Chemical Detection using a Metal-Organic Framework Single Crystal Coupled to an Optical Fiber


The quantitative detection and real-time monitoring of target chemicals in the liquid phase are made possible by combining the tailored adsorption properties of metal-organic framework (MOF) material and the precise measuring capabilities of an optical fiber (OF) Fabry-Pérot interferometer (FPI) device. As the single-crystal MOF host adsorbs target analyte guests from the environment, its dielectric properties change causing the reflection spectrum derived from the FPI device to shift. A single crystal of HKUST-1 was attached to the end-face of an OF to form the sensor OFUMOF (U, union). The sensor's response curve was accurately measured using low concentrations of the target analyte nitrobenzene, an explosive simulant. Additionally, the uptake rate of nitrobenzene into the MOF single crystal was characterized. The experimental results show that the sensor achieved quantitative and real-time adsorption measurements of a target analyte.


Electrical and Computer Engineering

Research Center/Lab(s)

Intelligent Systems Center


The work was supported by the University of Missouri Research Board, the Materials Research Center at Missouri S&T, the United States National Science Foundation (DMR-1352065), and the University of South Florida.

Keywords and Phrases

Chemical detection; Chemical sensors; Crystalline materials; Dielectric properties; Fabry-Perot interferometers; Fiber optic sensors; Nitrobenzene; Optical fibers; Organic chemicals; Organometallics; Adsorption measurement; Adsorption properties; Guest; Host; Metal organic framework; Metal organic framework materials; Quantitative detection; Real time monitoring; Single crystals; Metal-organic framework; Optical fiber sensor

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Document Type

Article - Journal

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© 2019 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Jan 2019