Stress-Sensing Nanomaterial Calibrated with Photostimulated Luminescence Emission

    Authors

    A. Stevenson; A. Jones;S. Raghavan

    Comments

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    Abbreviated Journal Title

    Nano Lett.

    Keywords

    Alumina nanoparticles; photostimulated luminescence; piezospectroscopy; stress-sensing; ALUMINA-FILLED EPOXY; VOIGT FUNCTION; NANOCOMPOSITES; FRACTURE; PERFORMANCE; COMPOSITES; MECHANISMS; BEHAVIOR; PROFILE; Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &; Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

    Abstract

    Calibration of high spatial resolution stress-sensing alumina-epoxy nanomaterials is presented. The piezospectroscopic property of luminescent chromium-doped alumina nanoparticles embedded as "nano-sensors" in epoxy-based materials is the basis for the stress sensing capabilities. The stress-optical properties are determined as piezopectroscopic coefficients in compression experiments for nanomaterials containing varying volume fractions of alumina nanoparticles. An increasing stress-sensitivity was demonstrated with higher volume fractions. Thermal variations were shown to have negligible effects on the stress sensing property. The development of this material sensing system will enable quantitative measurement and non-invasive monitoring of stress distributions within a polymer system applied as adhesives or as coatings on a substrate under loading conditions.

    Journal Title

    Nano Letters

    Volume

    11

    Issue/Number

    8

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    3274

    Last Page

    3278

    WOS Identifier

    WOS:000293665600037

    ISSN

    1530-6984

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