TABLE 2:

Multiexnonential Intensity Decays for CdS Nanonarticles

nanoparticle/excitation	$\overline{\tau }$ (ns)a	α1	τ1 (ns)	α2	τ2 (ns)	α3	τ3 (ns)	χR2
CdS/dendrimer exc. 771 nm (1PE)	128.9	0.757	9.2	0.230	85.5	0.013	431.1	1.8
exc. 771 nm (2PE)	122.1	0.785	10.0	0.201	94.8	0.014	382.9	1.4
CdS/Cd2+ rich exc. 386 nm (1PE)	173.9	0.837	8.8	0.123	83.9	0.040	334.2	1.2
exc. 773 nm (2PE)	165.5	0.839	8.8	0.122	81.1	0.039	324.1	2.5

^a$\overline{\tau }=\sum f_i{\tau }_i,f_i({\alpha }_i{\tau }_i∕\sum {\alpha }_j{\tau }_j).$