Materials Literature
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We present simulations of field emission from bundles of metallic (5,5) carbon nanotubes, which are either ideally open or closed. The scattering calculations are achieved using a transfer-matrix methodology for consideration of three-dimensional aspects of both the emitting structure and the surface barrier. Band-str…
Abstract Giant and stable wormlike micelles formed in water from a series of poly(ethylene oxide) (PEO)‐based diblock copolymer amphiphiles mimicked the flexibility of various cytoskeletal filaments. The worm diameter ( d ) was found by cryo‐transmission electron microscopy to scale with the length of the hydrophobic…
High molecular weight phthalazinone containing poly(arylene ether)s, poly(arylene thioether)s, and poly(arylene sulfone)s with very high glass transition temperatures were synthesized from a series of new bisphthalazinone monomers. Bisphthalazinone monomers 7a − c and 8c were synthesized from 2-(4-chlorobenzoyl)benzoi…
This paper reviews recent investigations of the electronic structure and the optical properties of intercalated single-wall carbon nanotubes (SWCNTs) and C 60 filled SWCNTs (peapods) using electron energy-loss spectroscopy (EELS) in transmission as a probe. The results from these one-dimensional nanostructures are com…
Abstract The nonlinear conduction behavior of composite materials of foliated graphite nanosheets and nylon‐6 subjected to a variable direct‐current electric field has been studied. Corresponding to the onset of the nonlinearity, there is a crossover current density/electric field (or current–voltage) couple. The curr…
Temperature−composition values of liquid−solid equilibrium were measured calorimetrically and tabulated for 10 binary solutions of these 5 organic carbonates: ethylene carbonate, propylene carbonate, dimethyl carbonate, ethyl methyl carbonate, and diethyl carbonate. Further, heat capacity ( C p ) and temperature ( T m…
Abstract We propose a new method for constructing kinetic response surfaces used in the development and optimization of gas‐phase and surface reaction kinetic models. The method, termed as the sensitivity analysis based (SAB) method, is based on a multivariate Taylor expansion of model response with respect to model p…
We analyze the static and dynamical properties of cooperative two-step spin-crossover solids adopting an Ising-like model where the states $+1$ and $\ensuremath{-}1$ represent the high-spin (HS) state and the low-spin (LS) state, respectively. The model consists of two equivalent sublattices with a ``ferro'' intrasubl…
This study determined the effect of water storage on flexural strength (FS) and compressive strength (CS) of 12 luting cements from different material classes. In addition, the influence of the curing method on the mechanical properties was investigated. The materials examined were two zinc phosphate cements (Harvard…
Deformed single-wall carbon nanotubes (SWCNT) are investigated through ab initio simulations as sensors to detect the presence of chemical gases. Although the viability of using undeformed SWCNT devices has been demonstrated for many molecules, there are important exceptions of toxic gases, such as carbon monoxide, wh…
For a model glass former we demonstrate via computer simulations how macroscopic dynamic quantities can be inferred from a potential energy landscape (PEL) analysis. The essential step is to consider whole superstructures of many PEL minima, called metabasins, rather than single minima. We show that two types of metab…
By means of layer resolved ion irradiation the mechanisms involved in the irradiation driven modifications of the exchange bias effect in NiFe/FeMn bilayers have been investigated. It is shown that not only the locations of the defects but also the magnetic coupling between both layers during the irradiation process i…
This paper seeks to synthesize much recent work on the HTSC materials around the latest energy resolved scanning tunnelling microscopy (STM) results from Davis and coworkers. The STM conductance diffuse scattering results in particular are employed as point of entry to discuss bosonic modes, both of condensed and unco…
We provide new data on current-driven switching in Permalloy (Py = Ni84Fe16) based nanopillars at room temperature and 4.2K that confirm and extend previously published work. We present data for both uncoupled and antiferromagnetically coupled samples. The latter confirm prior results for Co/Cu/Co. We show that insert…
Heterostructured metal−semiconductor Zn−ZnO core−shell nanobelts and nanotubes have been synthesized. The core is a belt-shaped Zn single crystal, and the shell is an epitaxially grown ZnO layer of ∼5 nm in thickness. The composite nanobelt grows along [21̄1̄0], its top/bottom being ±(0001), and side surfaces ±(011̄0)…
Abstract Electrospinning of cellulose acetate (CA) in a new solvent system and the deacetylation of the resulting ultrafine CA fibers were investigated. Ultrafine CA fibers (∼2.3 μm) were successfully prepared via electrospinning of CA in a mixed solvent of acetone/water at water contents of 10–15 wt %, and more ultra…
Abstract The melting and crystallization behavior of poly( L ‐lactic acid) (PLLA; weight‐average molecular weight = 3 × 10 5 ) was studied with differential scanning calorimetry (DSC). DSC curves for PLLA samples were obtained at various cooling rates (CRs) from the melt (210 °C). The peak crystallization temperature…
Abstract The present study was aimed at examining the effect of modes of rolling and subsequent annealing on yield locus anisotropy and its dependence on microstructure and texture. The materials, pure Cu, Cu(Cr) alloy and Cu(P) alloy, have been subjected to equal amount of cold rolling reductions by unidirectional, t…
Article Crystal structure of terbium sulfate octahydrate, Tb2(SO4)3 · 8H2O, and of dysprosium sulfate octahydrate, Dy2(So4)3 · 8H20 was published on December 1, 2003 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 218, issue JG).
The structure characterization and dielectric properties were studiedfor a series of copper-doped calcium titanates, Ca100-x Cux TiO3, wherex =[Cu/(Cu+Ca)]% = 0.5, 1.0, 3.0 and 5.0, prepared by the conventional solidstate reaction method. X-ray diffraction analyses indicate that all samplesbelong to the orthorhombic s…