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Excited State Localization and Delocalization of Internal Charge Transfer in Branched Push−Pull Chromophores Studied by Single-Molecule Spectroscopy

Damir Aumiler、Sufan Wang、Xudong Chen 等 4 位作者2009-04-01Journal of the American Chemical Society

Single-molecule (SM) spectroscopy has been conducted to study exciton-like intramolecular charge transfer (ICT) coupling dynamics in two model dendritic systems containing branched ICT interactions. The strong coupling and stepwise photobleaching of the ICT branches in the dendrimers, which depend on the torsional dis…

Organic Electronics and PhotovoltaicsPorphyrin and Phthalocyanine ChemistryMolecular Junctions and Nanostructures

Composition−Structure−Property Relationships of 6H- and 12R-Type Hexagonal Ba(Mn,Ti)O3−δPerovskites

Laura Miranda、Antonio Feteira、Derek C. Sinclair 等 9 位作者2009-04-01Chemistry of Materials

The crystal structures of 6H-type BaMn 0.15 Ti 0.85 O 3, BaMn 1/4 Ti 3/4 O 2.95, and BaMn 1/2 Ti 1/2 O 2.84 and 12R-type BaMn 2/3 Ti 1/3 O 3 have been established by a combination of X-ray, neutron, and electron diffraction, and high-resolution electron microscopy. The 6H-type structure (space group P 6 3 / mmc ) can…

Ferroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materialsMultiferroics and related materials

Optical and Electrical Properties of Tin-Doped Cadmium Oxide Films Prepared by Electron Beam Technique

H.M. Ali、H. A. Mohamed、M.M. Wakkad 等 4 位作者2009-04-01Japanese Journal of Applied Physics

Tin-doped cadmium oxide films were deposited by electron beam evaporation technique. The structural, optical and electrical properties of the films were characterized. The X-ray diffraction (XRD) study reveals that the films are polycrystalline in nature. As composition and structure change due to the dopant ratio and…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications

Mechanoluminescence Recording Device Integrated with Photosensitive Material and Europium-Doped SrAl2O4

Nao Terasaki、Chao‐Nan Xu2009-04-01Japanese Journal of Applied Physics

An accumulative and integrative mechanoluminescence recording system consisting of a mechanoluminescent (ML) material and a photosensitive material was successfully demonstrated. The ML material developed in our laboratory is the world's first light-emitting material for practical use with the application of stress in…

Luminescence and Fluorescent Materialsbioluminescence and chemiluminescence researchPolydiacetylene-based materials and applications

The combined effect of static recrystallization and twinning on texture in magnesium alloys AM30 and AZ31

Étienne Martin、Lan Jiang、Stéphane Godet 等 4 位作者2009-04-01International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde)

Abstract The potential for decreasing the texture intensity generated during the bulk deformation of Mg alloys was investigated using a combination of contraction twinning, double (secondary) twinning and static recrystallization. A large number of twins was induced by tensile deformation at room temperature. Their vo…

Microstructure and mechanical propertiesMagnesium Alloys: Properties and ApplicationsAluminum Alloys Composites Properties

Nephrogenic systemic fibrosis with a spectrum of clinical and histopathological presentation: a disorder of aberrant dermal remodeling

April Deng、Donna Bilu Martin、Anne P. Spillane 等 10 位作者2009-04-01Journal of Cutaneous Pathology

BACKGROUND: Nephrogenic fibrosing dermopathy (NFD) has emerged as a clinicopathologic entity since 1997 and recently renamed as nephrogenic systemic fibrosis (NSF). The etiology and pathogenesis remain uncertain. Characteristic clinical presentation is described as diffuse thickening and hardening of the skin occurrin…

Luminescence Properties of Advanced MaterialsLanthanide and Transition Metal ComplexesInorganic Fluorides and Related Compounds

Epitaxial film growth and optoelectrical properties of layered semiconductors, LaMnXO (X=P, As, and Sb)

K. Kayanuma、Hidenori Hiramatsu、Toshio Kamiya 等 5 位作者2009-04-01Journal of Applied Physics

Thin films of LaMnXO (X=P, As, and Sb), which are isostructural compounds of the newly discovered superconductor, LaFeAsO, were grown epitaxially on MgO (001) substrates at ∼680 °C by pulsed laser deposition. Postdeposition thermal annealing at 1000 °C in evacuated silica glass ampoules improved the crystallinity and…

