Asymmetric split H-shape nanoantennas for molecular sensing

I.G. Mbomson, S. Tabor, B. Lahiri, G. Sharpe, S.G. McMeekin, R.M. De La Rue, N.P. Johnson

    Research output: Contribution to journalArticle

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    Abstract

    In this paper we report on a very sensitive biosensor based on gold asymmetric nanoantennas that are capable of enhancing the molecular resonances of C-H bonds. The nanoantennas are arranged as arrays of asymmetric-split H-shape (ASH) structures, tuned to produce plasmonic resonances with reflectance double peaks within the mid-infrared vibrational resonances of C-H bonds for the assay of deposited films of the molecule 17ß- estradiol (E2), used as an analyte. Measurements and numerical simulations of the reflectance spectra have enabled an estimated enhancement factor on the order of 105 to be obtained for a thin film of E2 on the ASH array. A high sensitivity value of 2335 nm/RIU was achieved, together with a figure of merit of approximately 8. Our experimental results were corroborated using numerical simulations for the C-H stretch vibrational resonances from the analyte, superimposed on the plasmonic resonances of the ASH nanoantennas.
    Original languageEnglish
    Pages (from-to)395-406
    Number of pages10
    JournalBiomedical Optics Express
    Volume8
    Issue number1
    Early online date21 Dec 2016
    DOIs
    Publication statusPublished - Jan 2017

    Fingerprint

    Biosensing Techniques
    Gold
    Estradiol
    reflectance
    bioinstrumentation
    figure of merit
    simulation
    gold
    augmentation
    sensitivity
    thin films
    molecules

    Keywords

    • biosensor
    • nanoantennas
    • molecular resonances

    Cite this

    Mbomson, I. G., Tabor, S., Lahiri, B., Sharpe, G., McMeekin, S. G., De La Rue, R. M., & Johnson, N. P. (2017). Asymmetric split H-shape nanoantennas for molecular sensing. Biomedical Optics Express, 8(1), 395-406. https://doi.org/10.1364/BOE.8.000395
    Mbomson, I.G. ; Tabor, S. ; Lahiri, B. ; Sharpe, G. ; McMeekin, S.G. ; De La Rue, R.M. ; Johnson, N.P. / Asymmetric split H-shape nanoantennas for molecular sensing. In: Biomedical Optics Express. 2017 ; Vol. 8, No. 1. pp. 395-406.
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    abstract = "In this paper we report on a very sensitive biosensor based on gold asymmetric nanoantennas that are capable of enhancing the molecular resonances of C-H bonds. The nanoantennas are arranged as arrays of asymmetric-split H-shape (ASH) structures, tuned to produce plasmonic resonances with reflectance double peaks within the mid-infrared vibrational resonances of C-H bonds for the assay of deposited films of the molecule 17{\ss}- estradiol (E2), used as an analyte. Measurements and numerical simulations of the reflectance spectra have enabled an estimated enhancement factor on the order of 105 to be obtained for a thin film of E2 on the ASH array. A high sensitivity value of 2335 nm/RIU was achieved, together with a figure of merit of approximately 8. Our experimental results were corroborated using numerical simulations for the C-H stretch vibrational resonances from the analyte, superimposed on the plasmonic resonances of the ASH nanoantennas.",
    keywords = "biosensor , nanoantennas , molecular resonances",
    author = "I.G. Mbomson and S. Tabor and B. Lahiri and G. Sharpe and S.G. McMeekin and {De La Rue}, R.M. and N.P. Johnson",
    note = "OA article Funder note - The authors acknowledge support from the J.J Mbomson Education Foundation (IGM) the EPSRC in the form of a scholarship for ST (grant number EP/M506539/1 and EP/L50497X/1).",
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    Mbomson, IG, Tabor, S, Lahiri, B, Sharpe, G, McMeekin, SG, De La Rue, RM & Johnson, NP 2017, 'Asymmetric split H-shape nanoantennas for molecular sensing', Biomedical Optics Express, vol. 8, no. 1, pp. 395-406. https://doi.org/10.1364/BOE.8.000395

    Asymmetric split H-shape nanoantennas for molecular sensing. / Mbomson, I.G.; Tabor, S.; Lahiri, B.; Sharpe, G.; McMeekin, S.G.; De La Rue, R.M.; Johnson, N.P.

    In: Biomedical Optics Express, Vol. 8, No. 1, 01.2017, p. 395-406.

    Research output: Contribution to journalArticle

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    AU - Lahiri, B.

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    AU - McMeekin, S.G.

    AU - De La Rue, R.M.

    AU - Johnson, N.P.

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