Title

Comprehensive optical strain sensing through the use of colloidal quantum dots

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. Abstract © ACS.

Comments

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DOI

10.1021/acsami.0c12110

Source Publication

ACS Appl. Mater. Interfaces

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