Daisuke Kawakami、Christian Bürger、Shaofeng Ran 等 9 位作者2008-03-26Macromolecules
An in situ study of structure formation in amorphous poly(ethylene terephthalate) (PET) during uniaxial stretching at a temperature 30 °C above glass transition temperature was carried out using synchrotron small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD) techniques. Three major deformation-…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Elizabeth J. Opila、Michael C. Halbig2008-03-26Ceramic engineering and science proceedings
In this paper the oxidation behavior of ZrB2–20 vol% SiC is examined. Samples were exposed in stagnant air in a zirconia furnace (Deltech, Inc.) at temperatures of 1327, 1627, and 1927°C for ten ten-minute cycles. Samples were removed from the furnace after one, five, and ten cycles. Oxidized material was characterize…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesMXene and MAX Phase Materials
Denise Wilson、S. L. Lieder、D. C. Lueneburg2008-03-26Ceramic engineering and science proceedings
The high temperature tensile strength and creep properties of Nextel 720 were measured in the temperature range 1000°C — 1300°C. The creep rate for the Nextel 720 fibers was three orders of magnitude less than single phase polycrystalline alumina fibers such as Nextel 610, and 85% of room tensile strength was retained…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesIntermetallics and Advanced Alloy Properties
Manoj K. Singh、Hyun M. Jang、Himanshu Gupta 等 4 位作者2008-03-26Journal of Raman Spectroscopy
Abstract The first‐ and second‐order Raman‐active phonons in the orthorhombic Pbnm NdFeO 3 single crystals were studied by means of polarized Raman scattering and lattice dynamics computations (LDC). The zone‐center phonons of A g symmetry were distinguished from the B 1 g eigenmodes by performing polarized Raman scat…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Hua Lin、Martin Sherburn、Jonathan Crookston 等 6 位作者2008-03-26Modelling and Simulation in Materials Science and Engineering
The mechanical behaviour of woven fabric under compression is investigated using 3D finite element analysis in conjunction with a nonlinear mechanical model for the yarn. The FE model captures the main fabric compression response, including geometric and material nonlinearities, yarn interactions and hysteresis. It is…
Mechanical Behavior of CompositesTextile materials and evaluationsStructural Analysis and Optimization
Jonathan Lipowitz、James A. Rabe、Avigdor Zangvil 等 4 位作者2008-03-26Ceramic engineering and science proceedings
Silicon carbide fiber is a stoichiometric, submicrometer polycrystalline β-SiC fiber in tow form, which also contains 3 wt% crystalline titanium diboride. The ∼0.05 m̈m TiB2 crystallites are found primarily at triple points of the 0.1 to 0.5 m̈m β-SiC crystallites. The latter contain considerable twinning and stacking…
Advanced ceramic materials synthesisSilicon Carbide Semiconductor TechnologiesAdvanced materials and composites
Walter Krenkel2008-03-26Ceramic engineering and science proceedings
High performance ceramics are still largely produced via powder routes. The main disadvantage of these monolithic materials is their brittle failure behaviour and the thus dissatisfactory damage tolerance of ceramic components. The most favourable way to improve the fracture toughness of ceramics is the reinforcement…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesInnovations in Concrete and Construction Materials
David B. Marshall、Brian N. Cox2008-03-26Annual Review of Materials Research
A new paradigm for ceramic composite structural components enables functionality in heat exchange, transpiration, detailed shape, and thermal strain management that significantly exceeds the prior art. The paradigm is based on the use of three-dimensional fiber reinforcement that is tailored to the specific shape, str…
Advanced ceramic materials synthesisAdditive Manufacturing and 3D Printing TechnologiesFire effects on concrete materials
Miladin Radović、Edgar Lara‐Curzio、Rosa Trejo 等 5 位作者2008-03-26Ceramic engineering and science proceedings
The thermal diffusivity, heat capacity, thermal conductivity, coefficient of thermal expansion and elastic properties of Ni-YSZ and YSZ are reported in the temperature interval between 20 °C and 1000 °C. Specific heat capacity (Cp) and thermal diffusivity (α) were determined by differential scanning calorimetry (DSC)…
Advancements in Solid Oxide Fuel CellsHigh-Temperature Coating BehaviorsElectronic and Structural Properties of Oxides
James R. Maiolo、Harry A. Atwater、Nathan S. Lewis2008-03-26The Journal of Physical Chemistry C
Macroporous silicon samples have been investigated in photoelectrochemical cells, and their behavior has been compared to that of conventional, planar, Si/liquid junctions. The liquid electrolyte junction provided a conformal contact to the macroporous Si and allowed assessment of the trade-offs between increased surf…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsSemiconductor materials and interfaces
