Ben-Amor S., Devin A., Rigoulet M., Sojic N., Arbault S.,
Electroanalysis 2013, 25, 656-663.

Hydrogen peroxide is a major bio-active molecule produced by mitochondria during aerobic metabolism. In order to monitor that production, platinized ultramicroelectrodes with high surface-area were used. Their sensitivity was significantly improved following an oxygen plasma treatment. Cyclic voltammetry and chrono-amperometry analyses of ferricyanide reduction and hydrogen peroxide oxidation showed that ultramicroelectrodes’ capacitive current was decreased 3-fold, while faradic currents remained constant. Then, plasma-treated ultramicroelectrodes allowed the chrono-amperometric detection of 100 nM H2O2 injections. This eventually enabled monitoring mitochondria release of H2O2 following injection of substrates and a respiratory inhibitor; a flux of few hundreds picomoles H2O2/mg protein/min was detected.

 

Electroanalysis2013 p656 TOC

Thumbnail Schmitt V., Ravaine V.,Curr. Opin. Colloid Interface Sci. 2013, 18, 532–541. Review Colloidal gel particles called microgels have shown their ability to adsorb at an oil–water interface and...
Thumbnail Husken N., Taylor R. W., Zigah D., Taveau J.-C., Lambert O., Scherman O. A., Baumberg J. J., Kuhn A.,Nano Lett. 2013, 13, 6016–6022. One-dimensional (1D) nanoparticle chains with defined...
Thumbnail Chen K., Adam C., Sojic N., Schmittel M.,RSC Adv. 2013, 33, 24140–24145. For remote Hg2+ detection, an array of nanotips was covalently functionalised using a versatile photochemical approach. After...
Thumbnail Destribats M., Wolfs M., Pinaud F., Lapeyre V., Sellier E., Schmitt V., Ravaine V.,Langmuir 2013, 29, 12367–12374. This work reports a new evidence of the versatility of soft responsive...
Thumbnail Suraniti E., Kanoufi F., Gosse C., Zhao X., Dimova R., Pouligny B., Sojic N.,Anal. Chem. 2013, 85, 8902–8909. Editors' Highlight ! Latex micrometric beads are manipulated by optical tweezers in the...
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Thumbnail Shu Q., Adam C., Sojic N., Schmittel M.,Analyst 2013, 138, 4500-4504. An electrochemiluminescent sensing scheme is presented for remote detection of Hg2+ through an ITO-coated nanostructured...
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Thumbnail Mokrushina A. V., Heim M., Karyakina E. E., Kuhn A., Karyakin A. A.,Electrochem. Comm. 2013, 29, 78-80. We report on the successful modification of macroporous microelectrodes with the...
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Thumbnail Bon Saint Côme Y., Lalo H., Wang Z., Kohring G.W, Hempelmann R., Etienne M., Walcarius A., Kuhn A., Electroanalysis 2013, 25, 621-629. Gold nanoparticles have been co-encapsulated with d-sorbitol dehydrogenase...