Subhasis Panja、Umesh Kadhane、J. U. Andersen 等 12 位作者2007-09-24The Journal of Chemical Physics
We have developed an experimental technique that allows us to study the physics of short lived molecular dianions in the gas phase. It is based on the formation of monoanions via electrospray ionization, acceleration of these ions to keV energies, and subsequent electron capture in a sodium vapor cell. The dianions ar…
Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresPhotochemistry and Electron Transfer Studies
Ming Hu、Sergei Shenogin、Pawel Keblinski 等 4 位作者2007-09-24Applied Physics Letters
Using molecular dynamics simulations, we studied the air flow through carbon nanotube arrays. We found that for 1.4nm diameter tubes separated by 25nm, the air flow can be well described by the free molecular flow theory. We estimate that for such array, the pressure gradient is about 0.1atm∕μm at 1atm air pressure an…
Carbon Nanotubes in CompositesThermal properties of materialsThermal Radiation and Cooling Technologies
M. Müller、Janina Maultzsch、D. Wunderlich 等 5 位作者2007-09-24physica status solidi (b)
Abstract We present Raman spectroscopy on carbon nanotubes, functionalized with alkyl groups to different degrees and with different addition reactions. We observe effects in particular on the intensities of the radial breathing mode (RBM). From the RBM we can assign the diameter and chiral indices of the tubes and st…
Carbon Nanotubes in CompositesGraphene research and applications
Chang-Woo Sun、Min Soo Youm、Yong‐Tae Kim2007-09-24Journal of Physics Condensed Matter
We investigated the properties of a Ge–Bi–Te ternary chalcogenide thin film which was deposited on a SiO 2 /Si substrate by varying RF-sputtering power on the GeTe and Bi target. The aim was to search for an appropriate candidate for a new phase change memory. Various analyses are conducted in order to investigate the…
Liquid Crystal Research AdvancementsChalcogenide Semiconductor Thin FilmsPhase-change materials and chalcogenides
J. Mürbe、Jörg Töpfer2007-09-24International Journal of Applied Ceramic Technology
Mg–Cu–Zn ferrites can be sintered at T ≤950°C to sufficient density and display adequate permeability profiles for application in multilayer ferrite inductors. The permeability and Curie temperature have to be optimized by proper selection of composition. Ferrites with <50 mol% Fe 2 O 3 reveal enhanced densificatio…
Advancements in Battery MaterialsMagnetic Properties and Synthesis of FerritesElectromagnetic wave absorption materials
Chaoying Wan、Wei Dong、Yinxi Zhang 等 4 位作者2007-09-24Journal of Applied Polymer Science
Abstract The intercalation process and microstructural development of polybutadiene rubber (BR)/clay nanocomposites cured with sulfur were systematically investigated with respect to the organic modifier (primary and quaternary ammonium compounds) of the clay. X‐ray diffraction spectra were recorded at various stages…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesTribology and Wear Analysis
Manu Jaiswal、Wei Wang、K. A. Shiral Fernando 等 5 位作者2007-09-24Journal of Physics Condensed Matter
We report the electric-field effects and magnetotransport in transparent networks of single-wall carbon nanotubes (SWNT). The temperature dependence of conductance of the network indicates a 2D Mott variable-range hopping (VRH) transport mechanism. Electric field and temperature are shown to have similar effects on th…
Carbon Nanotubes in CompositesGraphene research and applicationsQuantum and electron transport phenomena
Junzhan Zhang、Yongdong Xu、Litong Zhang 等 4 位作者2007-09-24International Journal of Applied Ceramic Technology
Carbon fiber‐reinforced silicon carbide matrix composites (C/C‐SiC) have received considerable attentions because of their superior friction and wear behaviors. In this paper, C/C‐SiC composites were fabricated by the reaction melt infiltration method, and the braking performance, the microstructure of friction surfac…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesAdvanced materials and composites
Shinsuke Takeoka、Koichiro Morita、Youichi Mizuno 等 4 位作者2007-09-24Ferroelectrics
To avoid the influence of spontaneous polarization, thermally stimulated current (TSC) measurements of BaTiO3-based multilayer ceramic capacitors with Ni internal electrodes were performed within the paraelectric phase. We observed two TSC peaks and inferred that one of them was related to the resistance degradation a…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesElectrical and Thermal Properties of Materials
Oliver Köster‐Scherger、Herbert Schmid、Nicole Vanderschaeghe 等 5 位作者2007-09-24Journal of the American Ceramic Society
Zinc oxide (ZnO) crystals with additions of iron (III) oxide exhibit a characteristic inversion domain microstructure with domain boundaries on two different habit planes: parallel to {0001} basal planes and parallel to {2 1 1 5} pyramidal planes of ZnO. The structural inversion of the domains is proved by electron di…
ZnO doping and propertiesMultiferroics and related materialsCopper-based nanomaterials and applications
