Why Some Materials Are Sensitive to Gases & How Doping Affects Them

[mhabib]

hi.. please tell me that
1) why some materials like ZnO, SnO, Pt, etc r sensitive to gases and others like Si, Ge,
InP, GaAs, etc r not sensitive to gases.
2) how doping increase the sensitivity of a certain material to certain gases.

 

[drizzle]

Hello mhabib,
Search for this paper:

'Metal Oxide Gas Sensors: Sensitivity and Influencing Factors'

Read it, it'll help you :)

 

[mhabib]

thanks drizzle, it gives me a lot.