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

Mehta et al. Nanoscale Research Letters 2008 4:17-28   doi:10.1007/s11671-008-9196-3