Jianhui Zhang、Huaiyong Liu、Zhenlin Wang 等 4 位作者2007-09-24Applied Physics Letters
High purity (∼88%) gold nanobelts have been synthesized in the water/polyvinylpyrrolidone (PVP)/n-pentanol system created to realize the selective-adsorption of PVP on Au which directs Au to grow in belt form via the one-dimensional (1D) self-assembly of triangular Au nanoplates. These nanobelts present uniform thickn…
Nanoparticle-Based Drug DeliveryGold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon Research
Mark A. Schaffer、Kimberley B. McAuley、E. Keith Marchildon 等 4 位作者2007-09-24Macromolecular Reaction Engineering
Abstract An experimental investigation of nonoxidative thermal degradation kinetics of nylon 66 melt under high temperature (280–300 °C) and low water content (0.02–0.14 wt.‐%) conditions is presented. Experimental data for the time evolution of polymer end‐group concentrations and degradation‐product generation rates…
Polymer crystallization and propertiesMachine Learning in Materials ScienceThermal and Kinetic Analysis
Amal Elzubair、Claudia Maria Chagas Bonelli、João Carlos Miguez Suarez 等 4 位作者2007-09-24Journal of Natural Fibers
For the purpose of evaluating the suitability of piassava fiber as reinforcement of polymer matrix (recycled polyethylene), we carried out extensive characterization of morphological, structural, thermal, and mechanical properties of two species of piassava fibers, namely Leopoldinia piassaba (Amazon, Brazil) and Atta…
Natural Fiber Reinforced CompositesAdvanced Cellulose Research StudiesElectrospun Nanofibers in Biomedical Applications
Aljoscha Roch、O. Jost、B. Schultrich 等 4 位作者2007-09-24physica status solidi (b)
Abstract This contribution deals with the synthesis of Single‐Walled Carbon Canotubes (SWCNT) with a novel pulsed arc‐discharge technique. Pulsed arc‐discharge is a very interesting technique because it is similar to the well‐known laser evaporation technique for the synthesis of SWCNT and should allow a scale‐up to r…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Eero Willman、F.A. Fernández、Richard James 等 4 位作者2007-09-24IEEE Transactions on Electron Devices
The anisotropic anchoring effect of a treated solid surface on a nematic liquid crystal is described in the Landau-de Gennes theory using a power expansion on the tensor-order parameter and two mutually orthogonal unit vectors. The expression has three degrees of freedom, allowing for independent assignment of polar a…
Liquid Crystal Research AdvancementsAdvanced Materials and MechanicsPlant Reproductive Biology
Zhijun Lin、Meishuan Li、Jingyang Wang 等 4 位作者2007-09-24Journal of the American Ceramic Society
A Cr–Al–C composite was successfully synthesized by a hot‐pressing method using Cr, Al, and graphite as starting materials. X‐ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses revealed that the composite contained Cr 2 AlC, AlCr 2 , Al 8 Cr 5 , and Cr 7 C 3 . The orientation…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesMXene and MAX Phase Materials
T. Bonaedy、Y. S. Koo、K. D. Sung 等 4 位作者2007-09-24Applied Physics Letters
We have systematically investigated the magnetodielectric property of polycrystalline γ-Fe2O3. The dielectric constants of γ-Fe2O3 seem to follow the Maxwell-Wagner model, i.e., their large enhancement and strong temperature and frequency dependences. Positive magnetodielectric property is observed with negative magne…
Geophysical and Geoelectrical MethodsMultiferroics and related materialsIron oxide chemistry and applications
Enrico Perfetto、J. González、F. Guinea 等 5 位作者2007-09-24Physical Review B
We develop a long-wavelength approximation in order to describe the low-energy states of carbon nanotubes in a transverse magnetic field. We show that in the limit where the square of the magnetic length $l=\sqrt{\ensuremath{\hbar}c∕eB}$ is much larger than the C-C distance times the nanotube radius $R$, the low-energ…
Graphene research and applicationsQuantum and electron transport phenomenaTopological Materials and Phenomena
R. Maaß、S. Van Petegem、Daniel Grolimund 等 5 位作者2007-09-24Applied Physics Letters
In situ white beam Laue diffraction experiments on focused ion beam machined single crystal 10μm Ni pillars are performed to explore the relation between the initial and evolving microstructures and the subsequent flow response. The pillar has a flow stress that is at least in the upper bound of the scatter of the flo…
Microstructure and mechanical propertiesAdvanced Electron Microscopy Techniques and ApplicationsNanoporous metals and alloys
Ming Li、Antonio Feteira、Derek C. Sinclair 等 4 位作者2007-09-24Applied Physics Letters
Mn-doped CaCu3Ti4O12 ceramics with nominal composition CaCu2.85Mn0.15Ti4O12 (CCMTO) have been prepared and their radio- and micro-wave dielectric properties established. At 300 K, dense CCMTO ceramics have appreciable grain resistivity, ∼20MΩcm, and exhibit microwave dielectric resonance with εr∼93, Qf∼3950GHz (at 3.9…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisDielectric properties of ceramics