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14 May 2019 Nanostructured sapphire optical fiber with Au nanorods entrapped in the cladding for gas sensing in harsh environments (Conference Presentation)
Kai Liu, Jeffrey Wuenschell, Paul Ohodnicki, Henry Du
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Proceedings Volume 11000, Fiber Optic Sensors and Applications XVI; 110000F (2019) https://doi.org/10.1117/12.2518770
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States
Abstract
This presentation reports the use of nanostructured sapphire optical fiber (NSOF) with Au nanorods entrapped in anodized aluminum oxide (AAO) cladding for surface-enhanced Raman spectroscopy (SERS) sensing at elevated temperatures. Specifically, Au nanorods were fabricated in AAO pore channels by in-situ electroless reduction aided with Au nanoparticle catalysts. We show that the AAO pore channels endow the Au nanorods with enhanced thermal stability through geometrical confinement at up to 1000°C. The NSOF with entrapped Au nanorods was used for SERS measurements at temperatures ranging from room temperature to 800°C. The capacity of the novel fiber structure for sensing of hot gases in harsh environments was demonstrated.
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Kai Liu, Jeffrey Wuenschell, Paul Ohodnicki, and Henry Du "Nanostructured sapphire optical fiber with Au nanorods entrapped in the cladding for gas sensing in harsh environments (Conference Presentation)", Proc. SPIE 11000, Fiber Optic Sensors and Applications XVI, 110000F (14 May 2019); https://doi.org/10.1117/12.2518770
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KEYWORDS
Gold
Nanorods
Cladding
Environmental sensing
Nanostructuring
Optical fibers
Sapphire
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