Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 13, Pages 8323-8328Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b12062
Keywords
ZnO; nanowires; ZIF-8 membrane; encapsulation; gas sensing
Funding
- Campus France [29888RC]
- Institut Europeen des Membranes
- National Research Foundation of Korea (NRF) - Korea government (MEST) [NRF-2013K1A3A1A21000149]
- National Research Foundation of Korea [2013K1A3A1A21000149] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 H-2 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.
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