Please, solve me these Qs quickly ..I have Exame. -What type of carrier\'s confi
ID: 1074081 • Letter: P
Question
Please, solve me these Qs quickly ..I have Exame.
-What type of carrier's confinement does it exists in the following nanostructures at room
temperature? Explain and prove your choice
Ge thin film (5nm thick)-------------------------------------------------------------------------------------------------------
Si Nanowire (30 nm diameter, 2 m length),----------------------------------------------------------------------------
GaAs Nanowire (50 nm diameter, 2 m length) -----------------------------------------------------------------------
InAs nanodot (50 nm diameter) -----------------------------------------------------------------------------------------
Explanation / Answer
Ge thin film (5 nm thick) is formed when 2 dimensions of system are confined which means that carriers are confined in 2 dimensions and are free to move along one direction.So they come under quantum wire
Si Nanowire (30 nm diameter, 2m length) , carriers are confined to 1 dimension and are free to move along the other 2 dimensions . So, they fall under quantum well.
Ga As Nanowire (50 nm diameter, 2 m length) , same as above
In As nanodot ( 50 nm diameter) , carriers are confined to all 3 directions