TABLE 2.

Lifetime Data for Free Fluorophores (10 nM) and Bound Fluorophores on Metal Particles (0.5 nM) in Water at pH = 7^a

Samples	τi (ns)	αi	〈τ〉(ns)	χR2
Alexa Fluor Fluor 350 in water	2.38		2.38	1.0
Alexa Fluor Fluor 350 on 40 nm silver particle	2.88	0.13	0.69	1.3
	0.38	0.87
Pacific Blue in water	2.37		2.37	1.0
Pacific Blue on 40 nm silver particle	2.81	0.01	0.29	1.2
	0.25	0.99
Fluorescein in water	3.11		3.11	1.1
Fluorescein on 40 nm silver particle	4.09	0.09	0.73	1.2
	0.39	0.91
Alexa Fluor Fluor 514 in water	3.89		3.89	1.3
Alexa Fluor Fluor 514 on 40 nm silver particle	3.94	0.08	0.93	1.0
	0.67	0.92
Rhodamine 6G in water	4.01		4.01	1.1
Rhodamine 6G on 40 nm silver particle	4.39	0.06	0.86	1.3
	0.64	0.94
Alexa Fluor Fluor 647 in water	1.24		1.24	1.1
Alexa Fluor Fluor 647 on 40 nm silver particle	1.93	0.05	0.42	1.3
	0.34	0.95
Alexa Fluor Fluor 680 in water	1.23		1.23	1.1
Alexa Fluor Fluor 680 on 40 nm silver particle	2.22	0.12	0.57	0.9
	0.35	0.88

^aThe loading numbers were close to 20 for all samples.