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      A Comparative Study of Interdigitated Electrode and Quartz Crystal Microbalance Transduction Techniques for Metal–Organic Framework-Based Acetone Sensors

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          Abstract

          We present a comparative study of two types of sensor with different transduction techniques but coated with the same sensing material to determine the effect of the transduction mechanism on the sensing performance of sensing a target analyte. For this purpose, interdigitated electrode (IDE)-based capacitors and quartz crystal microbalance (QCM)-based resonators were coated with a zeolitic–imidazolate framework (ZIF-8) metal–organic framework thin films as the sensing material and applied to the sensing of the volatile organic compound acetone. Cyclic immersion in methanolic precursor solutions technique was used for depositing the ZIF-8 thin films. The sensors were exposed to various acetone concentrations ranging from 5.3 to 26.5 vol % in N 2 and characterized/compared for their sensitivity, hysteresis, long-term and short-term stability, selectivity, detection limit, and effect of temperature. Furthermore, the IDE substrates were used for resistive transduction and compared using capacitive transduction.

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          Modular chemistry: secondary building units as a basis for the design of highly porous and robust metal-organic carboxylate frameworks.

          Mohamed Eddaoudi, David Moler, Hailian Li … (2001)
          Secondary building units (SBUs) are molecular complexes and cluster entities in which ligand coordination modes and metal coordination environments can be utilized in the transformation of these fragments into extended porous networks using polytopic linkers (1,4-benzenedicarboxylate, 1,3,5,7-adamantanetetracarboxylate, etc.). Consideration of the geometric and chemical attributes of the SBUs and linkers leads to prediction of the framework topology, and in turn to the design and synthesis of a new class of porous materials with robust structures and high porosity.
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            MOF thin films: existing and future applications.

            O Shekhah, J. Liu, R A Fischer … (2011)
            The applications and potentials of thin film coatings of metal-organic frameworks (MOFs) supported on various substrates are discussed in this critical review. Because the demand for fabricating such porous coatings is rather obvious, in the past years several synthesis schemes have been developed for the preparation of thin porous MOF films. Interestingly, although this is an emerging field seeing a rapid development a number of different applications on MOF films were either already demonstrated or have been proposed. This review focuses on the fabrication of continuous, thin porous films, either supported on solid substrates or as free-standing membranes. The availability of such two-dimensional types of porous coatings opened the door for a number of new perspectives for functionalizing surfaces. Also for the porous materials themselves, the availability of a solid support to which the MOF-films are rigidly (in a mechanical sense) anchored provides access to applications not available for the typical MOF powders with particle sizes of a few μm. We will also address some of the potential and applications of thin films in different fields like luminescence, QCM-based sensors, optoelectronics, gas separation and catalysis. A separate chapter has been devoted to the delamination of MOF thin films and discusses the potential to use them as free-standing membranes or as nano-containers. The review also demonstrates the possibility of using MOF thin films as model systems for detailed studies on MOF-related phenomena, e.g. adsorption and diffusion of small molecules into MOFs as well as the formation mechanism of MOFs (101 references).
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              Metal-organic frameworks as sensors: a ZIF-8 based Fabry-Pérot device as a selective sensor for chemical vapors and gases.

              Guang Lu, Joseph Hupp (2010)
              A ZIF-8 thin film-based Fabry-Pérot device has been fabricated as a selective sensor for chemical vapors and gases. The preparation of the ZIF-8 thin film and a series of ZIF-8 thin films of various thicknesses grown on silicon substrates are presented.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Sensors (Basel)
                Journal ID (iso-abbrev): Sensors (Basel)
                Journal ID (publisher-id): sensors
                Title: Sensors (Basel, Switzerland)
                Publisher: MDPI
                ISSN (Electronic): 1424-8220
                Publication date (Electronic): 12 November 2018
                Publication date Collection: November 2018
                Volume: 18
                Issue: 11
                Electronic Location Identifier: 3898
                Affiliations
                [1 ]Sensors Lab, Electrical Engineering Program, Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; sandeep.surya@ 123456kaust.edu.sa (S.G.S.); khaled.salama@ 123456kaust.edu.sa (K.N.S.)
                [2 ]Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science, Hyderabad 500078, India
                [3 ]Functional Materials Design, Discovery and Development research group (FMD3), Advanced Membranes & Porous Materials Center (AMPMC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia; mohamed.tchalala@ 123456kaust.edu.sa (M.R.T.); osama.Shekhah@ 123456kaust.edu.sa (O.S.); mohamed.eddaoudi@ 123456kaust.edu.sa (M.E.)
                Author notes
                [* ]Correspondence: karumcn@ 123456hyderabad.bits-pilani.ac.in ; Tel.: +91-40-6630-3577
                Author information
                https://orcid.org/0000-0003-0467-6764
                https://orcid.org/0000-0003-1861-9226
                https://orcid.org/0000-0001-7742-1282
                Article
                Publisher ID: sensors-18-03898
                DOI: 10.3390/s18113898
                PMC ID: 6263674
                PubMed ID: 30424566
                SO-VID: 7569437a-022f-4f11-9bdd-8aa12eeb873c
                Copyright © © 2018 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 17 October 2018
                Date accepted : 09 November 2018
                Categories
                Subject: Article

                ScienceOpen disciplines: Biomedical engineering
                Keywords: metal–organic frameworks,ide capacitors,qcm,comparison,acetone,sensors
                Data availability:
                ScienceOpen disciplines: Biomedical engineering
                Keywords: metal–organic frameworks, ide capacitors, qcm, comparison, acetone, sensors

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