Gold colloidals optical characterization by observing their scattering polarization

Bassam Al-Qadi, Toshiharu Saiki

    研究成果: Conference contribution

    抄録

    Polarized light scattering is utilized to measure the optical anisotropy and the aspect ratio for nearly spherical colloidal gold nanoparticles as well as to observe their rotational dynamics which were detected as fluctuations in the time-trace of the scattering polarization. A comparison between the measured distributions of maximum anisotropy and aspect ratio with those distributions calculated based on the TEM images analysis are found to show an excellent agreement confirming the validity of our approach. Our method has the advantage to be simple, easy to implement, and can yield access to different projections of the particle due to its rotational diffusion. The range of aspect ratios for the sample being studied is 1 ~ 1.3 and another results for rods with aspect ratio of 2.4 is discussed. Gold nanoparticles have a good biocompatibility where the possibility of conjugation to a variety of biomolecules and antibodies make them suitable for optical imaging and optical probes which can be used for nanoscale orientaional sensing to monitor orientations and rotations of biomolecules during their functional task.

    本文言語English
    ホスト出版物のタイトルPlasmonics in Biology and Medicine VII
    DOI
    出版ステータスPublished - 2010 5 3
    イベントPlasmonics in Biology and Medicine VII - San Francisco, CA, United States
    継続期間: 2010 1 252010 1 28

    出版物シリーズ

    名前Progress in Biomedical Optics and Imaging - Proceedings of SPIE
    7577
    ISSN(印刷版)1605-7422

    Other

    OtherPlasmonics in Biology and Medicine VII
    CountryUnited States
    CitySan Francisco, CA
    Period10/1/2510/1/28

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Biomaterials
    • Atomic and Molecular Physics, and Optics
    • Radiology Nuclear Medicine and imaging

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