Advanced Materials

Multifunctional Nanowire Evanescent Wave Optical Sensors

Authors

  • D. J. Sirbuly,

    1. Department of Chemistry, University of California, Berkeley, CA 94720, USA
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
    3. Current address: Chemistry, Materials, and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
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  • A. Tao,

    1. Department of Chemistry, University of California, Berkeley, CA 94720, USA
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
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  • M. Law,

    1. Department of Chemistry, University of California, Berkeley, CA 94720, USA
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
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  • R. Fan,

    1. Department of Chemistry, University of California, Berkeley, CA 94720, USA
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
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  • P. Yang

    1. Department of Chemistry, University of California, Berkeley, CA 94720, USA
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
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  • This work was supported in part by the Camille and Henry Dreyfus Foundation, and the Department of Energy under Contract No. DE-AC02-05CH11231. Work at the Lawrence Berkeley National Laboratory was supported by the Office of Science, Basic Energy Sciences, Division of Materials Science of the Department of Energy. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

A photonic sensing platform that utilizes the evanescent field of a subwavelength nanowire waveguide to perform optical spectroscopy on femtoliter probe volumes is demonstrated. Each evanescent sensor is capable of carrying out absorbance, fluorescence, and surface-enhanced Raman spectroscopy measurements on the same analyte while operating within a microfluidic flow cell (see figure).

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