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    Plasmonic Nanowires for Wide Wavelength Range Molecular Sensing

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    materials-11-00827.pdf
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    Published Version
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    materials-11-00827-s001.zip
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    Type
    Article
    Authors
    Marinaro, Giovanni
    Das, Gobind cc
    Giugni, Andrea
    Allione, Marco cc
    Torre, Bruno
    Candeloro, Patrizio cc
    Kosel, Jürgen cc
    Di Fabrizio, Enzo M. cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Sensing, Magnetism and Microsystems Lab
    Date
    2018-05-17
    Permanent link to this record
    http://hdl.handle.net/10754/627940
    
    Metadata
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    Abstract
    In this paper, we propose the use of a standing nanowires array, constituted by plasmonic active gold wires grown on iron disks, and partially immersed in a supporting alumina matrix, for surface-enhanced Raman spectroscopy applications. The galvanic process was used to fabricate nanowires in pores of anodized alumina template, making this device cost-effective. This fabrication method allows for the selection of size, diameter, and spatial arrangement of nanowires. The proposed device, thanks to a detailed design analysis, demonstrates a broadband plasmonic enhancement effect useful for many standard excitation wavelengths in the visible and NIR. The trigonal pores arrangement gives an efficiency weakly dependent on polarization. The devices, tested with 633 and 830 nm laser lines, show a significant Raman enhancement factor, up to around 6 × 10⁴, with respect to the flat gold surface, used as a reference for the measurements of the investigated molecules.
    Citation
    Marinaro G, Das G, Giugni A, Allione M, Torre B, et al. (2018) Plasmonic Nanowires for Wide Wavelength Range Molecular Sensing. Materials 11: 827. Available: http://dx.doi.org/10.3390/ma11050827.
    Sponsors
    DFT calculations were carried out using the resources of the Supercomputing Laboratory at King Abdullah University of Science & Technology (KAUST) in Thuwal, Saudi Arabia
    Publisher
    MDPI AG
    Journal
    Materials
    DOI
    10.3390/ma11050827
    PubMed ID
    29772804
    Additional Links
    http://www.mdpi.com/1996-1944/11/5/827
    ae974a485f413a2113503eed53cd6c53
    10.3390/ma11050827
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Electrical and Computer Engineering Program; Material Science and Engineering Program; Sensing, Magnetism and Microsystems Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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