Figure 4.

a UV–vis absorption and b PL spectrum of the product obtained at Zn:S of 3:1 (core–shell nanostructured ZnS) and 1:3 (cubic sphalerite ZnS)

Yang et al. Nanoscale Research Letters 2010 5:1124-1127   doi:10.1007/s11671-010-9612-3