The growth of free silver nanoclusters is studied by molecular dynamics sim
ulations, from a small seed up to sizes N similar or equal to 150. It is Sh
own that the final outcome of the growth process depends crucially on the g
rowth conditions (deposition flux phi and temperature T). A reentrant morph
ology transition is obtained: at intermediate values of T and phi a "decahe
dral window" is found; the window is surrounded by regimes where icosahedra
are preferentially grown.