Electrochemically assisted fabrication of size-exclusion films of organically modified silica and application to the voltammetry of phospholipids.
作者： B. Layla Mehdi , Iwona A. Rutkowska , Pawel J. Kulesza , James A. Cox
DOI: 10.1007/S10008-013-2077-4
关键词:
摘要: Modification of electrodes with nanometer-scale organically modified silica films pore diameters controlled at 10- and 50-nm is described. An oxidation catalyst, mixed-valence ruthenium oxide cyano cross-links or gold nanoparticles protected by dirhodium-substituted phosphomolybdate (AuNP-Rh2PMo11), was immobilized in the pores. These systems comprise size-exclusion which biological compounds, phosphatidylcholine cardiolipin, were electrocatalytically oxidized without interference from surface-active concomitants such as bovine serum albumin. Ten-nanometer pores obtained adding generation-4 poly(amidoamine) dendrimer, G4-PAMAM, to a (CH3)3SiOCH3 sol. Fifty-nanometer modifying glassy carbon electrode (GC) sub-monolayer film aminopropyltriethoxylsilane, attaching diameter poly(styrene sulfonate), PSS, spheres protonated amine, transferring this sol, electrochemically generating hydronium uncoated GC sites, catalyzed ormosil growth around PSS. Voltammetry Fe(CN)63− Ru(NH3)63+ demonstrated absence residual charge after removal templating agents. With system, structure sufficiently defined use layer-by-layer electrostatic assembly AuNP-Rh2PMo11 therein. Flow injection amperometry cardiolipin analytical utility these electrodes.
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