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Table 1 Hydrogen-sensing response of the In2O3 nanotowers sensor operated at 240 °C in comparison to those of the reported sensors using In2O3-based nano- or micro-structured materials

From: In2O3 Nanotower Hydrogen Gas Sensors Based on Both Schottky Junction and Thermoelectronic Emission

Type

Operated temperature (°C)

Response% (ΔR/R o*100 %) toward H2 under the following concentrations (ppm)

  

2

10–50

150–270

400–500

1000

2000

4000

In2O3 nanotowers

240

13

21

50

64

83

  

In2O3 nanowires [3]

400

  

17

60

   

In2O3 nanoneedles [3]

350

  

10.7

20

   

ZnO/In2O3 nanorods [26]

20–25

 

9.8

15.5

20.5

   

In2O3 thin films [27]

50

   

6.5

   

In2O3 nanowires [28]

200

   

10

   

Au-loaded In2O3 nanofibers [29]

140

   

33

   

In2O3 hollow nanospheres [30]

300

  

41

    

In2O3 nanowires [31]

300

     

69

 

In2O3/ZnO nanowires [32]

400

     

83

 

In2O3 nanowires [32]

300

      

71

In2O3 flower-like microspheres [33]

150

    

10

  

In2O3 urchin-like microspheres [34]

150

    

10

  

In2O3/La/Pd [35]

100

   

3

   

In2O3 nanofibers [36]

300

  

43

    

In2O3 nanowires [37]

250

    

17.9

  

In2O3:Se [38]

    

40

  

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