Comprehensive optical strain sensing through the use of colloidal quantum dots

Authors

Michael D. Sherburne, Air Force Institute of Technology
Candice R. Roberts, Air Force Institute of Technology
John S. Brewer, Air Force Institute of Technology
Thomas E. Weber, Los Alamos National Laboratory
Tod E. Laurvick, Air Force Institute of Technology
Hengky Chandrahalim, Air Force Institute of TechnologyFollow

Document Type

Article

Publication Date

9-2-2020

Abstract

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 pre-coated 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 applied use of this novel optical non-destructive testing technique for a variety of structures, especially for structures which operate in harsh environments.

Comments

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This is an Open Access conference paper published and distributed under the terms of the  Creative Commons Attribution-NonCommercial-NoDerivatives License , which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.CC BY-NC-ND 4.0

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Co-author John Brewer was an AFIT PhD candidate at the time of this conference. (AFIT-ENY-DS-20-D-057, December 2020).

DOI

10.1021/acsami.0c12110

Source Publication

ACS Applied Materials and Interfaces

Recommended Citation

Sherburne, M. D.; Roberts, C. R.; Brewer, J. S.; Weber, T. E.; Laurvick, T. V; Chandrahalim, H. Comprehensive Optical Strain Sensing Through the Use of Colloidal Quantum Dots. ACS Appl. Mater. Interfaces 2020, 12 (39), 43341–44382. https://doi.org/10.1021/acsami.0c12110.