title: MOF-Based Membrane Encapsulated ZnO Nanowires for Enhanced Gas Sensor Selectivity.
abstract: Gas sensors are of a great interest for applications including toxic or explosive gases detection in both in-house and industrial environments, air quality monitoring, medical diagnostics, or control of food/cosmetic properties. In the area of semiconductor metal oxides (SMOs)-based sensors, a lot of effort has been devoted to improve the sensing characteristics. In this work, we report on a general methodology for improving the selectivity of SMOx nanowires sensors, based on the coverage of ZnO nanowires with a thin ZIF-8 molecular sieve membrane. The optimized ZnO@ZIF-8-based nanocomposite sensor shows markedly selective response to H2 in comparison with the pristine ZnO nanowires sensor, while showing the negligible sensing response to C7H8 and C6H6. This original MOF-membrane encapsulation strategy applied to nanowires sensor architecture pave the way for other complex 3D architectures and various types of applications requiring either gas or ion selectivity, such as biosensors, photo(catalysts), and electrodes.
authors.affiliation: Institut Européen des Membranes, UMR 5635, Université de Montpellier, ENSCM, CNRS , Place Eugène Bataillon, F-34095 Montpellier cedex 5, France.
authors.forename: Martin
authors.initials: M
authors.lastname: Drobek
authors.affiliation: Department of Materials Science and Engineering, Inha University , Incheon 402-751, Republic of Korea.
authors.forename: Jae-Hun
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Institut Européen des Membranes, UMR 5635, Université de Montpellier, ENSCM, CNRS , Place Eugène Bataillon, F-34095 Montpellier cedex 5, France.
authors.forename: Mikhael
authors.initials: M
authors.lastname: Bechelany
authors.affiliation: Institut Européen des Membranes, UMR 5635, Université de Montpellier, ENSCM, CNRS , Place Eugène Bataillon, F-34095 Montpellier cedex 5, France.
authors.forename: Cyril
authors.initials: C
authors.lastname: Vallicari
authors.affiliation: Institut Européen des Membranes, UMR 5635, Université de Montpellier, ENSCM, CNRS , Place Eugène Bataillon, F-34095 Montpellier cedex 5, France.
authors.forename: Anne
authors.initials: A
authors.lastname: Julbe
authors.affiliation: Department of Materials Science and Engineering, Inha University , Incheon 402-751, Republic of Korea.
authors.forename: Sang Sub
authors.initials: SS
authors.lastname: Kim
keywords: ZIF-8 membrane; ZnO; encapsulation; gas sensing; nanowires