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Raman spectroscopy of matrix-isolated antimony and bismuth clusters
A333 735
Surface Science 156 (1985) 735-740 North-Holland, Amsterdam EXPERIMENTS H. BURTSCHER
ON SMALL
PARTICLES
IN GAS SUSPENSION
a n d A. S C H M I D T - O T T
Laboratory for Solid State Physics, ETH, CH-8093 Zurich, Switzerland Received 9 August 1984 Gas suspension enables investigation of small particles free from interaction with surrounding media. Different methods for measuring photoemission from small particles in gas suspension and results obtained by them are reviewed as well as a method to obtain an estimate of the dispersion forces between small particles.
Surface Science 156 (1985) 741-750 North-Holland, Amsterdam OPTICAL
ABSORPTION
741 SPECTRA
OF
PAIRS
OF
SMALL
METAL
PARTICLES M. QUINTEN,
U. KREIBIG
a n d D. S C H O N A U E R
FBI 1- Physik, Universiti~t des Saarlandes, D- 6600 Saarbr~cken, Fed. Rep. of Germany and L. G E N Z E L
Max-Planck-lnstitut ff4r Festk~rperforschung, D-7700 Stuttgart, Fed. Rep. of Germany Received 14 August 1984 The influence of plasma resonance coupling in small Au particle pairs on their optical properties was calculated including retardation effects. The latter prove to be important for sizes above 15 nm. For pairs of smaller particles a MaxwelI-Garnett formula is derived and absorption spectra are calculated explicitly. Comparison with optical absorption spectra measured on aggregated Au particle hydrosols, gives good agreement concerning the splitting up of the dipolar single-particle plasma resonance band.
Surface Science 156 (1985) 751-755 North-Holland, Amsterdam RAMAN SPECTROSCOPY BISMUTH CLUSTERS B. E B E R L E , H. S O N T A G
751 OF MATRIX-ISOLATED
ANTIMONY
AND
a n d R. W E B E R
UniversitiJt Konstanz, Fakultf~t far Physik, Postfach 5560, D-7750 Konstanz, Fed. Red. of Germany Received 10 July 1984; accepted for publication 30 July 1984 Antimony and bismuth clusters isolated in rare-gas matrices were analyzed by Raman scattering. Dimers and tetramers were observed in agreemer, t with previous investigations. In addition, resonance Raman scattering from dimers in electronic excited states was observed. Larger clusters from both elements were prepared by matrix aggregation or by inert-gas condensation. These particles were also observed by Raman scattering. However, specific assignments could not be performed. Trimers of both elements were not observed.
Surface Science 156 (1985) 735-740 North-Holland, Amsterdam EXPERIMENTS H. BURTSCHER
ON SMALL
PARTICLES
IN GAS SUSPENSION
a n d A. S C H M I D T - O T T
Laboratory for Solid State Physics, ETH, CH-8093 Zurich, Switzerland Received 9 August 1984 Gas suspension enables investigation of small particles free from interaction with surrounding media. Different methods for measuring photoemission from small particles in gas suspension and results obtained by them are reviewed as well as a method to obtain an estimate of the dispersion forces between small particles.
Surface Science 156 (1985) 741-750 North-Holland, Amsterdam OPTICAL
ABSORPTION
741 SPECTRA
OF
PAIRS
OF
SMALL
METAL
PARTICLES M. QUINTEN,
U. KREIBIG
a n d D. S C H O N A U E R
FBI 1- Physik, Universiti~t des Saarlandes, D- 6600 Saarbr~cken, Fed. Rep. of Germany and L. G E N Z E L
Max-Planck-lnstitut ff4r Festk~rperforschung, D-7700 Stuttgart, Fed. Rep. of Germany Received 14 August 1984 The influence of plasma resonance coupling in small Au particle pairs on their optical properties was calculated including retardation effects. The latter prove to be important for sizes above 15 nm. For pairs of smaller particles a MaxwelI-Garnett formula is derived and absorption spectra are calculated explicitly. Comparison with optical absorption spectra measured on aggregated Au particle hydrosols, gives good agreement concerning the splitting up of the dipolar single-particle plasma resonance band.
Surface Science 156 (1985) 751-755 North-Holland, Amsterdam RAMAN SPECTROSCOPY BISMUTH CLUSTERS B. E B E R L E , H. S O N T A G
751 OF MATRIX-ISOLATED
ANTIMONY
AND
a n d R. W E B E R
UniversitiJt Konstanz, Fakultf~t far Physik, Postfach 5560, D-7750 Konstanz, Fed. Red. of Germany Received 10 July 1984; accepted for publication 30 July 1984 Antimony and bismuth clusters isolated in rare-gas matrices were analyzed by Raman scattering. Dimers and tetramers were observed in agreemer, t with previous investigations. In addition, resonance Raman scattering from dimers in electronic excited states was observed. Larger clusters from both elements were prepared by matrix aggregation or by inert-gas condensation. These particles were also observed by Raman scattering. However, specific assignments could not be performed. Trimers of both elements were not observed.