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Laser‐deposited silver island films: an investigation of their structure, optical properties and SERS activity
Author(s) -
Vogel E.,
Kiefer W.,
Deckert V.,
Zeisel D.
Publication year - 1998
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199808)29:8<693::aid-jrs283>3.0.co;2-o
Subject(s) - raman spectroscopy , crystal violet , materials science , annealing (glass) , laser , raman scattering , coalescence (physics) , x ray photoelectron spectroscopy , molecule , absorption spectroscopy , nanotechnology , chemistry , analytical chemistry (journal) , optics , chemical engineering , composite material , medicine , physics , organic chemistry , pathology , chromatography , astrobiology , engineering
Silver island films prepared by pulsed laser deposition were tested as substrates for surface enhanced raman spectroscopy. They exhibit a position‐dependent thickness and SERS activity distribution. Cresyl Violet and Crystal Violet were chosen as test molecules. The annealing of the films leads to coalescence of the initial island structures and the development of longer ellipsoidal particles, which generally improves the enhancement properties of the substrates. The dimensions of the surface structures depend on the local initial film thickness. The changes in the island shape and dimensions manifest themselves in changes in the absorption spectra. © 1998 John Wiley & Sons, Ltd.