Quantification of the surface geometry of gold nanospikes as a function of deposition time^a.

Electrodeposition time (s)	Spacing (nm)	Height (nm)	Cap radius (nm)	Base radius (nm)	Density (/μm2)	R a (nm)
360	120 ± 84	103 ± 36	45 ± 32	47 ± 38	26.6	34.0
540	211 ± 120	302 ± 57	60 ± 13	89 ± 29	16.0	93.0
720	312 ± 145	416 ± 112	94 ± 71	112 ± 82	11.8	109.6
900	355 ± 136	555 ± 214	103 ± 82	115 ± 86	9.1	180.0

^a R _a: roughness analysis.