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    Methanol and Humidity Capacitive Sensors Based on Thin Films of MOF Nanoparticles

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    Type
    Article
    Authors
    Andrés, Miguel A. cc
    Vijjapu, Mani Teja
    Surya, Sandeep Goud cc
    Shekhah, Osama cc
    Salama, Khaled N. cc
    Serre, Christian cc
    Eddaoudi, Mohamed cc
    Roubeau, Olivier cc
    Gascón, Ignacio cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Functional Materials Design, Discovery and Development (FMD3)
    Physical Science and Engineering (PSE) Division
    Sensors Lab
    Date
    2020-01-07
    Online Publication Date
    2020-01-07
    Print Publication Date
    2020-01-22
    Embargo End Date
    2021-01-07
    Submitted Date
    2019-11-14
    Permanent link to this record
    http://hdl.handle.net/10754/661010
    
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    Abstract
    The successful development of modern gas sensing technologies requires high sensitivity and selectivity coupled to cost effectiveness, which implies the necessity to miniaturize devices while reducing the amount of sensing material. The appealing alternative of integrating nanoparticles of a porous metal−organic framework (MOF) onto capacitive sensors based on interdigitated electrode (IDE) chips is presented. We report the deposition of MIL-96(Al) MOF thin films via the Langmuir−Blodgett (LB) method on the IDE chips, which allowed the study of their gas/ vapor sensing properties. First, sorption studies of several organic vapors like methanol, toluene, chloroform, etc. were conducted on bulk MOF. The sorption data revealed that MIL-96(Al) presents high affinity toward water and methanol. Later on, ordered LB monolayer films of MIL-96(Al) particles of ∼200 nm were successfully deposited onto IDE chips with homogeneous coverage of the surface in comparison to conventional thin film fabrication techniques such as drop-casting. The sensing tests showed that MOF LB films were selective for water and methanol, and short response/recovery times were achieved. Finally, chemical vapor deposition (CVD) of a porous thin film of Parylene C (thickness∼250−300 nm) was performed on top of the MOF LB films to fabricate a thin selective layer. The sensing results showed an increase in the water selectivity and sensitivity, while those of methanol showed a huge decrease. These results prove the feasibility of the LB technique for the fabrication of ordered MOF thin films onto IDE chips using very small MOF quantities
    Citation
    Andrés, M. A., Vijjapu, M. T., Surya, S. G., Shekhah, O., Salama, K. N., Serre, C., … Gascón, I. (2020). Methanol and Humidity Capacitive Sensors Based on Thin Films of MOF Nanoparticles. ACS Applied Materials & Interfaces. doi:10.1021/acsami.9b20763
    Sponsors
    The research leading to these results has received funding from Spanish MINECO and FEDER (projects MAT2016-78257-R and MAT2017-86826-R), the Aragon Government (DGA) and FEDER (research group E31_17R). M.A.A. acknowledges the support of Ministerio de Educacion from the Spanish ́ Government under an FPU grant (Formacion de Profesorado ́ Universitario, FPU14/05367), a short-term mobility FPU grant (EST18/00291), and of the King Abdullah University of Science and Technology and Advanced Membranes and Porous Materials Center under the Visiting Student Program. The authors acknowledge the use of the Laboratorio de Microscopí as Avanzadas (LMA) at the Instituto de Nanociencia de Aragon (INA, Universidad de Zaragoza). The ́ authors also thank Dr. Prashant Batt and Dr. Zied Ouled for technical support in gas sorption experiments and Dr. Guillermo Antorrena for technical support in GIXRD experiments.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.9b20763
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsami.9b20763
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.9b20763
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Functional Materials Design, Discovery and Development (FMD3); Electrical and Computer Engineering Program; Chemical Science Program; Sensors Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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