poly(N-methyl pyrrole-pyrrole), and poly(N-methyl pyrrole) having different BF4− concentrations in the temperature range 77–350 K. Different parameters evaluated from these measurements sup…
Conducting polymers and applicationsElectrochemical Analysis and ApplicationsAnalytical Chemistry and Sensors
Andrej Atrens、B. Baroux、Marc Mantel1997-11-01Journal of The Electrochemical Society
An examination has been carried out of the secondary passive film on Type 304 stainless steel in 0.5 M H 2 SO 4 . The characterization techniques used were electrochemical (potentiodynamic, potentiostatic, and film reduction experiments) and surface analytical. A bilayer model for the secondary passive film is propose…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsConcrete Corrosion and Durability
Jörg Kleinwächter、Michael Hanack1997-11-01Journal of the American Chemical Society
The synthesis and spectroscopic properties of a series of soluble octaalkoxy-substituted silicon phthalocyanine monomers, (RO) 8 PcSi(OSiMe 2 tBu)L, and μ-oxo-bridged dimers, [(RO) 8 PcSi(OSiMe 2 tBu)] 2 O (R = H 17 C 8 -, H 25 C 12 -, (±)-3,7-Me 2 -C 8 H 15 -, (±)-2-Et-C 6 H 12 -; L = -OSiMe 2 tBu, -OSiMe 3, -F, -OH)…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
P. Olier、F. Barcelo、Jean-Luc Béchade 等 6 位作者1997-11-01Journal de Physique IV (Proceedings)
Investigation of precipitation is performed on several near equiatomic TiNi alloys elaborated by arc melting or by powder metallurgy (combustion synthesis mode). These alloys contain various amount of impurities (oxygen, carbon , nitrogen). We show that such impurities result in both oxides (Ti4Ni2Ox, with x ≤ 1) and…
Metal and Thin Film MechanicsShape Memory Alloy TransformationsTitanium Alloys Microstructure and Properties
Atsushi Shiota、Christopher K. Ober1997-11-01Polymer
Smectic network formation using a twin liquid crystalline epoxy monomer (4-(oxiranylmethoxy)benzoic acid 1,8-octanediylbis(oxy-4,1-phenylene) ester) cross-linked with sulfanilamide was examined in real time by polarizing optical microscopy, X-ray diffraction, dynamic viscometry and differential scanning calorimetry. T…
Liquid Crystal Research AdvancementsPhotochromic and Fluorescence ChemistrySynthesis and properties of polymers
Alexander Franke、Mark L. Schattenburg、Eric M. Gullikson 等 6 位作者1997-11-01Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena
Blazed, grazing incidence x-ray reflection gratings are an important component of modern high resolution spectrometers and related x-ray optics. These have traditionally been fabricated by diamond scribing in a ruling engine, or more recently by interferometric lithography followed by ion etching. These traditional me…
Advanced MEMS and NEMS TechnologiesAdvanced Measurement and Metrology TechniquesOptical Coatings and Gratings
Elizabeth Kapiloff、Kent M. Ervin1997-11-01The Journal of Physical Chemistry A
The chemical reactivity of cobalt cluster anions, Co n - ( n = 2−8), toward O 2, N 2, and CO is investigated by flow tube reactor kinetics. The reactivity is highest for the reactions with O 2 and intermediate for CO, while the clusters are nearly inert toward N 2 . Only the largest clusters studied, Co 7 - and Co 8 -…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceRadioactive element chemistry and processing
H. Chen、T. J. Siebenmorgen1997-11-01Cereal Chemistry
ABSTRACT Three cultivars of long‐grain rice were milled to three degree of milling (DOM) levels. Inverse linear relationships were established between surface fat concentration (SFC) and Satake milling meter (MM1B) optical DOM measurement values, including whiteness, transparency, and DOM, for the unfractionated head…
Spectroscopy and Chemometric AnalysesTextile materials and evaluations