Magnetic and transport properties of perovskites and related materialsIron-based superconductors researchElectronic and Structural Properties of Oxides

Interlayer conformations of intercalated dodecyltrimethylammonium in rectorite as determined by FTIR, XRD, and TG analyses

Zhaohui Li、Wei‐Teh Jiang2009-04-01Clays and Clay Minerals

Abstract Intercalation of a wide variety of alkylammonium cations into the interlayer spaces of swelling clay minerals leads to many different applications, ranging from surface-charge measurements to rendering the clay compatible for the preparation of clay nanocomposites, but knowledge of the exact conformation of t…

Polymer Nanocomposites and PropertiesClay minerals and soil interactionsIron oxide chemistry and applications

Observation of high-temperature dynamic crossover in protein hydration water and its relation to reversible denaturation of lysozyme

Yang Zhang、Marco Lagi、Dazhi Liu 等 9 位作者2009-04-01The Journal of Chemical Physics

The diffusive dynamics of hydration water in lysozyme is studied by high-resolution incoherent quasielastic neutron scattering spectroscopy and molecular dynamics (MD) simulations in a temperature range of 290 K<T<380 K. The hydration level of the protein powder sample is kept at h=0.35 gram of water per gram of dry p…

Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesSpectroscopy and Quantum Chemical Studies

Conjugation of Monoclonal Antibodies to Super Paramagnetic Iron Oxide Nanoparticles for Detection of her2/neu Antigen on Breast Cancer Cell Lines.

Fereshteh Shamsipour、Amir‐Hassan Zarnani、Roya Ghods 等 10 位作者2009-04-01PubMed

Conjugation of monoclonal antibodies to super paramagnetic nanoparticles is an effective method for cancer diagnosis and treatment. In this study the humanized anti her2/neu monoclonal antibody- Herceptin- was conjugated to super paramagnetic iron oxide (SPIO) nanoparticles using EDC method. The concentration of the c…

Nanoparticle-Based Drug DeliveryAdvanced biosensing and bioanalysis techniquesMonoclonal and Polyclonal Antibodies Research

Tuning Morphologies and Field-Emission Properties of CuTCNQF4 and AgTCNQF4 Nanostructures

Canbin Ouyang、Yanbing Guo、Huibiao Liu 等 10 位作者2009-04-01The Journal of Physical Chemistry C

The organic charge-transfer (CT) complexes nanostructures of CuTCNQF 4 and AgTCNQF 4 (copper/silver tetrafluorotetracyanoquinodimethane) were successfully fabricated by organic solid-phase reaction. The morphologies of CuTCNQF 4 and AgTCNQF 4 nanostructures can be easily tuned by controlling the reaction temperature.…

Perovskite Materials and ApplicationsOrganic and Molecular Conductors ResearchElectronic and Structural Properties of Oxides

Luminescence peculiarities and optical properties of MgMoO4 and MgMoO4:Yb crystals

Д. А. Спасский、V. N. Kolobanov、V. V. Mikhaĭlin 等 6 位作者2009-04-01Optics and Spectroscopy

Magnesium molybdate is considered as a promising material for cryogenic scintillation bolometers. The luminescence properties of MgMoO 4 have been investigated on single crystals grown from melts of stoichiometric and nonstoichiometric compositions and on crystals doped with Yb 3+ ions. Their optical properties are in…

Luminescence Properties of Advanced MaterialsRadiation Detection and Scintillator TechnologiesAtomic and Subatomic Physics Research

Separation of Petroporphyrins from Asphaltenes by Chemical Modification and Selective Affinity Chromatography

Cindy-Xing Yin、Jeffrey M. Stryker、Murray R. Gray2009-04-01Energy & Fuels

Part of the metalloporphyrin fraction was separated from asphaltenes by a combination of reactive modification and affinity chromatography. The targeted vanadyl porphyrin complexes were modified by reaction with oxalyl chloride followed by a long chain alkylamine or perfluoroalkylaniline to produce an imido vanadium(I…

