Protein electrochemistry using aligned carbon nanotube arrays.
The remarkable electrocatalytic properties and small size of carbon nanotubes make them ideal for achieving direct electron transfer to proteins, important in understanding their redox properties and in the development of biosensors. Here, we report shortened SWNTs can be aligned normal to an electrode by self-assembly and act as molecular wires to allow electrical communication between the underlying electrode and redox proteins covalently attached to the ends of the SWNTs, in this case, microperoxidase MP-11. The efficiency of the electron transfer through the SWNTs is demonstrated by electrodes modified with tubes cut to different lengths having the same electron-transfer rate constant.
Gooding
J Justin
JJ
School of Chemical Sciences, The University of New South Wales, Sydney, NSW 2052, Australia. justin.gooding@unsw.edu.au
Wibowo
Rahmat
R
Liu
Jingquan
J
Yang
Wenrong
W
Losic
Dusan
D
Orbons
Shannon
S
Mearns
Freya J
FJ
Shapter
Joe G
JG
Hibbert
D Brynn
DB
D015374:Biosensing Techniques; D003543:Cysteamine / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction; D010544:Peroxidases / Q000737:chemistry*
D037742:Nanotubes, Carbon; D003543:Cysteamine; D010544:Peroxidases; C021799:microperoxidase