Highly-ordered covalent anchoring of carbon nanotubes on electrode surfaces by diazonium salt reactions

Our study demonstrates that the covalent attachment of vertically aligned SWCNTs on a GCE or a gold surface, achieved by diazonium salt couplings, is possible and gives rise to an efficient system. The approach described herein is facile, versatile, and results in stable surfaces in consistency with the known stability of tether layers grafted from diazonium salts. It was shown that the assembly of CNTs on the tethered layer increases the electronic coupling between the electrode and the redox species in solution. Furthermore, this study highlights the suitability of SWCNTmodified electrodes for the successful development of biomaterial-based hybrid systems that are highly promising for future biotechnological applications