Low-temperature resonance Raman scattering from iodide adsorbed on nanostructured silver surfaces

Journal Article · Thu Dec 24 04:00:00 EST 1998 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

DOI:https://doi.org/10.1021/jp982523n· OSTI ID:315997

Chumanov, G; Sibbald, M S; Cotton, T M ^[1]

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1. Ames Lab., IA (United States)

An overtone progression was observed in Raman scattering spectra from iodide-modified, electrochemically roughened silver surfaces at low temperatures. Spectral intensities of the bands were found to vary with the degree of surface roughening, whereas vibrational frequencies remained highly conserved. Both surface-enhanced and resonance scattering phenomena contribute to observed band intensities when excited in the spectral region between 406 and 415 nm. It is suggested that the progression originates from I{sub 2}-like species that are formed on small silver clusters at low temperatures under irradiation. This complex can be viewed as a supermolecule in which the electronic resonance is determined by the size of the cluster and I-I stretch represents a normal mode of the molecule.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 315997
• Journal Information: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 52 Vol. 102; ISSN 1089-5647; ISSN JPCBFK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IODIDES
IRRADIATION
LASERS
MICROSTRUCTURE
RAMAN SPECTROSCOPY
RESONANCE SCATTERING
ROUGHNESS
SILVER
SURFACES