This provoked the formation
of insoluble clotted structure after about one
month for the polymerization of neutral decarboxylated
CPI. SEM studies of this structure (Fig. 3a) have showed
the formation of spheroidal particles of different sizes and
twisted into fibrous structures with regular gold distribution
as demonstrated by electron backscattered image in
Fig. 3c. To explain the nature of these fibrous structures,
for comparison, a colloidal gold solution using standard
procedure for the reduction with sodium citrate