Dioctylamine-sulfonamide-modified carbon nanoparticles as high surface area substrates for coenzyme Q10-lipid electrochemistry

Katherine Lawrence, John D Watkins, Tony D James, James E Taylor, Steven D Bull, G W Nelson, J S Foord, Y T Long, Frank Marken

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Dioctylaminesulfonamide-modified carbon nanoparticles are characterised and employed as high surface area substrate for (i) coenzyme Q10 and (ii) 1,2-dimyristoyl-sn-glycero-3-phosphocholine (or DMPC) - Q10 redox processes. The carbon nanoparticles provide a highly hydrophobic substrate with ca. 25Fg -1 capacitance when bare. Q10 or DMPC-Q10 immobilised onto the carbon nanoparticles lower the capacitance, but give rise to well-defined pH-dependent voltammetric responses. The DMPC-Q10 deposit shows similar characteristics to those of Q10, but with better reproducibility and higher sensitivity. Both redox systems, Q10 and DMPC-Q10, are sensitive to the Na + concentration in the electrolyte and mechanistic implications are discussed.
Original languageEnglish
Pages (from-to)1003-1010
Number of pages8
JournalElectroanalysis
Volume24
Issue number5
DOIs
Publication statusPublished - 2012

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