Ambient STM Studies of Alkane Derivatives on HOPG

Functional Groups and Self_Assembly at the Liquid/Solid Interface

Key results & Motivation for Analogous UHV Studies

_ Self_assembly into regular patterns, all trans & flat chains, closely packed into lamellae

_ Important interactions between functional groups of neighboring adsorbate molecules:

Hydrogen_bonding (acids form dimers, alcohols extended networks)

Formation of bromine-pairs

Theoretical prediction: Important electrostatic contribution

Are these reflected in adsorption energies ?

_ Solvent influence negligible unless coadsorption

_ Patterns assumed to represent global energy minimum

Low temperature behavior / Local minima ?

_ Short chains ?

Previous slide

Next slide

Back to first slide

View graphic version