Results 271 to 280 of about 235,108 (305)

Low density GaAs∕AlGaAs quantum dots grown by modified droplet epitaxy

Journal of Applied Physics, 2004
Low temperature photoluminescence spectroscopy is used to analyze the effects of the Ga coverage and of the postgrowth thermal annealing on the electronic properties of low density (≈1×109cm−2) self-assembled GaAs∕AlGaAs quantum dots (QDs) grown by modified droplet epitaxy (MDE).
Mantovani, V, SANGUINETTI, STEFANO, GUZZI, MARIO, GRILLI, EMANUELE ENRICO, Gurioli, M, Watanabe, K, Koguchi, N.   +6 more
openaire   +2 more sources

Maximum-density-droplet formation in hard-wall quantum dots

Physica E: Low-dimensional Systems and Nanostructures, 2004
We study the effects of an external magnetic field on hard-wall quantum dots of various geometries by using the spin-density-functional theory. Starting from the single-electron spectra, we study the role of interactions by examining the spin development as a function of the magnetic field strength. The chemical potentials of the fully polarized states
E. Räsänen, M.J. Puska, R.M. Nieminen
openaire   +1 more source

Laserdeposition of YBa2Cu3O7 films with low droplet densities

1992
Pulsed laser deposition is a very successful method of preparing thin films of high-temperature superconductors with optimum electrical properties. For multilayer systems in superconductor electronics very smooth surfaces are required. In order to achieve such films that are free of pinholes, droplets and outgrowths, the surface morphology on (100) MgO
M. Schilling, F. Goerke, U. Merkt
openaire   +1 more source

Vapour density field of a population of cloud droplets

Journal of Atmospheric and Solar-Terrestrial Physics, 2011
The idea that a cluster of droplets evaporates in times longer than a single droplet and that the droplets near the edge of the cluster evaporate most rapidly is based on observational evidence. In this work, we use a theoretical model based on the electrostatic-image-charge method to calculate the vapour density field for a cloud of monodisperse cloud
Nesvit E. Castellano, Eldo E. Ávila
openaire   +1 more source

The one-body density matrix in Helium droplets

Journal of Low Temperature Physics, 1993
The growth of the Bose condensate in Helium droplets is studied through variational Monte Carlo calculations of the one-body density matrix. Both the off-diagonal and the l=0 component of the one-body density matrix show unmistakable finite range ordering within the core of the droplet.
openaire   +1 more source

On-chip high density droplet-on-template (DOT) array

Journal of Micromechanics and Microengineering, 2014
In this report, we present a new method for generating a high-density (2D) droplet array using double-layered polydimethylsiloxane (PDMS) templates containing honeycomb microwells. Without external flow control, a droplet-on-template (DOT) was created by utilizing capillary forces associated with the interfacial tension between the aqueous and oil ...
Jitae Kim, Simon Song
openaire   +1 more source

Size and density control of In droplets at near room temperatures

Nanotechnology, 2009
We report on the ability to control the size and density of In droplets on GaAs(100) substrates at near room temperatures using solid source molecular beam epitaxy. We specifically demonstrate the height, diameter and density control of In droplets as functions of substrate temperature (T(sub)) and monolayer (ML) coverage.
J H, Lee, Zh M, Wang, N Y, Kim, G J, Salamo   +3 more
openaire   +2 more sources

Probability density function modeling of evaporating droplets dispersed in isotropic turbulence

39th Aerospace Sciences Meeting and Exhibit, 2001
In this paper, we use a statistical closure scheme to obtain an approximate equation for probability density function (pdf) to predict the statistical properties of interest of collisionless evaporating droplets suspended in isothermal isotropic turbulent flows.
R. V. R. Pandya, F. Mashayek
openaire   +1 more source

The sedimenting-droplet procedure for measuring fluid densitles

Analytical Biochemistry, 1980
Abstract An apparatus is described which is used for the determination of velocities of falling droplets of small volumes (5 μl) through hydrophobic mixtures. From calibration curves with sodium chloride solutions of different molarities and specific gravities, the densities of the fluid in the droplets were obtained by interpolation.
A, Polson, H, Alk, K, Achtleitner
openaire   +2 more sources

Laser deposition of epitaxial YBa2Cu3O7 films with low droplet densities

Thin Solid Films, 1993
Abstract A KrF excimer laser is used for the growth of smooth YBa 2 Cu 3 O 7 films using the laser deposition method. The most important parameters in this process are investigated, in order to obtain films with low droplet densities. We report on the experimental set-up, on the parameters of the ablation process and on the growth conditions with ...
M. Schilling, F. Goerke, U. Merkt
openaire   +1 more source