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Title: Hybrid Polymer/Metal–Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range [Hybrid Polymer/MOF Films for Colorimetric Water Sensing over a Wide Concentration Range]

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 H 2O to the MOF film, enabling quantitative determination of RH using time as the distinguishing metric. Lastly, 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.

Authors:
 [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1459992
Report Number(s):
SAND-2018-5974J
Journal ID: ISSN 1944-8244; 664014
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 10; Journal Issue: 28; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; colorimetric sensing; HKUST-1; humidity detection; metal−organic framework; open metal site; polymer; thin film

Citation Formats

Ullman, Andrew M., Jones, Christopher G., Doty, F. Patrick, Stavila, Vitalie, Talin, A. Alec, and Allendorf, Mark D. Hybrid Polymer/Metal–Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range [Hybrid Polymer/MOF Films for Colorimetric Water Sensing over a Wide Concentration Range]. United States: N. p., 2018. Web. doi:10.1021/acsami.8b07377.
Ullman, Andrew M., Jones, Christopher G., Doty, F. Patrick, Stavila, Vitalie, Talin, A. Alec, & Allendorf, Mark D. Hybrid Polymer/Metal–Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range [Hybrid Polymer/MOF Films for Colorimetric Water Sensing over a Wide Concentration Range]. United States. doi:10.1021/acsami.8b07377.
Ullman, Andrew M., Jones, Christopher G., Doty, F. Patrick, Stavila, Vitalie, Talin, A. Alec, and Allendorf, Mark D. Mon . "Hybrid Polymer/Metal–Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range [Hybrid Polymer/MOF Films for Colorimetric Water Sensing over a Wide Concentration Range]". United States. doi:10.1021/acsami.8b07377. https://www.osti.gov/servlets/purl/1459992.
@article{osti_1459992,
title = {Hybrid Polymer/Metal–Organic Framework Films for Colorimetric Water Sensing over a Wide Concentration Range [Hybrid Polymer/MOF Films for Colorimetric Water Sensing over a Wide Concentration Range]},
author = {Ullman, Andrew M. and Jones, Christopher G. and Doty, F. Patrick and Stavila, Vitalie and Talin, A. Alec and Allendorf, Mark D.},
abstractNote = {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. Lastly, 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.},
doi = {10.1021/acsami.8b07377},
journal = {ACS Applied Materials and Interfaces},
issn = {1944-8244},
number = 28,
volume = 10,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 3 works
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Figures / Tables:

Figure 1. Figure 1.: a) Spin coat and evaporative heating scheme for growth of HKUST-1 thin films on glass or plastic substrates. b) Optical images showing the color change associated with the activation process (light blue to purple) which corresponds to the removal of chemisorbed water from within the MOF pores.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.