1. L.E. Brus, A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites. J. Chem. Phys. 79(11), 5566–5571 (1983)
2. A.L. Efros, A.L. Efros, Interband light absorption in a semiconductor sphere. Sov. Phys. Semicond. 16(7), 772–775 (1982)
3. A.I. Ekimov, A.A. Onushchenko, Quantum size effect in the optical-spectra of semiconductor micro-crystals. Sov. Phys. Semicond. 16(7), 775–778 (1982)
4. R.C. Ashoori, Electrons in artificial atoms. Nature 379(6564), 413–419 (1996)
5. U. Banin, Y.W. Cao, K. David, O. Millo, Identification of atomic-like electronic states in indium arsenide nanocrystal quantum dots. Nature 400(6744), 542–544 (1999)