Nano & Solid State Physics: Benefits, Comparisons, & Country Rankings

[amjad-sh]

Hello,
In which way nano and solid state physics improve technology?
where we use statistical physics more in nano physics or particle physics?
where we use quantum mechanics more in nano physics or particle physics?
which major is more enjoyable nano or particle physics?
which major is more deeper nano or particle physics?
which one of these countries is the best in nano physics:
USA,France,Switzerland,UK,Russia,Sweden,Japan,Iran?
THANKS.

 

[Vanadium 50]

What research have you done on these questions?

 

[amjad-sh]

What research have you done on these questions?

I didn't.
I just want to gather opinions.

 

[QuantumCurt]

which major is more enjoyable nano or particle physics?
which major is more deeper nano or particle physics?

I don't believe there really is such a thing as a nano physics major or a particle physics major.