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Now showing items 31-40 of 48
Silver Nanowire Networks as Flexible, Transparent, Conducting Films: Extremely High DC to Optical Conductivity Ratios
(2009)
We have used aqueous dispersions of silver nanowires to prepare thin, flexible, transparent, conducting films. The nanowires are of length and diameter close to 6.5 ?m and 85 nm respectively. At low thickness, the films ...
Switching a single spin on metal surfaces: ab initio studies
(2009)
The exchange coupling between single
3
d
magnetic adatoms (Cr, Mn, Fe, and Co) adsorbed on a
Cu(001) surface and a Cr STM tip is studied with
ab initio
calculations. We demonstrate that the spin
direction of single ...
Using surface and interface optics to probe the capping, with amorphous Si, of Au atom chains grown on vicinal Si(111)
(2009)
The distinct optical signatures of aligned single and double Au atom chain structures, grown on vicinal Si(111) substrates, have been identified using reflectance anisotropy spectroscopy (RAS). Deposition of 0.04 monolayers ...
Nonequilibrium Green's function study of Pd4-cluster-functionalized carbon nanotubes as hydrogen sensors
(2009)
Pd-cluster-functionalized carbon nanotubes
CNTs
have been shown experimentally to be effective hydro-
gen sensors. Semiconducting CNTs exhibit much higher sensitivity than ensemble
mixed
ones. Using the
nonequilibrium ...
Upper bound for the conductivity of nanotube networks
(2009)
Films composed of nanotube networks have their conductivities regulated by the junction resistances formed between tubes. Conductivity values are enhanced by lower junction resistances but should reach a maximum that is ...
Predicting d0 magnetism: Self-interaction correction scheme
(2008)
Predicting magnetism originating from 2p orbitals is a delicate problem, which depends on the subtle interplay between covalency and Hund?s coupling. Calculations based on density-functional theory and the local spin-density ...
Foam as a complex system
(2009)
What is a `complex system?? The two-dimensional foam, as originally popularized by Cyril
Stanley Smith, provides an ideal context in which to explore this question.
Resonant electronic states and I-V curves of Fe/MgO/Fe(100) tunnel junctions
(2009)
The bias dependence of the tunnel magnetoresistance
TMR
of Fe/MgO/Fe tunnel junctions is investigated
theoretically with a fully self-consistent scheme that combines the nonequilibrium Green?s-function method
with ...
Strain relaxation in Fe3O4/MgAl2O4 heterostructures: Mechanism for formation of antiphase boundaries in an epitaxial system with identical symmetries of film and substrate
(2009)
Strain relaxation studies in epitaxial magnetite, Fe3O4, thin films grown on MgAl2O4 100 substrates are
reported. The study shows that the films were relaxed in line with the theoretical model prediction with a
critical ...
Two-photon absorption generated by optically amplified signals
(2008)
Two-photon absorption generated by band-limited amplified spontaneous emission noise was found to be twice that generated by a continuous-wave optical signal with the same average power. A simple formula for describing the ...