Comprehensive Optical Strain Sensing Through the Use of Colloidal Quantum Dots.

Autor:	Sherburne MD; Department of Electrical and Computer Engineering, Air Force Institute of Technology, Dayton, Ohio 45433, United States., Roberts CR; Department of Aeronautics and Astronautics, Air Force Institute of Technology, Dayton, Ohio 45433, United States., Brewer JS; Department of Aeronautics and Astronautics, Air Force Institute of Technology, Dayton, Ohio 45433, United States., Weber TE; Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States., Laurvick TV; Department of Electrical and Computer Engineering, Air Force Institute of Technology, Dayton, Ohio 45433, United States., Chandrahalim H; Department of Electrical and Computer Engineering, Air Force Institute of Technology, Dayton, Ohio 45433, United States.
Jazyk:	angličtina
Zdroj:	ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2020 Sep 30; Vol. 12 (39), pp. 44156-44162. Date of Electronic Publication: 2020 Sep 15.
DOI:	10.1021/acsami.0c12110
Abstrakt:	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.
Databáze:	MEDLINE
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