Creation of CsAu nanoclusters by UV‐light irradiation on CsBr:Au –  crystals | Zendy

Kawai Taketoshi | Zendy; Yamano Asuka | Zendy

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Creation of CsAu nanoclusters by UV‐light irradiation on CsBr:Au – crystals

Author(s) -

Kawai Taketoshi,

Yamano Asuka

Publication year - 2006

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200541314

Subject(s) - irradiation , absorption (acoustics) , monomer , nanoclusters , ion , absorption spectroscopy , chemistry , halide , absorption band , ultraviolet , alkali metal , photochemistry , analytical chemistry (journal) , materials science , inorganic chemistry , optics , optoelectronics , physics , organic chemistry , nuclear physics , composite material , polymer , chromatography

We have investigated the optical absorption spectra of the CsBr:Au – crystals irradiated with an ultraviolet (UV) light. Before the UV‐light irradiation, the absorption bands associated with the isolated Au – ion (monomer) are observed in the energy region of UV. After a slight UV‐light irradiation, the absorption intensities of the monomer bands decrease and the absorption bands due to paired Au – ions appear around the monomer bands. Furthermore, UV‐light irradiation on the CsBr:Au – crystals brings about the appearance of several new absorption bands in the visible region. From the analogy with the aggregation of the F centers in alkali halide crystals, the new absorption bands are attributed to the aggregate centers of the Au – ions. They can also be regarded as the CsAu nanocluster constructed from the Cs + cations and the Au – anions. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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