Zhijun Zhang、A. L. Verma、Kenichi Nakashima 等 6 位作者1997-10-01Langmuir
Substrate-dependent energy transfer and aggregation in Langmuir−Blodgett (LB) films of 5-(4- N -octadecylpyridyl)-10,15,20-tri- p -tolylporphyrin (porphyrin 338a) have been investigated by ultraviolet−visible (UV−vis) and fluorescence spectroscopies. It has been found that the porphyrin molecules form different kinds…
Photosynthetic Processes and MechanismsLipid Membrane Structure and BehaviorPorphyrin and Phthalocyanine Chemistry
Han Dejun、Guohui Li、Feng Yan 等 4 位作者1997-10-01IEEE Photonics Technology Letters
An avalanche enhanced AlGaAs-GaAs punchthrough heterojunction phototransistor with an improved guard-ring emitter structure has been proposed. It has demonstrated a record high sensitivity of 5790 A/W and optical conversion gain of 10810 at 400-nW incident optical power level. Its novel guard-ring emitter structure ca…
Semiconductor Quantum Structures and DevicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
John D. Russell、J. L. Kardos1997-10-01Polymer Composites
Abstract Crosslinking in AFR700B polyimide was studied using several techniques. Crosslinking could not be detected using Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). Swelling in n‐methyl pyrrolidone (NMP) showed network formation occurs at cure temperatures ≥325°C (617°F…
Polymer Nanocomposites and PropertiesEpoxy Resin Curing ProcessesSynthesis and properties of polymers
Michael Veith、S. Kneip、A. Jungmann 等 4 位作者1997-10-01Zeitschrift für anorganische und allgemeine Chemie
Abstract tert‐Butanolate von Germanium(II), Zinn(II) und Blei(II) der Formel {M[OC(CH 3 ) 3 ] 2 } n (M Ge, n = 2; M Sn, n = 2; M Pb, n = 3) sowie die entsprechenden Heterometallalkoxide M′M 2 [O‐C(CH 3 ) 3 ] 6 (M Ge, M′ Sr, Ba; M Sn, M′ Ca, Sr, Ba; M Pb, M′ Ca, Ba) wurden in einem CVD‐Prozeß (Chemic…
Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisSilicone and Siloxane Chemistry
Alfons Zoeller、Rainer Goetzelmann、Harro Hagedorn 等 5 位作者1997-10-01Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
Plasma-IAD with the APS (advanced plasma source) has been introduced into the market in 1992. Up to now this technique is used worldwide in almost 100 coating systems. A large number of different layer systems has been investigated in R&D and applied in production. For ophthalmic applications plasma-IAD with the APS i…
Metal and Thin Film MechanicsOptical Coatings and GratingsSurface Roughness and Optical Measurements
Jie Yu、Philippe Dúbois、R. Jérôme1997-10-01Macromolecules
Anionic random and block copolymerization of isobornyl methacrylate (IBMA) and methyl methacrylate (MMA) has been studied in THF at −78 °C by using (1,1-diphenyl-3,3-dimethylbutyl)lithium (DDBLi) as initiator in the presence of LiCl. The random copolymerization of MMA and IBMA has also been carried out at 0 °C, all th…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and CharacterizationPolymer Nanocomposites and Properties
Delphine Prévôté、Sylvie Le Roy-Gourvennec、Anne‐Marie Caminade 等 5 位作者1997-10-01Synthesis
All articles of this category The Horner-Wadsworth-Emmons reaction of the first, third and fourth generation of aldehyde terminated dendrimers 1-[Gn] ( n =1: 6 CHO, n =3:24 CHO, n =4:48 CHO groups, respectively) with phosphonates unsubstituted at the carbon α to the phosphoryl group 2a-i affords in moderate yield dend…
Chemical Synthesis and AnalysisDendrimers and Hyperbranched PolymersOrganophosphorus compounds synthesis
Boris Y. Shekunov、David Grant、R.J. Latham 等 4 位作者1997-10-01The Journal of Physical Chemistry B
The influence of p -acetoxyacetanilide (PAA) as an additive in the surrounding paracetamol solution was investigated during growth and dissolution of paracetamol crystals. The different crystal faces of paracetamol, {110}, {201̄}, and {001}, exhibited two different mechanisms of interaction with the additive. Accordin…
Crystallography and molecular interactionsSolidification and crystal growth phenomenaCrystallization and Solubility Studies
Naoki Kanda、M. Kawasaki、Toshikazu Kitajima 等 4 位作者1997-10-01Physical review. B, Condensed matter
We have developed a technique using laser-light scattering for monitoring and controlling precipitate formation during pulsed-laser deposition of ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ (YBCO) films. By laser ablating a stoichiometric YBCO target under o…
Physics of Superconductivity and MagnetismZnO doping and propertiesElectronic and Structural Properties of Oxides
M. Amparo F. Faustino、Maria G. P. M. S. Neves、M. Graça H. Vicente 等 7 位作者1997-10-01Photochemistry and Photobiology
Studies on the synthesis, preliminary in vivo biological activity, singlet oxygen and fluorescence yields of a dimeric porphyrin (D1) are described. The pharmacokinetic behavior and photodynamic properties of the dimer D1 were examined in Balb/c mice bearing an MS-2 fibrosarcoma. Compound D1 shows a high selectivity f…
Nanoplatforms for cancer theranosticsPorphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research Studies
