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2 March 2020 Structural coloration from total internal reflection at microscale concave surfaces and use for sensing in complex droplets
Ashley P. Saunders, Lauren D. Zarzar
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Proceedings Volume 11292, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIII; 112920X (2020) https://doi.org/10.1117/12.2545151
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
Complex emulsion droplets consisting of hydrocarbon and fluorocarbon oils dispersed in water have been shown to exhibit iridescent structural color via interference from total internal reflection, and the color is tunable based on the size, shape, composition, and orientation of the droplets. Our study explores the structural color properties of complex emulsion droplets and their application to colorimetric chemical sensing through the use of an α- amylase responsive surfactant solution composed of γ-cyclodextrin, Triton X-100 surfactant, and Capstone FS-30 surfactant. We aim to demonstrate proof-of-concept sensitivity of biphasic oil-in-water emulsion droplets for colorimetric sensing through the correlation of reflected structural color patterns to droplet shape and size.
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Ashley P. Saunders and Lauren D. Zarzar "Structural coloration from total internal reflection at microscale concave surfaces and use for sensing in complex droplets", Proc. SPIE 11292, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIII, 112920X (2 March 2020); https://doi.org/10.1117/12.2545151
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KEYWORDS
Microscopes
Interfaces
Cell phones
Microfluidics
Biological and chemical sensing
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