Single quantum dot fluorescence enhancement by tunable nanoporous gold

Yunke Song, Ling Zhang, Mingwei Chen, Tza Huei Wang

    研究成果: Conference contribution

    1 被引用数 (Scopus)

    抄録

    Nanoengineered metal materials with the property of surface enhanced fluorescence (SEF) are attracting considerable attention due to their promising contribution to the fields such as biosensing and photonics by lowering the limit of detection (LOD) and enhancing the illumination efficiency. A variety of SEF materials such as nanoantennae [1, 2] and nanoparticles [3-8] have demonstrated significant fluorescence enhancement on organic fluorophores. Despite numerous advantages, such nanomaterials have their own limitations. Fabrication of SEF materials often involves complicated lithography processes, limiting their ubiquitous application. In addition, most SEF materials are designed to enhance fluorescence at certain local hot spots [4]; however, strong enhancement over a wide area is preferred in many applications. Herein we demonstrate a tunable three-dimensional (3D) free-standing nanoporous gold (NPG) film which greatly enhances the fluorescence of semiconductor quantum dots (QDs). QDs on the ligament experience near-field enhanced excitation and the decay of magnetic field, emitting more photons in a given time period. The NPG film is fabricated by simple chemical etching process and its nanopore size can be flexibly tuned by controlling the etching time and temperature. We demonstrate a high enhancement factor of 50-fold of QDs fluorescence achieved by NPG films. The superior fluorescence enhancement greatly improves imaging of single QDs using regular fluorescence microscopy.

    本文言語English
    ホスト出版物のタイトル2012 12th IEEE International Conference on Nanotechnology, NANO 2012
    DOI
    出版ステータスPublished - 2012 11月 22
    イベント2012 12th IEEE International Conference on Nanotechnology, NANO 2012 - Birmingham, United Kingdom
    継続期間: 2012 8月 202012 8月 23

    出版物シリーズ

    名前Proceedings of the IEEE Conference on Nanotechnology
    ISSN(印刷版)1944-9399
    ISSN(電子版)1944-9380

    Other

    Other2012 12th IEEE International Conference on Nanotechnology, NANO 2012
    国/地域United Kingdom
    CityBirmingham
    Period12/8/2012/8/23

    ASJC Scopus subject areas

    • バイオエンジニアリング
    • 電子工学および電気工学
    • 材料化学
    • 凝縮系物理学

    フィンガープリント

    「Single quantum dot fluorescence enhancement by tunable nanoporous gold」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル