Movies
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Build-up of a circular quantum corral
using 36 Ag atoms on a Ag(111) surface. The atoms are manipulated laterally in the
pulling mode. Note that individual atoms from the lower part are used for the
construction of the circle and that the single atom initially in the center of
the circle is finally used to complete the ring. Note also the standing
electron wave pattern in the ring stemming from the surface localized electron
state on Ag(111).
Build-up of the millenium number"2000"
using 47 CO-molecules. The molecules are laterally manipulated
in the pushing mode, whereby the step edges of the Cu(211) substrate act as
railway trails.
STM picture of a Cu(111) surface,
in whose upper right part the STM tip
has been gently dipped in the substrate thus creating a crater with Cu single
atoms and Cu-clusters spread around in its neighbourhood.
A "quantum resonator" consisting of two parallel rows of Cu-atoms is
built in an atom by atom fashion. The foreign species marked in the previous
STM picture serves as a marker. A larger cluster of Ag atoms is used as an
atomic quarry, from which single atoms are pulled out and used for the
construction of the resonator.
The localized electron surface state on the (111) noble metal surfaces gives rise
to a indirect oscillatory interaction between individual adatoms, whereby the
first minimum is close to half the wavelength of the electrons in the surface
state at the Fermi energy. In clusters of adatoms this distance is therefore
often observed. Thermal activation at higher temperatures causes the atoms to
move, so that the shape of the cluster is continuously changing. The film
refers to Cu atoms on a Cu(111) substrate. ,
Animation of the Ullmann recation performed with single molecules. All
reaction steps including dissociation of parent iodobezene, motion of phenyl
reactants and iodine byproducts as well as association of phenyl reactants to
biphenyl are induced with an iodine functionalized tip. The iodine atom taken to the tip
with the technique of vertical manipulation is released back to the Cu(111)
substrate in the final step. Corresponding original STM pictures of the different
stages are shown on the left.
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