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A thermal plasmonic sensor platform: resistive heating of nanohole arrays.
Chalmers University of Technology, Sweden.ORCID iD: 0000-0002-4437-6291
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2014 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 14, no 6, 3544-3549 p.Article in journal (Refereed) Published
Abstract [en]

We have created a simple and efficient thermal plasmonic sensor platform by letting a DC current heat plasmonic nanohole arrays. The sensor can be used to determine thermodynamic parameters in addition to monitoring molecular reactions in real-time. As an application example, we use the thermal sensor to determine the kinetics and activation energy for desorption of thiol monolayers on gold. Further, the temperature of the metal can be measured optically by the spectral shift of the bonding surface plasmon mode (0.015 nm/K). We show that this resonance shift is caused by thermal lattice expansion, which reduces the plasma frequency of the metal. The sensor is also used to determine the thin film thermal expansion coefficient through a theoretical model for the expected resonance shift.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2014. Vol. 14, no 6, 3544-3549 p.
Keyword [en]
Plasmon, nanohole, gold, temperature, current, thermal expansion
National Category
Atom and Molecular Physics and Optics Nano Technology
Research subject
Physics
Identifiers
URN: urn:nbn:se:kth:diva-197579DOI: 10.1021/nl5011542ISI: 000337337100088PubMedID: 24807397Scopus ID: 2-s2.0-84902261811OAI: oai:DiVA.org:kth-197579DiVA: diva2:1165978
Funder
Knut and Alice Wallenberg FoundationSwedish Research CouncilSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme
Note

QC 20171214

Available from: 2017-12-14 Created: 2017-12-14 Last updated: 2017-12-14Bibliographically approved

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  • apa
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  • modern-language-association-8th-edition
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  • de-DE
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Output format
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