High-Performance Biosensing Using Arrays of Plasmonic NanotubesVisa övriga samt affilieringar
2010 (Engelska)Ingår i: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 4, nr 4, s. 2210-2216Artikel i tidskrift (Refereegranskat) 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.
Ort, förlag, år, upplaga, sidor
American Chemical Society , 2010. Vol. 4, nr 4, s. 2210-2216
Nyckelord [en]
gold nanotubes; array; LSPR; label-free biosensing; plasmonic; metamaterial; finite element simulation
Nationell ämneskategori
Biofysik
Identifikatorer
URN: urn:nbn:se:liu:diva-118826DOI: 10.1021/nn9015828ISI: 000276956800055PubMedID: 20218668OAI: oai:DiVA.org:liu-118826DiVA, id: diva2:817144
Anmärkning
Funding Agencies|Engineering and Physical Sciences Research Council (UK); Swedish Research Council; Swedish Strategic Research Foundation
2015-06-042015-06-042017-12-04