Farid El‐Tantawy、Nikolay Dishovsky2004-01-13Journal of Applied Polymer Science
Abstract The presentation of a new conductive composite with good effective applications like negative and positive temperature coefficient of conductivity thermistors (i.e., V‐shaped thermistors) and electromagnetic interference shielding effectiveness (EMI) was the aim of this study. The effect of boron carbide (B 4…
Ferroelectric and Piezoelectric MaterialsElectromagnetic wave absorption materialsDielectric materials and actuators
Il‐Soo Kim、Sang‐Hun Jeong、Sang Sub Kim 等 4 位作者2004-01-13Semiconductor Science and Technology
ZnO films were grown on sapphire substrates by rf magnetron sputtering and their structural and optical properties were characterized in detail. It was observed that high quality single crystal ZnO films are obtained when grown at high temperature (>600 °C) and low plasma power in oxygen-rich ambient. Films grown at 8…
ZnO doping and propertiesCopper-based nanomaterials and applicationsGa2O3 and related materials
A. Subramanian、Laurence D. Marks、Oliver Warschkow 等 4 位作者2004-01-13Physical Review Letters
Transmission electron diffraction (TED) combined with direct methods have been used to study the sqrt[3]xsqrt[3]R30 degrees reconstruction on the polar (111) surface of MgO and refine the valence charge distribution. The surface is nonstoichiometric and is terminated by a single magnesium atom. A charge-compensating e…
Advanced Chemical Physics StudiesPhysics of Superconductivity and MagnetismElectronic and Structural Properties of Oxides
M. Lejeune、M. Benlahsen、R. Bouzerar2004-01-13Applied Physics Letters
The correlation between the residual stress and the atomic-bond structure has been investigated in detail in hydrogenated amorphous films (a-C:H). The relaxation process was studied in relation with the Raman characteristics evolution and the induced metric distortions during growth. The analysis of the Raman data sho…
Metal and Thin Film MechanicsHigh-pressure geophysics and materialsDiamond and Carbon-based Materials Research
Cheol‐Woo Ahn、Sahn Nahm、Jungho Ryu 等 7 位作者2004-01-13Japanese Journal of Applied Physics
ZnO-added 0.41PNN–0.36PT–0.23PZ ceramics cannot be sintered below 950°C. However, when CuO is added, the liquid phase forms and specimens can be sintered even at 850°C. The dielectric constant ( ε T 3 / ε o ), piezoelectric constant ( d 33 ) and electromechanical coupling factor ( k p ) increase with the addition of C…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesDielectric materials and actuators
S. C. Lyu、Baolong Liu、Seng Hua Lee 等 7 位作者2004-01-13The Journal of Physical Chemistry B
High-quality single-walled carbon nanotubes (SWNTs) have been synthesized over Fe−Mo/MgO catalyst by catalytic decomposition of ethylene at 800 °C. The produced carbon material primarily consists of a SWNT bundle with few defects and a very small amount of amorphous carbon coating. The diameter of an individual SWNT i…
Advancements in Battery MaterialsCarbon Nanotubes in CompositesGraphene research and applications
Eugenio Coronado、José Ramón Galán‐Mascarós、Carlos Giménez‐Saiz 等 7 位作者2004-01-13Advanced Materials
The first hybrid radical salt of bis(ethylenedithio)tetrathiafulvalene (BEDT‐TTF) using a polyoxovanadate as the counterion, (BEDT‐TTF) 5 [H 3 V 10 O 28 ]·4H 2 O, has been obtained and characterized. It contains segregated mixed‐valence 2D stacks of organic radicals interleaved by anionic layers of [H 3 V 10 O 28 ] 3–…
Polyoxometalates: Synthesis and ApplicationsOrganic and Molecular Conductors ResearchVanadium and Halogenation Chemistry
Gang Xu、Ping Jin、Masato Tazawa 等 4 位作者2004-01-13Japanese Journal of Applied Physics
The difference in luminous transmittance (Δ T lum ) upon switching of VO 2 films strongly affects its solar controllability when used as a thermochromic window. It was found that Δ T lum is controllable by film thickness. Optical calculation for a VO 2 film on quartz glass revealed that the low-temperature semiconduct…
Thin-Film Transistor TechnologiesTransition Metal Oxide NanomaterialsGa2O3 and related materials
Yoshimichi Namai、Kenichi Fukui、Yasuhiro Iwasawa2004-01-13Nanotechnology
The adsorption and reaction of methanol (CH3OH) and nitrogen dioxide (NO2) on CeO2(111) surfaces in different oxidation states were studied by noncontact atomic force microscopy (NC-AFM). After CH3OH exposure, surface oxygen defects without reconstruction of the surrounding oxygen atoms were healed by methoxy species…
Catalytic Processes in Materials ScienceForce Microscopy Techniques and ApplicationsElectronic and Structural Properties of Oxides
Zhi‐Kang Xu、Qing-Wen Dai、Jian Wu 等 5 位作者2004-01-13Langmuir
A novel method for the surface modification of a microporous polypropylene membrane by tethering phospholipid analogous polymers (PAPs) is given, which includes the photoinduced graft polymerization of N,N-dimethylaminoethyl methacrylate (DMAEMA) and the ring-opening reaction of grafted poly-(DMAEMA) with 2-alkyloxy-2…
Membrane Separation TechnologiesRNA Interference and Gene DeliveryPolymer Surface Interaction Studies
