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Proceedings Paper

SERS enhancement of Ag nanoparticle patterns embedded in glass by two-step ion exchange
Author(s): Lasse Karvonen; Ya Chen; Antti Säynätjoki; Ari Tervonen; Seppo Honkanen
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Paper Abstract

Silver nanoparticles embedded in glass are prepared by two different two-step ion exchange methods. In both of these methods, silver ions are introduced into glass in the first silver ion exchange step, but silver ions are reduced into metallic silver using two different second process steps: either post-annealing or subsequent potassium ion exchange. The formed particles are characterized by optical absorption measurements, scanning electron microscopy, transmission electron microscopy and atomic force microscopy. Their application in SERS is demonstrated, and the optimal surface features in terms of SERS enhancement are discussed. With post-annealing, high iron content in glass is needed to achieve high concentration of silver metal nanoclusters. Using double ion exchange, with the second step of potassium ion exchange, reduction of silver ions into metal nanoclusters occurs below aluminium mask. Using such mask, fabrication of silver nanoparticle patterns is also demonstrated.

Paper Details

Date Published: 6 February 2012
PDF: 10 pages
Proc. SPIE 8234, Plasmonics in Biology and Medicine IX, 823404 (6 February 2012); doi: 10.1117/12.908338
Show Author Affiliations
Lasse Karvonen, Aalto Univ. (Finland)
Ya Chen, Aalto Univ. (Finland)
Antti Säynätjoki, Aalto Univ. (Finland)
Ari Tervonen, Aalto Univ. (Finland)
Seppo Honkanen, Aalto Univ. (Finland)
Univ. of Eastern Finland (Finland)

Published in SPIE Proceedings Vol. 8234:
Plasmonics in Biology and Medicine IX
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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