Probing the 2D to 3D structural transition in gold cluster anions using argon tagging

Different physisorption properties by 2D and 3D isomers of Au_{n};{-} clusters are observed and used to probe the 2D to 3D structural transition. Strong Ar clustering occurs on planar Au_{n};{-} and the planar faces of the pyramidal Au20-. An abrupt change of Ar clustering at Au12- confirms the 2D t...

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Bibliographic Details
Published in:Physical review letters 2009-04, Vol.102 (15), p.153401-153401, Article 153401
Main Authors: Huang, Wei, Wang, Lai-Sheng
Format: Article
Language:English
Subjects:
active gold
GOLD
ISOMERS
MATERIALS SCIENCE
metal clusters
MICROSTRUCTURE
MOLECULAR CLUSTERS
nanoclusters
oxidation
PHASE TRANSFORMATIONS
photoelectron-spectroscopy
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Summary:Different physisorption properties by 2D and 3D isomers of Au_{n};{-} clusters are observed and used to probe the 2D to 3D structural transition. Strong Ar clustering occurs on planar Au_{n};{-} and the planar faces of the pyramidal Au20-. An abrupt change of Ar clustering at Au12- confirms the 2D to 3D structural transition at this size, where both isomers coexist. The minor 2D isomer can be titrated out by Ar to produce a clean 3D-Au12- beam and beams of Au_{12}Ar_{m};{-} with enhanced 2D isomers. Using the Ar titration and tagging, isomer-specific photoelectron spectra for the 2D and 3D Au12- are obtained.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.102.153401