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The nanomesh visualised by Scanning Tunneling Microscopy

The BN nanomesh is a single layer, which is highly corrugated. The distance between the center of two
pores is 3.2 nanometers

On the left (a): BN nanomesh formed on rhodium.
On the right: nanomesh formed on ruthenium.
Both nanomeshes have similar sized. But on ruthenium
the nanomesh contains more defects, due to a stronger
interaction between the nanomesh and the substrate

3D plot of an STM image
Transition from bare rhodium
to surface covered with the nanomesh (brighter)

Perspective view of the nanomesh
(see previous image)
STM image of the nanomesh with two steps on the Rh(111) surface. Area: 80nmx80nm

Modelisation of the nanomesh

When borazine is evaporated at high temperature on transition metals (like rhodium or ruthenium), the BN rings assemble and form a hexagonal layer of BN on the metal

In a unit cell 13x13 BN and 12x12 Rh atoms are present

Map showing the height of the N atoms of nanomesh above a rhodium substrate. The atomical arrangement is given for the main
three regions
Atomical arrangement of nanomesh on rhodium of one
unit cell, delimited by black
lines in the left image

The nanomesh as a scaffold for clusters and molecules

Gold nanoclusters only take place in nanomesh pores
The nanomesh serves as scaffold for Naphthalocyanine molecules, which only adsorb
in the nanomesh pores

Evaporated C60 follow the nanomesh topography

Other measurements by LEED, UPS and STM

Local density of states (LDOS) measurements taken at energies corresponding to the sigma pics of UPS data enhances the wires or the pores

LEED measurement of
the bare rhodium

LEED measurement of the nanomesh on rhodium

| Last update: 25.03.2008 by C. Galli Marxer