Table 1.

Sizes and highest concentrations (c0) of the different silver material preparations used.

Name	Length	Diameter	[particles/ml]	[nm²/ml]	[mg/ml]
Spheres	-	30 nm	2.3·1012	9·1015	0.33
Powder	-	< 45 μm	2.1·105	5.9·1014 +	13.5
SW 1.5 μm	max. 1.5 μm	152 nm	5.5·1010	4.1·1016	15.47
SW 5 μm	max. 5 μm	126 nm	1.8·1010	3.6·1016	11.84
SW 6.5 μm*	6.5 μm	102 nm	9.1·109	1.9·1016	5.055
SW 8 μm	max. 8 μm	158 nm	9.1·109	3.6·1016	14.88
SW 12a μm	max. 12 μm	106 nm	6.8·109	2.7·1016	7.52
SW 12b μm	max. 12 μm	140 nm	6.8·109	3.6·1016	13.17
SW 12c μm*	12 μm	132 nm	9.1·109	4.6·1016	15.26
SW 25 μm	max. 25 μm	115 nm	6.8·109	5.5·1016	16.47

SW = silver wire. * used for calcium imaging only. ⁺Calculated surface area, for the microparticles the aggregation will have reduced this value.