Shun‐ichi Tamaru、Lianhe Yu、W. Justin Youngblood 等 6 位作者2004-01-13The Journal of Organic Chemistry
The acylation of dipyrromethanes to form 1,9-diacyldipyrromethanes is an essential step in the rational synthesis of porphyrins. Although several methods for acylation are available, purification is difficult because 1,9-diacyldipyrromethanes typically streak extensively upon chromatography and give amorphous powders…
Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent Materials
Sung Ho Jo、Yi Tu、Zhiwei Huang 等 7 位作者2004-01-13Applied Physics Letters
Two kinds of distinctive field emission behaviors were observed on vertically aligned multiwall carbon nanotube (CNT) films grown by hot filament dc-plasma enhanced chemical vapor deposition. Some samples have stable emission current for more than 60 h (type I), while others degrade substantially in the first 16 h (ty…
Carbon Nanotubes in CompositesGraphene research and applicationsDiamond and Carbon-based Materials Research
Yuichi Terazono、Gerdenis Kodis、Joakim Andréasson 等 10 位作者2004-01-13The Journal of Physical Chemistry B
A porphyrin (P) has been covalently linked to a photochromic dihydroindolizine moiety (DHI) to form a P-DHI dyad. When the dihydroindolizine is in its closed, spirocyclic form (DHIc), the photophysics of the attached porphyrin are unaffected. Irradiation with UV light opens the photochromic moiety to the betaine form…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesPhotochromic and Fluorescence Chemistry
Ephrem T. Hunde、James J. Watkins2004-01-13Chemistry of Materials
High-purity Co and Ni thin films were deposited directly onto the native oxide of Si wafers and onto TaN and TiN films supported on Si wafers by the hydrogen reduction of their respective metallocenes in supercritical CO 2 solution using a batch, cold-wall chemical fluid deposition (CFD) reactor. For Co deposition fro…
Catalytic Processes in Materials SciencePhase Equilibria and ThermodynamicsHigh-Temperature Coating Behaviors
Seongyop Lim、Seong‐Ho Yoon、Isao Mochida 等 4 位作者2004-01-13The Journal of Physical Chemistry B
Mechanical and chemical treatments were found to improve the graphitization extent of graphitized platelet carbon nanofiber, which showed little change in graphitization parameters of X-ray diffraction even after heat treatment at 2800 °C. Such treatments also restored the surface area that was significantly decreased…
Carbon Nanotubes in CompositesGraphene research and applicationsFiber-reinforced polymer composites
Michael J. Wiggins、Matt MacEwan、James M. Anderson 等 4 位作者2004-01-13Journal of Biomedical Materials Research Part A
The effect of soft-segment chemistry on biostability of polyurethane elastomers was studied with a diaphragm-type film specimen under conditions of static and dynamic loading. During testing, the films were exposed to an H(2)O(2)/CoCl(2) solution, which simulated the oxidative component of the in vivo environment. Fil…
Polymer composites and self-healingCarbon dioxide utilization in catalysisFree Radicals and Antioxidants
Soung‐Soo Yi、Jong‐Seong Bae、Kyoo Sung Shim 等 6 位作者2004-01-13Applied Physics Letters
Gd 2 O 3 : Eu 3+ and Li-doped Gd2O3:Eu3+ luminescent thin films have been grown on Al2O3 (0001) substrates using pulsed-laser deposition. The films grown under different deposition conditions show different microstructural and luminescent characteristics. Both cubic and monoclinic crystalline structures were observed…
Luminescence Properties of Advanced MaterialsSemiconductor materials and devicesSilicon Nanostructures and Photoluminescence
František Sehnal、Michal Žurovec2004-01-13Biomacromolecules
The formation and properties of lepidopteran silk fibers depend on amino acid repeats in the principal protein, heavy chain fibroin (H-fibroin). In H-fibroins of the "bombycoid" type, concatenations of alanine or of the GAGAGS crystalline motifs (1st tier repeats) and adjacent sequences breaking periodicity make 2nd t…
Neurobiology and Insect Physiology ResearchInsect and Arachnid Ecology and BehaviorSilk-based biomaterials and applications
Zheng Chen、Zhiwei Shan、Mao‐Sheng Cao 等 5 位作者2004-01-13Nanotechnology
The carrier gas flow rate, a key parameter for controlling the morphology and size in the synthesis of nanomaterials by thermal evaporation—vapour phase transport—condensation processes, can significantly affect the shape and size of the products. Besides nanoscale ZnO dendrites and wires, a uniform tetrapod-shaped Zn…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications
Baochang Cheng、Yanhe Xiao、Guosheng Wu 等 4 位作者2004-01-13Applied Physics Letters
Different morphological one-dimensional ZnO:Ce nanostructures were synthesized on a large scale. The microstructures and vibrational properties were investigated by x-ray diffraction, electron microscopy, Raman spectroscopy, and infrared spectroscopy. The results show that Ce can effectively control the growth of ZnO…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsGa2O3 and related materials