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Advanced Materials

Block Copolymer Photonic Gel for Mechanochromic Sensing

Authors

  • Edwin P. Chan,

    Corresponding author
    1. Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, MS 8542, Gaithersburg, MD 20899, USA
    • Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, MS 8542, Gaithersburg, MD 20899, USA.
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  • Joseph J. Walish,

    1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Rm 6-113, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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  • Edwin L. Thomas,

    1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Rm 6-113, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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  • Christopher M. Stafford

    Corresponding author
    1. Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, MS 8542, Gaithersburg, MD 20899, USA
    • Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, MS 8542, Gaithersburg, MD 20899, USA.
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Abstract

A mechanochromic sensor based on a block copolymer photonic gel is presented. This material provides a simple yet quantitative means to measure the local stress of an interface via a color change by making advantageous use of the photonic band gap properties and mechanical compliance of a one-dimensional periodic microstructure of a hydrophobic block-hydrophilic polyelectrolyte block copolymer gel.

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