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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Layered alpha-MoO3 nanoplates for gas sensing applications

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Author(s):
Felix, A. A. [1] ; Silva, R. A. [1] ; Orlandi, M. O. [1]
Total Authors: 3
Affiliation:
[1] Sao Paulo State Univ UNESP, Dept Engn Phys & Math, Chem Inst, Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: CrystEngComm; v. 22, n. 27, p. 4640-4649, JUL 21 2020.
Web of Science Citations: 0
Abstract

The synthesis of alpha-MoO(3)nanoplates with a unique well-faceted rectangular morphology produced by a polymeric solution route is presented. This versatile chemical route allowed the growth of layered nanoplates on different crystalline substrates to manufacture electronic/optoelectronic nanodevices. The alpha-MoO3 crystalline phase was identified by both X-ray diffraction (XRD) and Raman spectroscopy. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed that the well-faceted rectangular layered nanoplates can be obtained depending on the fine control of the synthesis parameters due to the MoO3 sublimation. Gas sensing measurements revealed that the alpha-MoO3 nanoplates exhibit an enhanced response to NO2, with sensor signals up to 50, combined with a low optimum operating temperature. In addition, the devices exhibited the highest selectivity to NO2 relative to H-2, CO, and CH4, which can be a consequence of the specific exposed surface plane. These results reveal that layered alpha-MoO3 nanoplates are promising for use in the manufacturing of high-performance NO2 gas sensor nanodevices. (AU)

FAPESP's process: 17/26219-0 - Study of single element chemical sensor devices based on semiconducting metal oxide materials
Grantee:Marcelo Ornaghi Orlandi
Support type: Regular Research Grants