Nanoscale chemical patterning of graphite at different length scales

Abstract

A combination of covalent and non-covalent strategy was used to achieve nanoscale chemical patterning of graphite at multiple length scales: few hundred nanometer circular patterns interspersed with sub-10 nm linear arrays.

Micro-patterning of C–C covalently-bound grafts by mechanochemical imprint lithography

“…Currently, the research is focused on the approaches to control not only the chemistry and surface density of functional grafts, but also their spatial order. Bottom-up strategies for patterned covalent functionalization rely on the design of special radical precursors, 9 molecular building blocks 10 or larger aggregates 11 capable of on-surface self-assembly. Upon activation of aryl radicals, such on-surface adsorbates lead to patterned grafting that matches the symmetry and dimensions of the initial self-assembly, albeit with limitations that arbitrary shapes are not possible, and that for each new pattern one has to design and optimize another new ‘molecular assembly-grafting’ system.…”