On the role of functional groups in the formation of diazonium based covalent attachments: dendritic <i>vs.</i> layer-by-layer growth
Thi Mien Trung Huynh, Kazukuni Tahara, Steven De Feyter, Thanh Hai Phan
Abstract
simulations. Spectroscopy and in particular microscopy approaches are underrepresented. Herein, we demonstrate a comparative characterization of the multilayer growth of two diazonium derivatives on highly oriented pyrolytic graphite using a combination of cyclic voltammetry, atomic force microscopy, and scanning tunneling microscopy. While dendritic growth is observed for 4-nitro phenyl diazonium (4-NBD), 4-carboxy phenyl diazonium (4-CBD) shows layer-by-layer growth upon increasing the molecular concentration, revealing the impact of the functional groups on the growth mechanism.
Topics & Concepts
Highly oriented pyrolytic graphiteArylChemistryLayer (electronics)Scanning tunneling microscopeCyclic voltammetryLayer by layerCovalent bondPyrolytic carbonPolymer chemistryChemical engineeringPhotochemistryGraphiteMaterials scienceNanotechnologyElectrochemistryOrganic chemistryAlkylPhysical chemistryEngineeringPyrolysisElectrodeMolecular Junctions and NanostructuresGraphene research and applicationsQuantum Dots Synthesis And Properties