Question

Formula to determine particle size of quantum dots using band gap

Answer 1

hope this helps you
However, just one idea knocked in my head. Most probably it does work. First get a standard curve based on excitation wavelength VS particle size of different QDs (blue,green, yellow,red). Then you can take UV spectrum of your unknown QDs. From the standard curve you may a get particle size data (it may not appropriate, i assume).

As you know there is a direct relation between excitation wavelength and particle size of QDs. However, before doing this try to find some reference either exist or not