What is the value of exponent (n) in Tauc relationfor the calculation of optical band gap of gold nanoparticles?

Actually I want to know the value of exponent (n) in Tauc relation for Au nanoparticles (among n values 1/2, 2, 3/2 and 3 corresponding to the allowed direct, allowed indirect, forbidden direct...

04 April 2015 4,245 12 View