Steering
On-Surface Supramolecular Nanostructures by <i>tert</i>-Butyl
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Abstract
Molecular
self-assembly is an efficient approach to fabricate supramolecular
nanostructures on well-defined surfaces. The nanostructures can be
regulated through functionalizing the molecular precursors with different
functional groups. Here, from an interplay of high-resolution scanning
tunneling microscopy imaging and density functional theory calculations,
we have at the atomic scale investigated the influence of <i>tert</i>-butyl groups on the on-surface self-assembled behaviors
of the organic molecules where intermolecular interactions mainly
originate from relatively weak van der Waals interactions. Our results
demonstrate that the <i>tert</i>-butyl groups can not only
affect the adsorption geometry but also change the self-assembled
properties of organic molecules on surfaces due to the enhanced intermolecular
interactions