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New type of paramagnetic silver clusters in sodalite: Ag8n+
|Jaroslaw Sadlo 1, Jacek Michalik 1, Hirohisa Yamada 2, Yuichi Michiue 2|
1. Institute of Nuclear Chemistry and Technology (IChTJ), Dorodna 16, Warszawa 03-195, Poland
Metal clusters exhibit novel electronic, optical and chemical properties owing to quantum size effect. Small cationic silver clusters have been efficiently stabilized in zeolites after hydrogen or gamma irradiation reduction. Depending on their framework structure, cation capacity and water presence zeolites offer possibility to stabilize silver clusters with different size and charge. They can be formed in two different agglomeration pathways. In the first one the agglomeration is radiation-induced process initiated by Ag0 atoms and following by the reactions of Ag+ cations with Ag0 and later with Ag2+ and Ag32+ clusters during gradual thermal annealing. Finally Ag43+ tetramers are formed and it was postulated that they are located in octagonal prisms of zeolite rho structure.
Presentation: poster at E-MRS Fall Meeting 2003, Symposium F, by Jaroslaw Sadlo
See On-line Journal of E-MRS Fall Meeting 2003
Submitted: 2003-05-27 13:35 Revised: 2009-06-08 12:55