Thermo-optoplasmonic single-molecule sensing on optical microcavities
dc.contributor.author | Toropov, NA | |
dc.contributor.author | Houghton, MC | |
dc.contributor.author | Yu, D | |
dc.contributor.author | Vollmer, F | |
dc.date.accessioned | 2024-06-27T14:18:37Z | |
dc.date.issued | 2024-06-26 | |
dc.date.updated | 2024-06-27T13:17:52Z | |
dc.description.abstract | Whispering-gallery-mode (WGM) resonators are powerful instruments for single-molecule sensing in biological and biochemical investigations. WGM sensors leveraged by plasmonic nanostructures, known as optoplasmonic sensors, provide sensitivity down to single atomic ions. In this article, we describe that the response of optoplasmonic sensors upon the attachment of single protein molecules strongly depends on the intensity of WGM. At low intensity, protein binding causes red shifts of WGM resonance wavelengths, known as the reactive sensing mechanism. By contrast, blue shifts are obtained at high intensities, which we explain as thermo-optoplasmonic (TOP) sensing, where molecules transform absorbed WGM radiation into heat. To support our conclusions, we experimentally investigated seven molecules and complexes; we observed blue shifts for dye molecules, amino acids, and anomalous absorption of enzymes in the near-infrared spectral region. As an example of an application, we propose a physical model of TOP sensing that can be used for the development of single-molecule absorption spectrometers. | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.description.sponsorship | Biotechnology and Biological Sciences Research Council (BBSRC) | en_GB |
dc.identifier.citation | Published online 26 June 2024 | en_GB |
dc.identifier.doi | https://doi.org/10.1021/acsnano.4c00877 | |
dc.identifier.grantnumber | EP/T002875/1 | en_GB |
dc.identifier.grantnumber | BB/T008741/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/136482 | |
dc.identifier | ORCID: 0000-0001-7570-6348 (Houghton, Matthew C) | |
dc.identifier | ORCID: 0000-0003-0565-4671 (Vollmer, Frank) | |
dc.language.iso | en | en_GB |
dc.publisher | American Chemical Society (ACS) | en_GB |
dc.rights | © 2024 The Authors. Open access. Published by American Chemical Society. This publication is licensed under CC-BY 4.0. | en_GB |
dc.subject | microresonator | en_GB |
dc.subject | plasmon | en_GB |
dc.subject | protein | en_GB |
dc.subject | tryptophan | en_GB |
dc.subject | sensor | en_GB |
dc.subject | absorption | en_GB |
dc.title | Thermo-optoplasmonic single-molecule sensing on optical microcavities | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2024-06-27T14:18:37Z | |
dc.identifier.issn | 1936-0851 | |
dc.description | This is the final version. Available on open access from the American Chemical Society via the DOI in this record | en_GB |
dc.identifier.eissn | 1936-086X | |
dc.identifier.journal | ACS Nano | en_GB |
dc.relation.ispartof | ACS Nano | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2024-06-14 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2024-06-26 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2024-06-27T14:15:47Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2024-06-27T14:18:42Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2024-06-26 |
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Except where otherwise noted, this item's licence is described as © 2024 The Authors. Open access. Published by American Chemical Society. This publication is licensed under CC-BY 4.0.