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Self-Organized Hexagonal-Nanopore SERS Array

Authors

  • Dukhyun Choi,

    1. Biomolecular Nanotechnology Center Berkeley Sensor and Actuator Center Department of Bioengineering University of California Berkeley, CA 94720–1762 (USA)
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  • Yeonho Choi,

    1. Department of Biomedical Engineering College of Health Science Korea University Seoul 136-703 (Republic of Korea)
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  • Soongweon Hong,

    1. Biomolecular Nanotechnology Center Berkeley Sensor and Actuator Center Department of Bioengineering University of California Berkeley, CA 94720–1762 (USA)
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  • Taewook Kang,

    1. Department of Chemical and Biomolecular Engineering Sogang University Seoul 121-742 (Republic of Korea)
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  • Luke P. Lee

    Corresponding author
    1. Biomolecular Nanotechnology Center Berkeley Sensor and Actuator Center Department of Bioengineering University of California Berkeley, CA 94720–1762 (USA)
    • Biomolecular Nanotechnology Center Berkeley Sensor and Actuator Center Department of Bioengineering University of California Berkeley, CA 94720–1762 (USA).
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  • The authors thank Liz Wu for the technical support. This work was supported by DARPA SERS Fundamental and by a grant (code #: 2009K00470) from the “Center for Nanostructured Materials Technology” under the “21st Century Frontier R&D Programs” of the Ministry of Education, Science, and Technology, Korea. SERS=surface-enhanced Raman spectroscopy.

Abstract

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Non-lithographic fabrication of a self-aligned nanopore SERS array with large-area hexagonal symmetry is achieved by Au deposition on an anodized aluminum oxide (AAO) template. Precise self-formation of plasmonic nanopore arrays with facile structural tunability allows control of the SERS response, and results in highly reproducible, uniform, and sensitive SERS with an enhancement factor of 107.

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