Dioctylamine-Sulfonamide-Modified Carbon Nanoparticles as High Surface Area Substrates for Coenzyme Q10-Lipid Electrochemistry

作者：Lawrence, Katherine; Watkins, John D.; James, Tony D.; Taylor, James E.; Bull, Steven D.; Nelson, Geoffrey W.; Foord, John S.; Long, Yi-Tao; Marken, Frank^*

来源：Electroanalysis, 2012, 24(5): 1003-1010.

DOI：10.1002/elan.201200121

• Voltammetry
• Q10
• DMPC
• Carbon nanoparticles
• Lipid
• Thin film
• Cell wall
• Membrane
• pH
• Double layer
• Hydrophobicity

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. 25 Fg-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.

• 出版日期2012-5
• 单位华东理工大学