Hybrid Polymer/Metal-Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range

Andrew M. Ullman; Christopher G. Jones; F. Patrick Doty; Vitalie Stavila; A. Alec Talin; Mark D. Allendorf

doi:10.1021/acsami.8b07377

Hybrid Polymer/Metal-Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range

Andrew M. Ullman, Christopher G. Jones, F. Patrick Doty, Vitalie Stavila, A. Alec Talin, Mark D. Allendorf

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Because of their extraordinary surface areas and tailorable porosity, metal-organic frameworks (MOFs) have the potential to be excellent sensors of gas-phase analytes. MOFs with open metal sites are particularly attractive for detecting Lewis basic atmospheric analytes, such as water. Here, we demonstrate that thin films of the MOF HKUST-1 can be used to quantitatively determine the relative humidity (RH) of air using a colorimetric approach. HKUST-1 thin films are spin-coated onto rigid or flexible substrates and are shown to quantitatively determine the RH within the range of 0.1-5% RH by either visual observation or a straightforward optical reflectivity measurement. At high humidity (>10% RH), a polymer/MOF bilayer is used to slow the transport of H₂O to the MOF film, enabling quantitative determination of RH using time as the distinguishing metric. Finally, the sensor is combined with an inexpensive light-emitting diode light source and Si photodiode detector to demonstrate a quantitative humidity detector for low humidity environments.

Original language	English
Pages (from-to)	24201-24208
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	10
Issue number	28
DOIs	https://doi.org/10.1021/acsami.8b07377
State	Published - Jul 18 2018
Externally published	Yes

Funding

*E-mail: [email protected]. ORCID Vitalie Stavila: 0000-0003-0981-0432 A. Alec Talin: 0000-0002-1102-680X Mark D. Allendorf: 0000-0001-5645-8246 Author Contributions The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. Funding This work was funded by the Sandia Laboratory Directed Research and Development Program. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell international, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. Notes The authors declare no competing financial interest.

Funders	Funder number
U.S. Department of Energy
National Nuclear Security Administration	DE-NA0003525
Laboratory Directed Research and Development

Keywords

HKUST-1
colorimetric sensing
humidity detection
metal-organic framework
open metal site
polymer
thin film

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsami.8b07377

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abstract = "Because of their extraordinary surface areas and tailorable porosity, metal-organic frameworks (MOFs) have the potential to be excellent sensors of gas-phase analytes. MOFs with open metal sites are particularly attractive for detecting Lewis basic atmospheric analytes, such as water. Here, we demonstrate that thin films of the MOF HKUST-1 can be used to quantitatively determine the relative humidity (RH) of air using a colorimetric approach. HKUST-1 thin films are spin-coated onto rigid or flexible substrates and are shown to quantitatively determine the RH within the range of 0.1-5% RH by either visual observation or a straightforward optical reflectivity measurement. At high humidity (>10% RH), a polymer/MOF bilayer is used to slow the transport of H2O to the MOF film, enabling quantitative determination of RH using time as the distinguishing metric. Finally, the sensor is combined with an inexpensive light-emitting diode light source and Si photodiode detector to demonstrate a quantitative humidity detector for low humidity environments.",

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AU - Allendorf, Mark D.

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Hybrid Polymer/Metal-Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range

Abstract

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Keywords

UN SDGs

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