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Journal Article
Trapping and moving metal atoms with a six-leg molecule
2005
Overview
Putting to work a molecule able to collect and carry adatoms in a controlled way on a surface is a solution for fabricating atomic structures atom by atom. Investigations have shown that the interaction of an organic molecule with the surface of a metal can induce surface reconstruction down to the atomic scale
1
,
2
,
3
,
4
,
5
. In this way, well-defined nanostructures such as chains of adatoms
2
, atomic trenches
3
,
4
and metal–ligand compounds
5
have been formed. Moreover, the progress in manipulation techniques
6
,
7
,
8
,
9
,
10
induced by a scanning tunnelling microscope (STM) has opened up the possibility of studying artificially built molecular-metal atomic scale structures
11
,
12
, and allowed the atom-by-atom doping of a single C
60
molecule by picking up K atoms
13
. The present work goes a step further and combines STM manipulation techniques with the ability of a molecule to assemble an atomic nanostructure. We present a well-designed six-leg single hexa-
t
-butyl-hexaphenylbenzene (HB-HPB) molecule
14
, which collects and carries up to six copper adatoms on a Cu(111) surface when manipulated with a STM tip. The ‘HB-HPB-Cu atoms’ complex can be further manipulated, bringing its Cu freight to a predetermined position on the surface where the metal atoms can finally be released.
Publisher
Nature Publishing Group UK,Nature Publishing Group
