Abstract
The influence of halides (I-, Br-, Cl-) on the stability of C-60
adlayers on Au(1 1 1) was studied by scanning tunneling microscopy (STM)
in air at room temperature. The C-60 layers on gold were immersed into
alkali halides solutions of several concentrations for different time
intervals. The results show that C-60 can be removed from the gold
surface by iodide when the halide concentration is high and time of
immersion is long. A rotated hexagonal structure of iodide is formed on
some surface areas although with distortion. Bromide and chloride do not
remove C-60 completely from the gold surface. Nevertheless, they are
able to penetrate the C-60 layer. The result is that bromide and
chloride adsorb on top of the gold and C-60 sits on the halide adlayer.
This condition enables the growth of well organized domains of C-60. It
is possible to identify the formation of multilayers of the fullerene on
some areas. Intramolecular resolution for C-60 was attained in the STM
images when the halides were present on the surface. (C) 2013 Elsevier
B.V. All rights reserved.
Users
Please
log in to take part in the discussion (add own reviews or comments).