Thefinal product was collected by centrifugation and washed with acetone and then with water toremove most of the EG and PVP. During the washing process, the suspension was centrifugedat 14 000 rpm for either 10 or 30 min (depending on whether acetone or water was used) toremove the EG and the excess PVP. Finally, the precipitate was redispersed in deionized waterfor further use.Galvanic Replaceme