Surface enhanced Raman scattering properties using Au-coated ZnO nanorods grown by two-step, off-axis pulsed laser deposition

Tatsunori Sakano, Yuto Tanaka, Ryo Nishimura, Nikolay N. Nedyalkov, Petar A. Atanasov, Toshiharu Saiki, Minoru Obara

    Research output: Contribution to journalArticle

    60 Citations (Scopus)

    Abstract

    ZnO nanorod arrays on Si (1 0 0) substrate were grown by the pulsed laser deposition (PLD) method, and then coated with Au. Two samples of Au-coated nanorod arrays with different average diameters of 150 and 400 nm were prepared to investigate the size dependence of the surface enhanced Raman scattering (SERS). The diameter of the nanorods was controllable by the substrate position during PLD. High SERS enhancement was observed from both Au-coated ZnO nanorod arrays. The Raman spectra of rhodamine 6G (R6G) as low as 1 nM were measured with an average diameter of 400 nm at an excitation wavelength of 532 nm. The SERS was explained by the field enhancement effect induced by surface plasmon polaritons of Au-coated nanorods (nanoshells).

    Original languageEnglish
    Article number235304
    JournalJournal of Physics D: Applied Physics
    Volume41
    Issue number23
    DOIs
    Publication statusPublished - 2008 Dec 1

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Acoustics and Ultrasonics
    • Surfaces, Coatings and Films

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