We have investigated the island growth of Au on the van der Waals surf
aces of WS2 and WSe2 by STM. We show how the STM can be used to image
as well as to manipulate nm-sized crystallites on these atomically smo
oth non-reactive substrates. The islands on the van der Waals planes a
re triangular in shape and are well aligned with the substrate lattice
. Statistical analysis of our data yield subtle differences in the gro
wth of Au on WS2 compared to WSe2. (C) 1998 Elsevier Science B.V. All
rights reserved.