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Dynamics of O2 photodesorption from metal clusters: A significant difference from bulk behaviour
- Title
- Dynamics of O2 photodesorption from metal clusters: A significant difference from bulk behaviour
- Authors
- Niemietz M.; Koyasu K.; Gantefor G.; Kim Y.D.
- Ewha Authors
- 김영독
- SCOPUS Author ID
- 김영독
- Issue Date
- 2007
- Journal Title
- Chemical Physics Letters
- ISSN
- 0009-2614
- Citation
- Chemical Physics Letters vol. 438, no. 41370, pp. 263 - 267
- Indexed
- SCI; SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Photodesorption of O2 from size-selected Agn O2 - cluster anions with n = 2, 3, 4 and 8 was studied using time-resolved photoelectron spectroscopy (TR-PES). The spectra indicate that relaxations of photo-excited Agn O2 - clusters with n = even numbers accompany ultrafast direct O2 photodesorption. For the odd-numbered cluster Ag3 O2 -, in contrast, a long-lived excited state is observed, since O2 might be dissociatively chemisorbed, suppressing direct photodesorption of oxygen. Both, direct desorption and long-lived excited states, have not been observed from adsorbate covered metal surfaces, suggesting unique photochemical properties of such small clusters. © 2007 Elsevier B.V. All rights reserved.
- DOI
- 10.1016/j.cplett.2007.03.016
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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