Cluster in Kontakt mit Oberflächen: Elektronenstruktur und Magnetismus I


Photoactivated fluorescence has been recently produced upon visible illumination of silver oxide films.It is assumed that the silver nanoclusters being photochemically generated from the silver oxide are responsible for this finding. Such newly identified properties of nanoparticles open the possibility to photochemically control their fluorescent spectral features. Agn photoproduction from silver oxide might be utilized in optical storage materials to write data. Observed strong size dependent fluorescence in small Ag clusters produced by silver oxide represents a potential for parallel readout and increased storage capacity due to the possibility of color mixing from different cluster sizes. The mechanisms responsible for these phenomena are not known. The goal of this project is to find mechanisms controlling the multicolored fluorscent Ag nanocluster creation from silver oxides based on ab initio theoretical approach.


Principal Investigators
Bonacic-Koutecky, Vlasta Prof. i. R. Dr. rer. nat. (Details) (Physical and Theoretical Chemistry I)

Duration of Project
Start date: 10/2003
End date: 06/2007

Research Areas
supported clusters, optical storage, stimulated and spontanuous emission

Publications

V. Bonacic--Koutecky, J. Pittner, M. Boiron, P. Fantucci: "An accurate relativistic effective--core--potential for excited states of Ag--atom; Application to study of the absorption spectra of Ag_n and Ag_n+ clusters'', J. Chem. Phys. 110, 3876-3886 (1999).



V. Bonacic--Koutecky, M. Boiron J. Pittner, P. Fantucci, J. Koutecky: "Structural and optical properties of small oxygen doped and pure silver clusters'', Eur. Phys. J. D 9, 183-187 (1999).



V. Bonacic--Koutecky, V. Veyret, R. Mitric: "Ab initio study of the absorption spectra of Ag_n (n=5-8) clusters'', J. Chem. Phys., 115, 10450-10460 (2001).



Ch. Sieber, J. Buttet, W. Harbich, Ch. Felix, R. Mitric, V. Bonacic--Koutecky: ''Isomer selective spectroscopy on small metal clusters illustrated on Ag_9; Experiment and Theory, Phys. Rev. Letters, submitted.


Last updated on 2020-10-03 at 16:40