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Dioctylamine‐Sulfonamide‐Modified Carbon Nanoparticles as High Surface Area Substrates for Coenzyme Q10Lipid Electrochemistry
Author(s) -
Lawrence Katherine,
Watkins John D.,
James Tony D.,
Taylor James E.,
Bull Steven D.,
Nelson Geoffrey W.,
Foord John S.,
Long YiTao,
Marken Frank
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200121
Subject(s) - coenzyme q10 , chemistry , substrate (aquarium) , nanoparticle , electrochemistry , electrolyte , redox , carbon fibers , chemical engineering , inorganic chemistry , materials science , nanotechnology , electrode , biochemistry , engineering , composite material , oceanography , geology , composite number
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.