Results 241 to 250 of about 2,982 (265)

Reflectance anisotropy spectroscopy of oriented films of semiconducting polymers

The Journal of Chemical Physics, 2000
We present reflectance anisotropy spectroscopy (RAS) data for aligned films of luminescent conjugated polymers. Ultrathin films (5–10 nm) spin-cast onto friction-deposited poly-tetrafluoroethylene (PTFE) show birefringence and dichroism indicating alignment of the polymer chains with the PTFE axis.
E. K. Miller, K. Hingerl, C. J. Brabec, A. J. Heeger, N. S. Sariciftci   +4 more
openaire   +1 more source

Reflection anisotropy spectroscopy of molecular assembly at metal surfaces

Thin Solid Films, 2004
Abstract Reflection anisotropy spectroscopy (RAS) is a non-destructive optical probe of surfaces capable of operation within ultra-high vacuum and liquid environments. The RAS technique has been used to investigate the behaviour of surface electronic states on clean metal surfaces including energy shifts, depopulation and quantum confinement. RAS has
D.S. Martin, P. Weightman
openaire   +1 more source

Reflectance anisotropy spectroscopy and the growth of low-dimensional materials

Thin Solid Films, 1998
Reflectance anisotropy spectroscopy (RAS) has proved itself to be extremely sensitive to both surface reconstruction and ultrathin coverages of material on semiconductor surfaces. This in situ technique therefore lends itself to monitoring the formation of low-dimensional systems in a wide range of growth environments.
Z Sobiesierski, D.I Westwood
openaire   +1 more source

Model for the effects of surface disorder on reflectance anisotropy spectroscopy

Physical Review B, 2003
We present a simple model for surface disordering and study its consequences on reflectance anisotropy spectroscopy (RAS). Large unit cells are taken as a basis to introduce disorder by means of displacing the atoms from their equilibrium positions. Different displacement schemes are employed and ensemble averages are calculated in order to study the ...
Bernardo S. Mendoza, Norbert Esser, Wolfgang Richter   +2 more
openaire   +1 more source

Monohydride Formation on Vicinal Si(001) Investigated by Reflectance Anisotropy Spectroscopy

physica status solidi (a), 1999
We report reflectance anisotropy spectroscopy (RAS) results for the controlled dosing of atomic hydrogen onto a clean 3 offcut Si(001)±(1 2) sample, cut so as to expose a single domain under ultra-high vacuum (UHV) conditions. Upon dosing approximately 0.8 monolayers of atomic hydrogen onto this surface at room temperature, followed by annealing, large
J. Power, W. Richter, M. Palummo, G. Onida, R. Del Sole   +4 more
openaire   +2 more sources

Optical spectroscopy of semiconductor surfaces: From differential reflectivity to reflection anisotropy spectroscopy (personal and subjective notes)

Il Nuovo Cimento D, 1998
An historical review of the development of optical spectroscopy of surface states in semiconductors is presented. The importance of symmetry considerations and of polarization properties is emphasized.
openaire   +1 more source

Monitoring of (reactive) ion etching (RIE) with reflectance anisotropy spectroscopy (RAS) equipment

Applied Surface Science, 2015
Lars Barzen, Henning Fouckhardt
exaly  

Investigation of electromechanical distortions in gallium nitride by reflectance anisotropy spectroscopy

Diamond and Related Materials, 2000
T B Joyce, Paul R Chalker
exaly  

Orientation of Molecular Adsorbates from Reflection Anisotropy Spectroscopy

physica status solidi (a), 1998
R.J. Cole, B.G. Frederick, J.R. Power, C.C. Perry, Q. Chen, C. Verdozzi, N.V. Richardson, P. Weightman   +7 more
openaire   +1 more source

Reflectance anisotropy spectroscopy assessment of the MOVPE nucleation of GaInP on germanium (1 0 0)

Journal of Crystal Growth, 2011
Enrique Barrigón, B Galiana, Ignacio Rey-Stolle   +2 more
exaly