James E. Charbonneau1997-10-01Scanning
Scanning electron microscopy (SEM) and x-ray microanalysis (EDS) were used to investigate stress corrosion cracking (SCC) in plain tinplate food cans, product discoloration, filiform corrosion, pitting/perforation corrosion, and loss of coating adhesion in enameled food cans. Intergranular SCC of uncoated tinplate occ…
Corrosion Behavior and InhibitionCultural Heritage Materials Analysis
Urša Opara Krašovec、Boris Orel、Stanko Hočevar 等 4 位作者1997-10-01Journal of The Electrochemical Society
Thin solid SnO 2 and SnO 2 / Mo (10%, 2:1 and 1:1) films with an ion‐storage capacity of 20 to 30 mC/cm 2 and weakly expressed cathodic electrochromism were deposited using the dip‐coating technique. The films were deposited from peroxo sols prepared by reacting SnCl 2 ⋅ 2 H 2 O and a metallic molybdenum precursor wit…
Gas Sensing Nanomaterials and SensorsConducting polymers and applicationsTransition Metal Oxide Nanomaterials
Hideo Fujikake、Kuniharu Takizawa、Hiroshi Kikuchi 等 6 位作者1997-10-01Japanese Journal of Applied Physics
A novel grayscale-memory ferroelectric liquid crystal device with polymer dispersion has been studied. The ferroelectric liquid crystal molecules are stabilized by a low-concentration doped polymer, which induces an enormous number of small liquid crystal domains with different threshold voltages for bistable switchin…
Liquid Crystal Research AdvancementsPhotorefractive and Nonlinear OpticsPhase-change materials and chalcogenides
Jose Antonio Celemaín、J.Y. Pastor、Javier LLorca 等 4 位作者1997-10-01Journal of the American Ceramic Society
Tensile and fracture tests were conducted at 20° and 1200°C on a ceramic‐matrix composite that was composed of an alumina (Al 2 O 3 ) matrix that was bidirectionally reinforced with 37 vol% silicon carbide (SiC) Nicalon fibers. The composite presented nonlinear behavior at both temperatures; however, the strength and…
Advanced ceramic materials synthesisInnovative concrete reinforcement materialsAluminum Alloys Composites Properties
Hongbo Huang、Wen‐Chin Chen、Chun-Ying Wu 等 7 位作者1997-10-01Protein Engineering Design and Selection
The propeptides of bacterial subtilisin BPN' and Carlsberg were synthesized to investigate their inhibitory function on the enzymes. Kinetically, pro-BPN' inhibits the proteolytic activities of subtilisin BPN' and Carlsberg separately in a slow binding mode. Pro-Carlsberg behaves as a typical rapid equilibrium competi…
Enzyme Structure and FunctionEnzyme Production and CharacterizationBiochemical and Structural Characterization
Martin Walker、T. Reiss、Sarp Adali1997-10-01Engineering Optimization
The optimal layup with least weight or cost for a symmetrically laminated plate subject to a buckling load is determined using a hybrid composite construction. A hybrid construction provides further tailoring capabilities and can meet the weight, cost and strength constraints while a non-hybrid construction may fail t…
Material Properties and Applications
Koichi Kusakabe、Katsunori Wakabayashi、Masatsura Igami 等 5 位作者1997-10-01Molecular 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
Magnetic structure is studied for several π-networks of graphite-like structures with edge and/or topological defects using the tight-binding model (the Hückel model). Zigzag-edged graphite have edge states, which form a partly flat band at the Fermi energy. Short range repulsion (the Hubbard U) is enough to induce hu…
Advancements in Battery MaterialsCarbon Nanotubes in CompositesGraphene research and applications
Volker Schädler、Ulrich Wiesner1997-10-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSalt-Controlled Lamellar Spacing in Ionically End-Capped Symmetric Diblock CopolymersVolker Schädler and Ulrich WiesnerView Author Information Max-Planck-Institut für Polymerforschung, Postfach 3148, D-55021 Mainz, Germany Cite this…
Theoretical and Computational PhysicsBlock Copolymer Self-AssemblyNanopore and Nanochannel Transport Studies
Gilles Castelein、G. Coulon、C. G’Sell1997-10-01Polymer Engineering and Science
Abstract Scanning force microscopy (SFM) was used to study the lamellar morphology of α and β spherulites in bulk intruded isotactic polypropylene (iPP) samples deformed under shear stress. The iPP specimens were sheared at a constant shear rate at room temperature. Just beyond yielding, at a shear strain level of 0.5…
Carbon Nanotubes in CompositesPolymer crystallization and propertiesPolymer Nanocomposites and Properties
Masatoshi Tosaka、Noritaka Hamada、Masaki Tsuji 等 4 位作者1997-10-01Macromolecules
Crystallization-temperature ( T c ) dependence of the probability of the presence of stacking faults, p, in the solution-grown β-form single crystal of syndiotactic polystyrene (s-PS) was analyzed on the basis of the growth theory of the polymer crystal. By comparing the experimentally obtained T c dependence of p wit…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties