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Synthesis and Gas Sensing Properties of Single La-Doped SnO₂ Nanobelts.

Wu Y, Zhang H, Liu Y, Chen W, Ma J, Li S, Qin Z - Sensors (Basel) (2015)

Bottom Line: Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation.Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated.The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

View Article: PubMed Central - PubMed

Affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. wuyuemei893@163.com.

ABSTRACT
Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation. Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated. It is found that the single La-SnO2 NB sensor had a high sensitivity of 8.76 to ethanediol at a concentration of 100 ppm at 230 °C, which is the highest sensitivity of a single SnO2 NB to ethanediol among three kinds of volatile organic (VOC) liquids studied, including ethanediol, ethanol, and acetone. The La-SnO2 NBs sensor also exhibits a high sensitivity, good selectivity and long-term stability with prompt response time to ethanediol. The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

No MeSH data available.


(a) The I–V curves of pure SnO2 NB and La-SnO2 NB devices; (b) The optical microscope image of a prepared La-SnO2 NB device.
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sensors-15-14230-f004: (a) The I–V curves of pure SnO2 NB and La-SnO2 NB devices; (b) The optical microscope image of a prepared La-SnO2 NB device.

Mentions: Figure 4 present typical I–V curves when the devices were in air at room temperature. The approximately linear shape of the curves reveals good Ohmic contacts of SnO2 NB/La-SnO2 NB with the electrodes. The slope of pure SnO2 NB is less than that of the La-SnO2 NB. The resistance of La-SnO2 NB is about 2.05 × 108 Ω and that of pure SnO2 NB is about 2.08 × 109 Ω, indicating that the resistance of SnO2 is greatly reduced after doping. Figure 4b presents a typical optical microscope image of the obtained La-SnO2 NB device, which is composed of an individual nanobelt and Au electrodes.


Synthesis and Gas Sensing Properties of Single La-Doped SnO₂ Nanobelts.

Wu Y, Zhang H, Liu Y, Chen W, Ma J, Li S, Qin Z - Sensors (Basel) (2015)

(a) The I–V curves of pure SnO2 NB and La-SnO2 NB devices; (b) The optical microscope image of a prepared La-SnO2 NB device.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507622&req=5

sensors-15-14230-f004: (a) The I–V curves of pure SnO2 NB and La-SnO2 NB devices; (b) The optical microscope image of a prepared La-SnO2 NB device.
Mentions: Figure 4 present typical I–V curves when the devices were in air at room temperature. The approximately linear shape of the curves reveals good Ohmic contacts of SnO2 NB/La-SnO2 NB with the electrodes. The slope of pure SnO2 NB is less than that of the La-SnO2 NB. The resistance of La-SnO2 NB is about 2.05 × 108 Ω and that of pure SnO2 NB is about 2.08 × 109 Ω, indicating that the resistance of SnO2 is greatly reduced after doping. Figure 4b presents a typical optical microscope image of the obtained La-SnO2 NB device, which is composed of an individual nanobelt and Au electrodes.

Bottom Line: Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation.Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated.The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

View Article: PubMed Central - PubMed

Affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. wuyuemei893@163.com.

ABSTRACT
Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation. Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated. It is found that the single La-SnO2 NB sensor had a high sensitivity of 8.76 to ethanediol at a concentration of 100 ppm at 230 °C, which is the highest sensitivity of a single SnO2 NB to ethanediol among three kinds of volatile organic (VOC) liquids studied, including ethanediol, ethanol, and acetone. The La-SnO2 NBs sensor also exhibits a high sensitivity, good selectivity and long-term stability with prompt response time to ethanediol. The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

No MeSH data available.