Electrochemistry of polystyrene intercalated vertically aligned single- and double-walled carbon nanotubes on gold electrodes
Katherine E Moore, Benjamin S Flavel, Cameron J Shearer, Amanda V Ellis, Joseph G Shapter
ELECTROCHEMISTRY COMMUNICATIONS | ELSEVIER SCIENCE INC | Published : 2011
Electrochemical electrodes incorporating double- and single-walled carbon nanotubes (CNTs) were fabricated on cysteamine modified flat gold substrates. Through covalent coupling of the amine end groups with carboxyl functionalized CNTs, a dense forest of vertically aligned CNTs was produced. To these a 30 nm thick insulating polystyrene layer was spin coated, resulting in exposure of the uppermost carbon nanotube ends. The electrochemical performance of each electrode was then determined using the redox probe ruthenium hexaamine. Once surrounded by polymer, the double-walled CNTs (DWCNTs) showed an improved electron transfer rate, compared to the single-walled electrode. This improvement was..View full abstract
KM wishes to thank the Australian Government for an APA scholarship as well as the Playford Memorial Trust for a top up scholarship. This work is supported by the Australian Microscopy and Microanalysis Research Facility (AMMRF).