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High-Performance Biosensing Using Arrays of Plasmonic Nanotubes
Queens University of Belfast, North Ireland.
Queens University of Belfast, North Ireland.
Department of Applied Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.ORCID iD: 0000-0002-3002-3639
Queens University of Belfast, North Ireland.
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2010 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 4, no 4, 2210-2216 p.Article in journal (Refereed) Published
Abstract [en]

We show that aligned gold nanotube arrays capable of supporting plasmonic resonances can be used as high performance refractive index sensors in biomolecular binding reactions. A methodology to examine the sensing ability of the inside and outside walls of the nanotube structures is presented. The sensitivity of the plasmonic nanotubes is found to increase as the nanotube walls are exposed, and the sensing characteristic of the inside and outside walls is shown to be different. Finite element simulations showed good qualitative agreement with the observed behavior. Free standing gold nanotubes displayed bulk sensitivities in the region of 250 nm per refractive index unit and a signal-to-noise ratio better than 1000 upon protein binding which is highly competitive with state-of-the-art label-free sensors.

Place, publisher, year, edition, pages
American Chemical Society , 2010. Vol. 4, no 4, 2210-2216 p.
Keyword [en]
gold nanotubes; array; LSPR; label-free biosensing; plasmonic; metamaterial; finite element simulation
National Category
URN: urn:nbn:se:liu:diva-118826DOI: 10.1021/nn9015828ISI: 000276956800055PubMedID: 20218668OAI: diva2:817144

Funding Agencies|Engineering and Physical Sciences Research Council (UK); Swedish Research Council; Swedish Strategic Research Foundation

Available from: 2015-06-04 Created: 2015-06-04 Last updated: 2015-06-18

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Jonsson, Magnus P.
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