Nazzareno Re、Raffaella Crescenzi、Carlo Floriani 等 5 位作者1998-05-02Inorganic Chemistry
The reaction of [Fe(salen)](+) and {A(3)[Fe(CN)(6)]} (A = NEt(4), K), depending on the countercation A(+) and on the reaction solvent, led to [(NEt(4)){Fe(salen)}(2){Fe(CN)(6)}](n)(), 4, and [{Fe(salen)}(3){Fe(CN)(6)}(MeOH)(2)](n)().3nH(2)O, 5 [NEt(4) = tetraethylammonium cation, salen = N, N'-ethylenebis(salicylidene…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesOrganic and Molecular Conductors Research
Chang-Kwon Kang1998-05-02Journal of Applied Polymer Science
A mathematical model for solid-state polymerization of poly(ethylene terephthalate) was developed. The effects of temperature and chain entanglement on chain mobility were considered to estimate the rate constants of chemical reactions. The diffusivities of volatile byproducts could be determined using the free volume…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and CharacterizationMicroplastics and Plastic Pollution
Г. Е. Заиков、С. М. Ломакин1998-05-02Journal of Applied Polymer Science
New types of ecologically friendly polymer flame-retardant systems were proposed for Nylon 6,6 and polypropylene [high temperature polymer–organic char former, poly(vinyl alcohol), and silicon–inorganic system]. These systems can act in condensed and gaseous phases. The cone calorimeter and LOI tests indicated the imp…
Polymer Nanocomposites and PropertiesFlame retardant materials and propertiesSynthesis and properties of polymers
Roberta Alfani、Salvatore Iannace、L. Nicolais1998-05-02Journal of Applied Polymer Science
Starch-based polyurethane foams were synthesized by reacting a mixture of starch and polycaprolactone triol with an aliphatic diisocyanate, in the presence of water as blowing agent. Some foams were also prepared by adding a certain amount of polyethyleneglycol. The reaction kinetics is affected by the presence of sta…
biodegradable polymer synthesis and propertiesPolymer composites and self-healingPolymer Foaming and Composites
Ryu Abe、Masahiko Hara、Junko N. Kondo 等 6 位作者1998-05-02Chemistry of Materials
An ion-exchangeable thin film which has the layered structure of K 4 Nb 6 O 17 was prepared from a suspension of fine particles of K 4 Nb 6 O 17 . The superfine particles which were obtained by wet grinding were coated onto a substrate, and they were calcined between 873 and 1073 K. Crystallization of the fine particl…
Polyoxometalates: Synthesis and ApplicationsLayered Double Hydroxides Synthesis and ApplicationsChemical Synthesis and Characterization
Qiaoyuan Deng、Robert B. Moore、K. A. Mauritz1998-05-02Journal of Applied Polymer Science
Nafion®/SiO2, Nafion®/[ORganically MOdified SILicate (ORMOSIL)] and Nafion®/dimethylsiloxane hybrids were created via in situ sol–gel reactions for tetraethoxysilane, diethoxydimethylsilane, and their mixtures. Differential scanning calorimetry studies showed a broad endotherm for unfilled Nafion®-H+ at Tα ≈ 215°C tha…
High voltage insulation and dielectric phenomenaSilicone and Siloxane Chemistry
Kenneth M. Doxsee、Heidi R. Wierman1998-05-01Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
Crystallization of sodium acetate trihydrate from water affords hexagonal plates. When crystallized from cyclohexane, a solvent in which this salt is completely insoluble but in which it may be solubilized by macrocyclic crown polyethers, needle-shaped crystals are produced. This habit change is consistent with select…
Analytical Chemistry and ChromatographyCrystallization and Solubility StudiesChemical and Physical Properties in Aqueous Solutions
G. Danev、E. Spassova、J Assa 等 4 位作者1998-05-01Advanced Materials for Optics and Electronics
The possibilities of ‘resistless’ microstructuring of As36·1S63·9 wafers by soft X-ray irradiation and wet alkaline etching have been investigated. Scanning electron microscopy is used to study the influence of the exposure and processing parameters on the depth and acuity of the patterned structures. Structures 1 μm…
Phase-change materials and chalcogenidesX-ray Spectroscopy and Fluorescence AnalysisMineralogy and Gemology Studies
Toshio Yada1998-05-01Japanese Journal of Applied Physics
Experimental film formation of a rubber-based negative photoresist by spin coating relative to that of a diazoquinone sensitized positive photoresist was investigated. The baked film produced with the negative photoresist is thinner than that produced with the positive photoresist in the first stage of the spinning in…
High voltage insulation and dielectric phenomenaNanofabrication and Lithography TechniquesSurface Roughness and Optical Measurements
R. Feyerherm、M. F. Collins、G. P. Johari1998-05-01Physical review. B, Condensed matter
The low-temperature crystal structure and temperature dependence of lattice parameters and atomic mean-square displacements of thallium nitrite (${\mathrm{TlNO}}_{2})$ and cesium nitrite (${\mathrm{CsNO}}_{2})$ have been determined by neutron powder diffraction. Previously, based on specific heat and dielectric relaxa…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid-state spectroscopy and crystallography
