Figure 2

(a) Tauc plots for the determination of optical band gap of ZnS nanoparticles prepared in 1.5 mM aqueous CTAB. [ZnS]: (1) 0.1 mM, (2) 0.2 mM, (3) 0.3 mM, (4) 0.4 mM, (5) 0.5 mM, (6) 0.6 mM, (7) 0.7 mM. (b) Photoluminescence spectra of ZnS nanoparticles in (1) aqueous micellar solution (2) redispersed in water. Inset shows absorption spectrum of ZnS nanoparticles (0.5 mM) redispersed in water