New optical systems for the solar generation of nanomaterials

    Research output: Contribution to journalConference articlepeer-review

    14 Scopus citations

    Abstract

    New strategies for the efficient use of concentrated sunlight to synthesize carbon nanomaterials are described - approaches that offer a potentially far less expensive production facility that is also amenable to being scaled up, in contrast to the conventional costly technologies of laser ablation furnaces and plasma discharge chambers. Our designs employ solar fiber-optic mini-concentrators that completely decouple the collection and remote indoor delivery of solar radiation into a high-temperature nanomaterial reactor. High flux on the target graphite rod is produced by the overlap of low numerical aperture concentrator units - a strategy that also accommodates the sizable gap required between the target inside the reactor and the distal fiber tips on the reactor exterior. The reactor incorporates a nonimaging photon regenerator that traps thermal radiation emitted from the target. This in turn allows a dramatic reduction in solar input relative to earlier solar nanomaterial furnaces. Designs and performance estimates are provided for a system with target temperatures in excess of 3000 K, and hence with significant nanomaterial yields.

    Original languageEnglish
    Pages (from-to)99-108
    Number of pages10
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Volume5185
    DOIs
    StatePublished - 3 May 2004
    EventNonimaging Optics: Maximum Efficiency Light Transfer VII - San Diego, CA, United States
    Duration: 3 Aug 20034 Aug 2003

    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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