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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]

Journal Article · · ACS Applied Materials and Interfaces

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.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1459992
Report Number(s):
SAND-2018-5974J; 664014
Journal Information:
ACS Applied Materials and Interfaces, Vol. 10, Issue 28; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (7)

Advanced Photoresponsive Materials Using the Metal–Organic Framework Approach journal November 2019
Synthesis of MIL-53 thin films by vapour-assisted conversion journal January 2020
Controlled dye release from a metal–organic framework: a new luminescent sensor for water journal January 2020
Real-time colorimetric water content monitoring of organic solvents by an azo dye incorporated into AlPO 4 -5 nanochannel journal January 2019
Humidity Sensors Based on 3D Porous Polyelectrolytes via Breath Figure Method journal November 2019
Flexible films enabled by coordination polymer nanoarchitectonics journal January 2019
Advanced Photoresponsive Materials Using the Metal–Organic Framework Approach text January 2020

Figures / Tables (6)


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