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Area-selective passivation of sp2 carbon surfaces by supramolecular self-assembly
Zhi Li1, Hans Van Gorp, Peter Walke
1Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven-University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium. oleksandr.ivasenko@kuleuven.be steven.defeyter@kuleuven.be stmerten@gmail.com.
Abstract:
Altering the chemical reactivity of graphene can offer new opportunities for various applications. Here, we report that monolayers of densely packed n-pentacontane significantly reduce the covalent grafting of aryl radicals to graphitic surfaces. The effect is highly local in nature and on fully covered substrates grafting can occur only at monolayer imperfections such as interdomain borders and vacancy defects. Grafting partially covered substrates primarily results in the covalent modification of uncoated areas.