Now showing items 31-40 of 855
1/f1∕f noise in gold nanoparticle chemosensors
(The American Institute of Physics, 2005-02-14)
We present a systematic study of low-frequency noise in Au nanoparticle chemosensors. All the sensors we have studied exhibit 1/f1∕f-type noise at low frequencies. The magnitude of the 1/f1∕f noise was smaller in devices ...
Modeling of anomalous electron mobility in Hall thrusters
(The American Institute of Physics, 2006-03)
Accurate modeling of the anomalous electron mobility is absolutely critical for successful simulation of Hall thrusters. In this work, existing computational models for the anomalous electron mobility are used to simulate ...
Top hat electrostatic analyzer for far-field electric propulsion plume diagnostics
(The American Institute of Physics, 2006-01)
The design, development, and testing of the top hat electric propulsion plume analyzer (TOPAZ) are presented for far-field electric propulsion plume diagnostics. The trend towards high-power thruster development will require ...
The effects of electrostatic forces on the distribution of drops in a channel flow: Two-dimensional oblate drops
(The American Institute of Physics, 2005-09)
Numerical simulations are used to examine the effect of an electrostatic field on an emulsion of drops in a channel. The leaky-dielectric theory of Taylor is used to find the electric field, the charge distribution on the ...
Shear softening and structure in a simulated three-dimensional binary glass
(The American Institute of Physics, 2005-04-15)
Three-dimensional model binary glasses produced by quenching from a range of liquid temperatures were tested in shear over a range of strain rates using molecular-dynamics techniques. Tests were performed under constant ...
DSMC Simulation of the Cometary Coma
(The American Institute of Physics, 2003-05-05)
The study of the comet coma, or its tenuous atmosphere, is a major space application of rarefied gas dynamics, which requires modeling the gas flow in a wide range of Knudsen number. For weak to moderate comets, only the ...
Topologic mixing on a microfluidic chip
(The American Institute of Physics, 2004-03-22)
Mixing two liquids on a microfluidic chip is notoriously hard because the small dimensions and velocities on the chip effectively prevent turbulence. We present a topological mixing scheme that exploits the laminarity of ...
Contact-line dynamics and damping for oscillating free surface flows
(The American Institute of Physics, 2004-03)
New experimental data on the frequency and damping of Faraday water waves in glass tanks are presented to demonstrate the contact-line effect on free surface flows. We find a complicated nonlinear relationship between wave ...
Evaluation of the fundamental properties of quantum dot infrared detectors
(The American Institute of Physics, 2002-04-01)
The physical properties of detectors based on intraband optical absorption in quantum dots is described and examined in the interest of providing a competitive alternative infrared (IR) detector technology. These quantum ...
On Travelling Waves for the Stochastic Fisher–Kolmogorov–Petrovsky–Piscunov Equation
(Kluwer Academic Publishers-Plenum Publishers; Springer Science+Business Media, Inc., 2005-08)
This paper is concerned with properties of the wave speed for the stochastically perturbed Fisher–Kolmogorov–Petrovsky–Piscunov (FKPP) equation. It was shown in the classical 1937 paper by Kolmogorov, Petrovsky and Piscunov ...