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Plasmon enhanced Raman from Ag nanopatterns made using periodically poled lithium niobate and periodically proton exchanged template methods
KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics.
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2012 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 116, no 50, 26543-26550 p.Article in journal (Refereed) Published
Abstract [en]

We study Ag nanopattern arrays formed using ferroelectric lithography based on two separate approaches, i.e., periodically poled lithium niobate (PPLN) and periodically proton exchanged (PPE) template methods. We demonstrate that such nanoarrays are plasmon active. Raman spectroscopy was applied to study molecular probe 4-aminothiophenol (4-ABT) absorbed onto a silver nanostructured array. The observed Raman spectra show peaks arising from b2 modes, which occur for plasmon enhanced Raman from 4-ABT in place of a1 modes, which occur in normal Raman scattering. We demonstrate that the PPLN and PPE substrates possess different plasmonic properties with PPE creating a stronger SERS signal relative to PPLN substrates.

Place, publisher, year, edition, pages
2012. Vol. 116, no 50, 26543-26550 p.
Keyword [en]
4-aminothiophenol, Molecular Probes, Nano pattern, Nanoarrays, Nanostructured arrays, Normal Raman scattering, Periodically poled lithium niobate, Plasmonic properties, Proton exchanged, Template methods
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-109451DOI: 10.1021/jp310248wISI: 000312519600049Scopus ID: 2-s2.0-84871580311OAI: oai:DiVA.org:kth-109451DiVA: diva2:582317
Funder
Swedish Research Council
Note

QC 20130124

Available from: 2013-01-04 Created: 2013-01-04 Last updated: 2017-12-06Bibliographically approved

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Gallo, Katia

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