Porphyrin and Phthalocyanine ChemistryPetroleum Processing and AnalysisMetal-Catalyzed Oxygenation Mechanisms

Modeling semiconductor nanostructures thermal properties: The dispersion role

Damian Terris、Karl Joulain、Denis Lemonnier 等 4 位作者2009-04-01Journal of Applied Physics

We study heat transport in semiconductor nanostructures by solving the Boltzmann transport equation by means of the discrete ordinate method. Relaxation time and phase and group velocity spectral dependencies are taken into account. The Holland model of phonon relaxation time is revisited and recalculated from dispers…

Advanced Thermoelectric Materials and DevicesThermal properties of materialsThermal Radiation and Cooling Technologies

Inelastic heat fraction evaluation for engineering problems involving dynamic plastic localization phenomena

Patrice Longère、André Dragon2009-04-01Journal of mechanics of materials and structures

The evaluation of the temperature produced during adiabatic dissipative processes for a large class of engineering materials (metals and some polymers) remains a major subject of interest, notably in the fields of high-speed machining and impact dynamics.The hypothesis consisting in considering the proportion of plast…

Energetic Materials and CombustionHigh-Velocity Impact and Material BehaviorStructural Response to Dynamic Loads

Effect of pressure on the magnetocaloric properties of nickel-rich Ni–Mn–Ga Heusler alloys

Kalyan Mandal、Dulal Pal、N. Scheerbaum 等 5 位作者2009-04-01Journal of Applied Physics

Nickel-rich Ni–Mn–Ga Heusler alloys were prepared by arc melting and subsequent homogenization by annealing. A large magnetic entropy change was observed around 291 K in the alloy where martensite-austenite structural and ferro-para magnetic transitions almost coincide with each other. The effect of hydrostatic pressu…

Magnetic and transport properties of perovskites and related materialsShape Memory Alloy TransformationsHeusler alloys: electronic and magnetic properties

γ-Cyclodextrin-Directed Enantioselective Photocyclodimerization of Methyl 3-Methoxyl-2-naphthoate

Lin Luo、Gui‐Hong Liao、Xiaoling Wu 等 6 位作者2009-04-01The Journal of Organic Chemistry

Irradiation of methyl 3-methoxyl-2-naphthoate (2,3-NA) in methanol solution with light lambda > 280 nm produces anti-head-to-head cubane-like photocyclodimer 1 and [4+4] intermediate 2, which is, to the best of our knowledge, the first incidence of directly obtaining the intermediate in photocyclodimerization of napht…

Porphyrin and Phthalocyanine ChemistryPhotochromic and Fluorescence ChemistryMolecular spectroscopy and chirality

Fireproof Coatings on the Basis of Alkaline Aluminum Silicate Systems

P. Krivenkо、Ye.K. Pushkareva、M. V. Sukhanevich 等 4 位作者2009-04-01Ceramic engineering and science proceedings

This chapter contains sections titled: Abstract Introduction Theoretical Premises of the Research Results Conclusions References

Material Properties and ApplicationsMaterials Engineering and Processing

A Checklist of Diatoms from Inland Waters of the Northwestern United States

Loren L. Bahls2009-04-01Proceedings of the Academy of Natural Sciences of Philadelphia

A list of diatom taxa from inland waters of the northwestern United States is presented as a product of the author's bioassessment work over the last 40 years. The list is limited to taxa that have been identified from slides that are deposited in the Montana Diatom Collection. The list includes 1,348 species and infr…

Paleontology and Stratigraphy of FossilsDiatoms and Algae Research

Quantitative optical recognition of highly reproducible ultrathin oxide films in microelectrochemical anodization

Andrei Ionut Mardare、Achim Walter Hassel2009-04-01Review of Scientific Instruments

Automatized microelectrochemical investigations are achieved using a scanning droplet cell. The area reproducibility for a 100 mum oxide spot is found to be better than 1%, a value typically difficult to reach even in macroscopic samples. A systematic change in color appearance is seen for oxide films with a thickness…

Semiconductor materials and devicesAnalytical Chemistry and SensorsAnodic Oxide Films and Nanostructures