Materials Literature
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Tungsten trioxide adopts a variety of structures which can be intercalated with charged species to alter the electronic properties, thus forming ``tungsten bronzes.'' Similar effects are observed upon removing oxygen from $\mathrm{W}{\mathrm{O}}_{3}$. We present a computational study of cubic and hexagonal alkali bron…
Nb-doped SrTiO$_{3}$ epitaxial thin films have been prepared on (001) SrTiO$_{3}$ substrates using pulsed laser deposition. A high substrate temperature ($>1000^{\circ}{C}$) was found to be necessary to achieve 2-dimensional growth. Atomic force microscopy reveals atomically flat surfaces with 3.9 Å$ $ steps. The film…
The properties of antiferromagnetic ferromagnetic bilayer have been studied using self-consistent mean-field approximation for Heisenberg Hamiltonian. The perpendicular exchange coupling has been revealed in a bilayer with a compensated interface. For a uniform antiferromagnetic film a symmetrical hysteresis loop has…
We demonstrate that surface plasmon polaritons can be guided by nanometer scale dielectric waveguides. In a test experiment plasmons were coupled to a curved 3 micrometer radius dielectric stripe, which was 200 nm wide and 138 nm thick using a parabolic surface coupler. This experiment demonstrates that using surface…
A modification of the Frenkel-Kontorova model is presented in which particles are allowed to move in the vertical direction. This model is used to study the formation of islands for a monolayer of 1D interfaces and the corresponding roughness transition. Both analytical and numerical approaches are employed, and the n…
Solution NMR studies of biomolecules are typically limited by the molecules' molecular weight. Here we report strategies based on the use of highly deuterated, methyl‐protonated proteins that facilitate both structural and motional studies of molecules on the order of 100 kDa. Approaches and concepts are illustrated w…
We present an in-depth analysis of the atomic and electronic structure of the quasi one-dimensional (1D) surface reconstruction of Ga on Si(112) based on Scanning Tunneling Microscopy and Spectroscopy (STM and STS), Rutherford Backscattering Spectrometry (RBS) and Density Functional Theory (DFT) calculations. A new st…
We report the development of room-temperature ferromagnetism in chemically synthesized powder samples of ${\mathrm{Sn}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{O}}_{2}$ $(0.005\ensuremath{\leqslant}x\ensuremath{\leqslant}0.05)$ and paramagnetic behavior in an identically synthesized set of ${\mathrm{Sn}}_{1\ensure…
We present numerical simulations of gold nanowires under tensile loading at various strain rates and wire sizes at room temperature. The simulations were performed using molecular dynamics modeling the gold nanowires using various forms of the embedded-atom method, and concentrated on investigating the yield and fract…
It won't stick! Aligned carbon nanotube films were used as templates in the dip coating of polymers for biomedical applications. The resulting nanostructured polymeric surfaces have excellent anti-adhesion to blood platelets, good blood compatibility, and superhydrophobicity. The SEM image shows the side view of a fil…
Abstract The present review discusses the most important aspects to take into consideration to improve the properties of γ‐Al 2 O 3 as a support for catalytic applications. We show that the synthetic route to γ‐Al 2 O 3 is the starting point that determines the micro‐ and macrostructure of the oxide and, consequently,…
Although the thermal properties of millimeter-sized carbon nanotube mats and packed carbon nanofibers have been readily measured, measurements for a single nanotube are extremely difficult. Here, we report a novel method that can reliably measure the thermal conductivity of a single carbon nanotube using a suspended s…
Synthetic fibres are more susceptible to thermal damage and have to be processed at lower spindle speeds than cotton on ring spinning machines. Blends of polyester-cotton were spun using ring spinning machine at various spindle speeds. Analysis of the properties of the yarns and the fibres in the yarn revealed that sp…
Adsorption, desorption and migration of platinum and nickel on a passive carrier—graphite monolayer on rhenium—is studied. It is found that on this surface, platinum and nickel exist in two phases: in the form of physisorbed atoms and in close packed islands. The kinetics of growth and dissolution of platinum islands…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
Article Stress-Strain Behavior of Polyethylene Terephthalate) (PET) During Large Plastic Deformation by Plane Strain Compression. Part II: The Stress-Strain Temperature (SST) Superposition Principle was published on August 1, 2005 in the journal Journal of Polymer Engineering (volume 25, issue 5).
De-vulcanization of vulcanized elastomers represents a great challenge because of their three-dimensional network structure. Sulfur-cured gum natural rubbers containing three different sulfur/accelerator ratios were de-vulcanized by thio-acids. The process was carried out at 90 °C for 10 minutes in an open two-roll cr…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
Functionally graded materials are a new and attractive class of materials incorporating an engineered spatial variation in composition and/or microstructure: this idea has immediately revealed successful since it allows to reach peculiar mechanical properties such as resistance to wear and contact damage. As a matter…
Cadmium Telluride: Iodine nanoparticle thin films were prepared by spraying iodine doped CdTe nanoparticles dispersed in 1-Butanol, on the glass substrates kept at 200°C for 20 min. Iodine doped CdTe nanoparticles had been prepared by adding trace amounts of Iodine powder in addition to stoichiometric ratios of Cd and…