Functionalized ZnO Microbelt as Improved CO Sensor. (2016)

• Record Type: Journal Article
• Authors: Le, Dang Thi Thanh; Yu, Ruomeng; Iacob, Erica; Tonezzer, Matteo
• Is Part Of: Procedia engineering. Volume 168(2016)
• Page Start: 1090
• Page End: 1093
• Publication Date: 2016
• Subjects: gas sensor -- zinc oxide -- carbon monoxide -- hybrid -- tetraphenylporphyrin; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2016.11.347
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: Miniaturized gas sensors are increasingly important to monitor the quality of air in a wide range of human environments. Semiconductor metal oxides have proved to be a useful family of materials, in this direction. Unfortunately, metal oxide sensors need a high temperature to respond to any target gas. In order to work around this limit, we fabricate hybrid sensors consisting in single zinc oxide microbelts decorated with organic molecules. Fluorinated tetraphenylporphyrin (H2 TTPF) is deposited via supersonic molecular beam and considerably improve the performance of the microsensor. The microdevice is investigated with XRD, SEM and AFM techniques. While the as-is ZnO microbelt shows no response up to 150°C, the H2 TTPF decorated microsensor shows a clear and quick response even at 75°C.