Two dimensional (2D) nanomaterials for gas sensing applications
| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Sao Paulo State Univ UNESP, Dept Engn Phys & Math, Chem Inst, Araraquara, SP - Brazil
Total Affiliations: 1
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| 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 |