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Open AccessArticle

Insights on Capacitive Interdigitated Electrodes Coated with MOF Thin Films: Humidity and VOCs Sensing as a Case Study

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Sensors Lab, Electrical Engineering Program, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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Advanced Membranes & Porous Materials Center, Chemical Science Program, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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Author to whom correspondence should be addressed.
Academic Editor: Michael Tiemann
Sensors 2015, 15(8), 18153-18166; https://doi.org/10.3390/s150818153
Received: 25 June 2015 / Revised: 16 July 2015 / Accepted: 17 July 2015 / Published: 24 July 2015
(This article belongs to the Special Issue Gas Sensors—Designs and Applications)
A prototypical metal-organic framework (MOF), a 2D periodic porous structure based on the assembly of copper ions and benzene dicarboxylate (bdc) ligands (Cu(bdc)·xH2O), was grown successfully as a thin film on interdigitated electrodes (IDEs). IDEs have been used for achieving planar CMOS-compatible low-cost capacitive sensing structures for the detection of humidity and volatile organic compounds (VOCs). Accordingly, the resultant IDEs coated with the Cu(bdc)·xH2O thin film was evaluated, for the first time, as a capacitive sensor for gas sensing applications. A fully automated setup, using LabVIEW interfaces to experiment conduction and data acquisition, was developed in order to measure the associated gas sensing performance. View Full-Text
Keywords: metal organic frameworks (MOFs); thin films; porous materials; interdigitated electrodes (IDEs); gas sensor test setup; humidity sensors; capacitive sensors; volatile organic compounds (VOCs) metal organic frameworks (MOFs); thin films; porous materials; interdigitated electrodes (IDEs); gas sensor test setup; humidity sensors; capacitive sensors; volatile organic compounds (VOCs)
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Sapsanis, C.; Omran, H.; Chernikova, V.; Shekhah, O.; Belmabkhout, Y.; Buttner, U.; Eddaoudi, M.; Salama, K.N. Insights on Capacitive Interdigitated Electrodes Coated with MOF Thin Films: Humidity and VOCs Sensing as a Case Study. Sensors 2015, 15, 18153-18166.

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