Floating AC-DEP (dielectrophoretic) manipulations of fluorescent nanoparticle at metal nanostructure for plasmonic applications

J. Kim, H. J. Shin, K. S. Hwang, J. H. Park

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    We propose the fluorescent nanoparticle manipulations at nano-metal structures with floating AC-DEP force for plasmonic applications. The electrode gap was optimized to induce enough DEP force around the nano-structure for manipulation of the nanoparticles. 10um wide gap of electrode was acquired to apply the floating AC-DEP force at various designed metal nano-structure such as nanowire, y-branch and vortex. The all shape of nano-metal structures are formed at the gap of microelectrode and not connected with microelectrode. The gold nano-structures in the gap of microelectrode were fabricated with e-beam lithography and lift-off process. Before the formation of metal nanostructure, micro electrodes for applying the electric field around the metal nano-structures were fabricated with photolithography and lift-off process. Cadmium selenide (CdSe/ZnS) QDs (0.8 nM, emission wavelength of 605 nm) with a 25 nm zinc sulfide capping layer and 100nm polystyrene nano bead (1 nM, emission wavelength of 610nm) were used as fluorescent nanoparticles. We applied the 8 Vpp, 3 MHz sine wave for the positive DEP force, and it resulted in 108 V/m electric field and 1011 V/m electric field gradient around gold nanowire with floating AC. The fluorescent nanoparticle's attachment at the nanowire is confirmed by the fluorescent optical analysis. The fluorescent nanoparticles are located successfully at designed metal nano-structures for plasmonic applications.

    Original languageEnglish
    Title of host publicationNanophotonics and Micro/Nano Optics II
    EditorsZhiping Zhou, Kazumi Wada
    PublisherSPIE
    ISBN (Electronic)9781628413502
    DOIs
    Publication statusPublished - 2014
    EventNanophotonics and Micro/Nano Optics II - Beijing, China
    Duration: 2014 Oct 92014 Oct 11

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume9277
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Other

    OtherNanophotonics and Micro/Nano Optics II
    Country/TerritoryChina
    CityBeijing
    Period14/10/914/10/11

    Bibliographical note

    Publisher Copyright:
    © 2014 SPIE.

    Keywords

    • Floating DEP (Dielectrophoretic) force
    • Nano metal structures
    • Nanoparticle manipulations
    • Plasmonics
    • Quantum Dots

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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