Comprehensive Optical Strain Sensing Through the Use of Colloidal Quantum Dots

The adaptation of colloidal quantum dots loaded within a polymer for use in nondestructive testing can be used as an optical strain gauge due to the nanomaterial’s strain sensing properties. In this paper, we utilized InP/ZnS colloidal quantum dots loaded within a polymer matrix applied onto the sur...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2020-09, Vol.12 (39), p.44156-44162
Main Authors: Sherburne, Michael D, Roberts, Candice R, Brewer, John S, Weber, Thomas E, Laurvick, Tod V, Chandrahalim, Hengky
Format: Article
Language:English
Subjects:
Applications of Polymer, Composite, and Coating Materials
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
nanomaterials
nondestructive testing (NDT)
quality control
quantum dots
strain
stress
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Summary:The adaptation of colloidal quantum dots loaded within a polymer for use in nondestructive testing can be used as an optical strain gauge due to the nanomaterial’s strain sensing properties. In this paper, we utilized InP/ZnS colloidal quantum dots loaded within a polymer matrix applied onto the surface of a dog-bone foil precoated with an epoxy. By employing an empirical formula and a calibration factor, there is a propinquity between both the calculated optical strain and mechanical stress–strain reference data. Fluctuations are observed, which may be due to both additional strain responses not seen by the mechanical data and quantum dot blinking. These results and methods show the applied use of this novel optical nondestructive testing technique for a variety of structures, especially for structures that operate in harsh environments.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.0c12110