Flavel, BS, Garrett, DJ, Lehr, J 
ORCID: https://orcid.org/0000-0001-5698-7244, Shapter, JG and Downard, AJ
2010,
'Chemically immobilised carbon nanotubes on silicon : stable surfaces for aqueous electrochemistry'
, Electrochimica Acta, 55 (12)
, pp. 3995-4001.
Abstract
Diazonium ion chemistry has been used to electrochemically graft aminophenyl layers onto p-type silicon (1 0 0) substrates. A condensation reaction was used to immobilise single-walled carbon nanotubes with high carboxylic acid functionality directly to this layer. Electrochemical monitoring of the aminophenyl groups confirmed the formation of an amide linkage between the single-walled carbon nanotubes and the aminophenyl layer. The carbon nanotube electrode showed high stability and good electrochemical performance in aqueous solution. At moderate scan rates the Ru(NH3)6+3/+2 couple exhibited quasi-reversible electron transfer kinetics with a standard heterogenous rate constant of 1.2 × 10−3 cm s−1 at the covalently-linked carbon nanotube surface. The electrode thus combines the advantages of a silicon substrate for easy integration into sophisticated electrical and electronic devices, carbon nanotubes for desirable electrochemical properties, and stability in aqueous medium for future applications in environmental sensing.
| Item Type: | Article |
|---|---|
| Schools: | Schools > School of Computing, Science and Engineering |
| Journal or Publication Title: | Electrochimica Acta |
| Publisher: | Elsevier |
| ISSN: | 0013-4686 |
| Related URLs: | |
| Depositing User: | J Lehr |
| Date Deposited: | 11 Aug 2021 11:43 |
| Last Modified: | 27 Aug 2021 21:20 |
| URI: | http://usir.salford.ac.uk/id/eprint/50523 |
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