Layered α-MoO3 nanoplates for gas sensing applications

The synthesis of α-MoO3 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. T...

Full description

Saved in:
Bibliographic Details
Published in:CrystEngComm 2020-07, Vol.22 (27), p.4640-4649
Main Authors: Felix, A A, Silva, R A, Orlandi, M O
Format: Article
Language:English
Subjects:
Atomic force microscopy
Crystal structure
Crystallinity
Gas sensors
Microscopy
Molybdenum oxides
Molybdenum trioxide
Morphology
Nanotechnology devices
Nitrogen dioxide
Operating temperature
Optoelectronics
Raman spectroscopy
Selectivity
Sublimation
Substrates
Synthesis
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The synthesis of α-MoO3 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 α-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 α-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 H2, CO, and CH4, which can be a consequence of the specific exposed surface plane. These results reveal that layered α-MoO3 nanoplates are promising for use in the manufacturing of high-performance NO2 gas sensor nanodevices.
ISSN:1466-8033
DOI:10.1039/d0ce00599a