Figure 2.

a UV–vis absorption spectrum of BSA, BSA–Cu2+, BSA–CuSe at 24 h, BSA–CuSe at 48 h, BSA–CuSe at 72 h, BSA–CuSe at 96 h; b The change of absorbance at 190 nm

Huang et al. Nanoscale Research Letters 2010 5:949-956   doi:10.1007/s11671-010-9587-0