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Title: Metal–Organic Framework Thin Film Coated Optical Fiber Sensors: A Novel Waveguide-Based Chemical Sensing Platform

Abstract

Integration of optical fiber with sensitive thin films offers great potential for the realization of novel chemical sensing platforms. In this study, we present a simple design strategy and high performance of nanoporous metal–organic framework (MOF) based optical gas sensors, which enables detection of a wide range of concentrations of small molecules based upon extremely small differences in refractive indices as a function of analyte adsorption within the MOF framework. Thin and compact MOF films can be uniformly formed and tightly bound on the surface of etched optical fiber through a simple solution method which is critical for manufacturability of MOF-based sensor devices. The resulting sensors show high sensitivity/selectivity to CO 2 gas relative to other small gases (H 2, N 2, O 2, and CO) with rapid (< tens of seconds) response time and excellent reversibility, which can be well correlated to the physisorption of gases into a nanoporous MOF. We propose a refractive index based sensing mechanism for the MOF-integrated optical fiber platform which results in an amplification of inherent optical absorption present within the MOF-based sensing layer with increasing values of effective refractive index associated with adsorption of gases.

Authors:
ORCiD logo [1];  [1];  [1];  [2]
  1. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); AECOM, Pittsburgh, PA (United States)
  2. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States). In-house Research
Sponsoring Org.:
USDOE
OSTI Identifier:
1455424
Grant/Contract Number:  
FE0004000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Sensors
Additional Journal Information:
Journal Volume: 3; Journal Issue: 2; Journal ID: ISSN 2379-3694
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; carbon dioxide sensing; chemical sensor; metal−organic framework thin film; optical fiber sensor; small gases sensing

Citation Formats

Kim, Ki-Joong, Lu, Ping, Culp, Jeffrey T., and Ohodnicki, Paul R.. Metal–Organic Framework Thin Film Coated Optical Fiber Sensors: A Novel Waveguide-Based Chemical Sensing Platform. United States: N. p., 2018. Web. doi:10.1021/acssensors.7b00808.
Kim, Ki-Joong, Lu, Ping, Culp, Jeffrey T., & Ohodnicki, Paul R.. Metal–Organic Framework Thin Film Coated Optical Fiber Sensors: A Novel Waveguide-Based Chemical Sensing Platform. United States. doi:10.1021/acssensors.7b00808.
Kim, Ki-Joong, Lu, Ping, Culp, Jeffrey T., and Ohodnicki, Paul R.. Thu . "Metal–Organic Framework Thin Film Coated Optical Fiber Sensors: A Novel Waveguide-Based Chemical Sensing Platform". United States. doi:10.1021/acssensors.7b00808.
@article{osti_1455424,
title = {Metal–Organic Framework Thin Film Coated Optical Fiber Sensors: A Novel Waveguide-Based Chemical Sensing Platform},
author = {Kim, Ki-Joong and Lu, Ping and Culp, Jeffrey T. and Ohodnicki, Paul R.},
abstractNote = {Integration of optical fiber with sensitive thin films offers great potential for the realization of novel chemical sensing platforms. In this study, we present a simple design strategy and high performance of nanoporous metal–organic framework (MOF) based optical gas sensors, which enables detection of a wide range of concentrations of small molecules based upon extremely small differences in refractive indices as a function of analyte adsorption within the MOF framework. Thin and compact MOF films can be uniformly formed and tightly bound on the surface of etched optical fiber through a simple solution method which is critical for manufacturability of MOF-based sensor devices. The resulting sensors show high sensitivity/selectivity to CO2 gas relative to other small gases (H2, N2, O2, and CO) with rapid (< tens of seconds) response time and excellent reversibility, which can be well correlated to the physisorption of gases into a nanoporous MOF. We propose a refractive index based sensing mechanism for the MOF-integrated optical fiber platform which results in an amplification of inherent optical absorption present within the MOF-based sensing layer with increasing values of effective refractive index associated with adsorption of gases.},
doi = {10.1021/acssensors.7b00808},
journal = {ACS Sensors},
number = 2,
volume = 3,
place = {United States},
year = {Thu Jan 18 00:00:00 EST 2018},
month = {Thu Jan 18 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on January 18, 2019
Publisher's Version of Record

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Cited by: 2 works
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