Figure 8.

Absorption spectra of ZnS nanoparticles (a) After different times of UV-irradiation at 254 nm; (1) 0 min, (2) 30 min, (3) 60 min and (4) 90 min. (b) After irradiation at different wavelength for 1 h

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