SnO2-CuO heterostructured nanofibers for enhanced NH3-gas-sensing performance and potential application in breath analysis

The development of semiconductor gas sensor has potential applications in breath analysis to realize non-invasive health monitoring. Herein, tin oxide (SnO 2 ) and copper oxide (CuO) heterocomposite nanofibers were fabricated by electrospinning Sn and Cu precursors on Si substrates, followed by calc...

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Bibliographic Details
Published in:IEEE sensors journal 2023-08, Vol.23 (16), p.1-1
Main Authors: Zang, Chuanlai, Ma, Kaijie, Yano, Yasuo, Li, Shuowei, Yamahara, Hiroyasu, Seki, Munetoshi, Iizuka, Tetsuya, Tabata, Hitoshi
Format: Article
Language:English
Subjects:
Ammonia
breath analysis
Calcination
Copper
Copper oxides
CuO
Diffusion rate
Gas detectors
gas sensor
Gas sensors
nanofiber
Nanofibers
Roasting
Room temperature
Rough surfaces
Sensors
Silicon substrates
SnO<sub xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">2
Surface roughness
Temperature dependence
Three-dimensional displays
Tin
Tin dioxide
Tin oxides
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Summary:The development of semiconductor gas sensor has potential applications in breath analysis to realize non-invasive health monitoring. Herein, tin oxide (SnO 2 ) and copper oxide (CuO) heterocomposite nanofibers were fabricated by electrospinning Sn and Cu precursors on Si substrates, followed by calcination for sensing ammonia (NH 3 ) with high sensitivity. The surface states of SnO 2 -CuO nanofibers, with different SnO 2 :CuO ratios, before and after calcination reveal different diffusion rates of SnO 2 and CuO. Scanning electron microscopy images indicated that a large amount of CuO precipitated and formed nanograins that were adsorbed on the surface of SnO 2 nanofibers with an increasing Cu ratio. Compared to pure SnO 2 nanofibers, SnO 2 -CuO (2:1) heterocomposite nanofibers exhibited a significantly enhanced NH 3 -sensing response ( R a / R g = 17.6). The mechanism was confirmed via the surface-state and band-structure analyses. The temperature dependent response was also investigated. The SnO 2 -CuO (2:1) heterocomposite nanofibers show good response at room temperature. Thus, a demo of the application in breath analysis based on fabricated SnO 2 -CuO hetero-composite sensors was also exhibited.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2023.3294409