Vitor M. Zamarion、Ronaldo Adriano Timm、Koiti Araki 等 4 位作者2008-03-26Inorganic Chemistry
Trimercaptotriazine-modified gold nanoparticles exhibit strong SERS effects, yielding vibrational profiles very sensitive to the presence of heavy metal ions. Because of the contrasting response observed for selected vibrational bands in the SERS profiles, they provide useful nanoprobes for Hg2+ and Cd2+ ions, allowin…
Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesNanocluster Synthesis and Applications
Daravong Soulivong、Sébastien Norsic、Mostafa Taoufik 等 7 位作者2008-03-26Journal of the American Chemical Society
Silica-supported tantalum hydride, (SiO)2Ta-H (1), proves to be the first single-site catalyst for the direct non-oxidative coupling transformation of methane into ethane and hydrogen at moderate temperatures, with a high selectivity (>98%). The reaction likely involves the tantalum-methyl-methylidene species as a key…
Catalytic Processes in Materials ScienceCatalysts for Methane ReformingCatalysis and Oxidation Reactions
Hangjun Ding、Jiaoyan Shen、Meixiang Wan 等 4 位作者2008-03-26Macromolecular Chemistry and Physics
Abstract PANI nanotubes with diameters of 100–150 nm with conductivities of single nanotubes as high as 30.6 S · cm −1 were directly oxidized with APS in the absence of hard templates and acidic dopants. The high conductivity was shown to result from protons produced during the polymerization. The pH decreases with in…
Electrochemical sensors and biosensorsAdvanced Sensor and Energy Harvesting MaterialsConducting polymers and applications
Wenyong Lin、Andrew A. Herzing、Christopher J. Kiely 等 4 位作者2008-03-26The Journal of Physical Chemistry C
The strength of PtOx−support and Pt−support interactions was investigated for supported PtOx/SiO 2, PtOx/Al 2 O 3, and PtOx/CeO 2 catalysts with time-resolved in situ Raman/IR spectroscopy and scanning transmission electron microscopy (STEM). Raman spectroscopy (and STEM−X-ray energy-dispersive spectoscopy, XEDS) was…
Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Justyn Jaworski、Digvijay Raorane、Jin Hoe Huh 等 5 位作者2008-03-26Langmuir
Susceptibility of chemical sensors to false positive signals remains a common drawback due to insufficient sensor coating selectivity. By mimicking biology, we have demonstrated the use of sequence-specific biopolymers to generate highly selective receptors for trinitrotoluene and 2,4-dinitrotoluene. Using mutational…
Mass Spectrometry Techniques and ApplicationsDiatoms and Algae ResearchCephalopods and Marine Biology
Stacy E. Snyder、Slava V. Rotkin2008-03-26arXiv
High intrinsic mobility and small, biologically-compatible size make single-walled carbon nanotubes (SWNTs) in demand for the next generation of electronic devices. Further, the wide range of available bandgaps due to changes in diameter and symmetry give SWNTs greater versatility than traditional semiconductors. Sing…
Materials Science
Hua-Yun Geng、Ying Chen、Yasunori Kaneta 等 6 位作者2008-03-26Physical Review B
A comprehensive investigation on point defects and their clustering behavior in nonstoichiometric uranium dioxide $\mathrm{U}{\mathrm{O}}_{2\ifmmode\pm\else\textpm\fi{}x}$ is carried out using the $\mathrm{LSDA}+\mathrm{U}$ method based on density functional theory. Accurate energetic information and charge transfers…
Nuclear reactor physics and engineeringRadioactive element chemistry and processingNuclear Materials and Properties
Michael P. Surh、Jess B. Sturgeon、Wilhelm G. Wolfer2008-03-26arXiv
A novel computational treatment of dense, stiff, coupled reaction rate equations is introduced to study the nucleation, growth, and possible coalescence of cavities during neutron irradiation of metals. Radiation damage is modeled by the creation of Frenkel pair defects and helium impurity atoms. A multi-dimensional c…
Materials Science
Dipti Banerjee2008-03-26arXiv
In this letter we have pointed out that frustration in spin glass is realized through the Berry phase due to the conflict between the spin ordering in the course of parallel transport of spinor. We have came to the point that the Berry phase depicting the chiral change of helicity of a quantized spinor is prominent on…
Mesoscale and Nanoscale PhysicsMaterials Science
Alexander A. Tsirlin、R. Nath、C. Geibel 等 4 位作者2008-03-26Physical Review B
Magnetic properties of the silver vanadium phosphate ${\mathrm{Ag}}_{2}\mathrm{V}\mathrm{O}{\mathrm{P}}_{2}{\mathrm{O}}_{7}$ are studied by means of magnetic susceptibility measurements and electronic structure calculations. In spite of the layered crystal structure suggesting one-dimensional or two-dimensional magnet…
Crystal Structures and PropertiesPolyoxometalates: Synthesis and ApplicationsAdvanced Condensed Matter Physics