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Type: Journal article
Title: Nitric oxide optical fiber sensor based on exposed core fibers and CdTe/CdS quantum dots
Author: Ding, L.
Ruan, Y.
Li, T.
Huang, J.
Warren-Smith, S.
Ebendorff-Heidepriem, H.
Monro, T.
Citation: Sensors and Actuators B: Chemical: international journal devoted to research and development of physical and chemical transducers, 2018; 273:9-17
Publisher: Elsevier
Issue Date: 2018
ISSN: 0925-4005
Statement of
Liyun Ding, Yinlan Ruan, Tao Li, Jun Huang, Stephen C. Warren-Smith, Heike Ebendorff-Heidepriem, Tanya M. Monro
Abstract: Nitric oxide plays a crucial role as a messenger in biological systems, but limitations in measurement are restricted due to its relatively low concentration and short half-life time. Here we report a novel approach to sensing nitric oxide by using an exposed core fiber with its core coated with CdTe/CdS core/shell quantum dots. This enables rapid detection and opens up the possibility of monitoring its production within biological systems. The detection mechanism is based on fluorescence quenching of CdTe/CdS quantum dots by nitric oxide, which can coordinate with Cd²⁺ directly as a ligand forming transition metal complexes. We demonstrate that CdTe/CdS quantum dots functionlization exposed core optical fibers can respond rapidly to nitric oxide in physiological environments with picomolar sensitivity.
Keywords: Nitric oxide sensing; exposed core optical fiber; CdTe/CdS core/shell quantum dots; picomolar sensitivity
Rights: © 2018 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.snb.2018.06.012
Grant ID: ARC
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