M. Buivydas、S. T. Lagerwall、F. Gouda 等 5 位作者1998-05-01Ferroelectrics
The dielectric stabilization of the field-on states is an important feature for all SSFLC devices using the so-called C2 chevron geometry. This requires a combination of positive dielectric biaxiality and negative dielectric anisotropy. In the present work we use the phenylpyrimidine base mixture M192/62.5 as a non-ch…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsMolecular spectroscopy and chirality
R. A. Bisengaliev、B. V. Novikov、В. Б. Алесковский 等 7 位作者1998-05-01Physics of the Solid State
The method of molecular layering is used to prepare CdS thin films and CdS/ZnS and CdS/CdSe superlattices. The dependence of the exciton photoluminescence on film thickness is studied, and the role of internal strains is examined. The effect of the excitation intensity on the superlattice photoluminescence spectra is…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsElectronic and Structural Properties of Oxides
Yoshikatsu Ito、Sadayuki Asaoka、Koji Kokubo Shigeru Ohba 等 4 位作者1998-05-01Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
A variety of 1: 1 charge-transfer (CT) crystals were prepared by using mainly dinitrobenzoic acids (as the acceptor) and carbazoles (as the donor). Most of the CT crystals prepared from 3,5-dinitrobenzoic acid (3) and a series of N-alkylcarbazoles (1a−1h) underwent photoredox reactions initiated by the excited nitro g…
Photochemistry and Electron Transfer StudiesPhotochromic and Fluorescence ChemistryPhenothiazines and Benzothiazines Synthesis and Activities
G. Concas、Anna Corrias、Enrico Manca 等 6 位作者1998-05-01Zeitschrift für Naturforschung A
Abstract The reaction between hematite and aluminum in presence of allumina as diluent activated by Ball Milling powder mixtures in different energetic conditions has been investigated. To this purpose, the powders at different milling times have been characterized by X-ray Diffraction and Mössbauer Spectroscopy. A se…
Intermetallics and Advanced Alloy PropertiesIron and Steelmaking ProcessesThermal and Kinetic Analysis
Chris Nicklin、J. S. G. Taylor、N. Jones 等 5 位作者1998-05-01Journal of Synchrotron Radiation
An ultrahigh-vacuum environmental chamber for surface X-ray diffraction on Station 9.4 at the Synchrotron Radiation Source, Daresbury Laboratory, is described. Film growth can be monitored by simultaneously recording the Auger signal and the X-ray intensity at a particular point in reciprocal space. Such in situ measu…
Advanced Chemical Physics StudiesElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
V. Yu. Timoshenko、Е. А. Константинова、Th. Dittrich1998-05-01Semiconductors
Photovoltaic phenomena in the structures por -Si/ p -Si were investigated by the pulsed photovoltage method in the time interval 100 ns-10 ms using irradiation with nanosecond laser pulses with photon energies 1.4, 2.0, 2.8, and 3.7 eV. The data obtained show that besides the barrier photovoltage, due to the separatio…
Thin-Film Transistor TechnologiesSilicon and Solar Cell TechnologiesSilicon Nanostructures and Photoluminescence
Feng Cheng、Shinn‐Gwo Hong、Chi-An Ho1998-05-01The Journal of Adhesion
The adhesion properties of a thermoplastic olefin elastomer (TPO) after ozone exposure are studied with attenuated total reflection infrared spectroscopy (ATR), the lap shear test, and contact angle measurement. The ozone treatment is applied after the TPO is dip-coated with acrylic acid (AA) that is mixed with benzop…
Surface Modification and SuperhydrophobicityFiber-reinforced polymer compositesPolymer Nanocomposite Synthesis and Irradiation
M. V. Knat’ko、M. N. Lapushkin、V. I. Paleev1998-05-01Technical Physics Letters
Threshold photoemission spectroscopy is used to study the formation of a CsAu alloy during deposition of Cs on an Au substrate. It is shown that both the Cs surface layer and the CsAu near-surface alloy undergo indirect photoexcitation. It is found that the formation of a CsAu alloy is accompanied by a sharp rise (by…
Advanced Chemical Physics StudiesElectron and X-Ray Spectroscopy TechniquesPhotocathodes and Microchannel Plates
作者信息未提供1998-05-01Zeitschrift für Kristallographie - Crystalline Materials
Abstract The new compounds K 2 Cu 2 (SeO 3 ) 3 and K 2 Cu 3 (SeO 3 ) 4 were synthesized in the course of low-hydrothermal experiments on natrochalcite-type selenate representatives. The crystal structures were determined by direct methods from single-crystal X-ray diffraction data. K 2 Cu 2 (SeO 3 ) 3 : space group Cm…
Crystal Structures and PropertiesIron-based superconductors researchInorganic Chemistry and Materials
S. N. Lakiza、L. M. Lopato1998-05-01Metal Powder Report
From adjustment gears for sprinkler systems to surgical scissors, from latchbolts to parking gears, the winners of the Metal Powder Industries Federation's (MPIF) 1998 part-of-the-year design competition represent further market breakthroughs for powder metallurgy (PM). The winning parts show successful conversions fr…
Advanced ceramic materials synthesisAdditive Manufacturing and 3D Printing Technologies