Tunneling electron induced chemisorption of copper phthalocyanine molecules on the Cu(111) surface

The adsorption of up to one monolayer (ML) of copper phthalocyanine (CuPc) molecules on a room temperature Cu(111) surface has been studied using scanning tunneling microscopy (STM). Below 1 ML the molecules are in a fluid state and are highly mobile on the surface. At 1 ML coverage the molecules co...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (7)
Main Authors: Stock, T., Nogami, J.
Format: Article
Language:English
Subjects:
ADSORPTION
Applied physics
CHEMISORPTION
Coalescing
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER
COPPER COMPLEXES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CRYSTALS
ELECTRIC POTENTIAL
ELECTRONS
LAYERS
MOLECULES
Organic chemistry
PHTHALOCYANINES
SCANNING TUNNELING MICROSCOPY
Surface chemistry
SURFACES
TEMPERATURE RANGE 0273-0400 K
TUNNEL EFFECT
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Summary:The adsorption of up to one monolayer (ML) of copper phthalocyanine (CuPc) molecules on a room temperature Cu(111) surface has been studied using scanning tunneling microscopy (STM). Below 1 ML the molecules are in a fluid state and are highly mobile on the surface. At 1 ML coverage the molecules coalesce into a highly ordered 2D crystal phase. At sub-ML coverages, chemisorption of individual CuPc molecules can be induced through exposure to tunneling electrons at a tunneling bias voltage exceeding a threshold value. This tunneling electron induced effect has been exploited to perform molecular STM lithography.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4866283