Control of nanoparticle aggregation in aerogel hosts

Michael D W Grogan, S C Heck, L M Xiao, R England, S A Maier, Timothy A Birks

Research output: Contribution to journalArticle

7 Citations (Scopus)
144 Downloads (Pure)

Abstract

Plasmonic aerogel containing 50 nm gold nanoparticles is made using a modified 2-step method that maintains control over the gel time while preventing nanoparticle aggregation. Strong narrow surface plasmon resonances verify that the nanoparticles are well dispersed within the silica matrix, and enable applications in sensing. SERS, nonlinear optics or plasmonic gain. Discrepancies between measured and simulated resonance wavelengths are attributed to the breakdown of the effective index approximation, due to the short-scale penetration of the resonance electric field into the host medium.
Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume358
Issue number2
DOIs
Publication statusPublished - 15 Jan 2012

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