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Issue 9, 2016
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Towards metal–organic framework based field effect chemical sensors: UiO-66-NH2 for nerve agent detection

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Abstract

We present a highly sensitive gas detection approach for the infamous ‘nerve agent’ group of alkyl phosphonate compounds. Signal transduction is achieved by monitoring the work function shift of metal–organic framework UiO-66-NH2 coated electrodes upon exposure to ppb-level concentrations of a target simulant. Using the Kelvin probe technique, we demonstrate the potential of electrically insulating MOFs for integration in field effect devices such as ChemFETs: a three orders of magnitude improvement over previous work function-based detection of nerve agent simulants. Moreover, the signal is fully reversible both in dry and humid conditions, down to low ppb concentrations. Comprehensive investigation of the interactions that lead towards this high sensitivity points towards a series of confined interactions between the analyte and the pore interior of UiO-66-NH2.

Graphical abstract: Towards metal–organic framework based field effect chemical sensors: UiO-66-NH2 for nerve agent detection

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Supplementary files

Article information


Submitted
02 Mar 2016
Accepted
12 May 2016
First published
24 May 2016

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2016,7, 5827-5832
Article type
Edge Article
Author version available

Towards metal–organic framework based field effect chemical sensors: UiO-66-NH2 for nerve agent detection

I. Stassen, B. Bueken, H. Reinsch, J. F. M. Oudenhoven, D. Wouters, J. Hajek, V. Van Speybroeck, N. Stock, P. M. Vereecken, R. Van Schaijk, D. De Vos and R. Ameloot, Chem. Sci., 2016, 7, 5827
DOI: 10.1039/C6SC00987E

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