Hanan Al-Kutubi, Silvia Voci, Liza Rassaei, Neso Sojic, Klaus Mathwig

Chem .Sci., 9, 2018, (2018 Chemical Science HOT Article Collection)

Microfabricated nanofluidic electrochemical devices offer a highly controlled nanochannel geometry; they confine the volume of chemical reactions to the nanoscale and enable greatly amplified electrochemical detection. Here, the generation of stable light emission by electrochemiluminescence (ECL) in transparent nanofluidic devices is demonstrated for the first time by exploiting nanogap amplification. Through continuous oxidation and reduction of [Ru(bpy)3]2+ luminophores at electrodes positioned at opposite walls of a 100-nm nanochannel, we compare classic redox cycling and ECL annihilation. Enhanced ECL light emission of attomole luminophore quantities is evidenced under ambient conditions due to the spatial confinement in a 10-femtoliter volume, resulting in a short diffusion timescale and highly efficient ECL reaction pathways at the nanoscale.

Annihilation

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Thumbnail N. Sojic BOOK Royal Society of Chemistry Electrogenerated chemiluminescence (ECL) is a powerful and versatile analytical technique, which is widely applied for biosensing and successfully...
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Fibre-optic Biosensors
21 January 2013
Thumbnail Sojic N.,In Chemical Sensors and Biosensors, Eds. R. Lalauze and N. Jaffrezic-Renault, ISTE-Wiley, London, 2012. Book Chapter Technological needs for chemical, ionic and biological species...
Thumbnail Sojic N., Kuhn A.,Techniques de l’Ingénieur, Référence P150, 2012. Les capteurs sont devenus indispensables pour de nombreux aspects de notre vie, avec des exemples d’application allant de la...
Thumbnail Heim M., Kuhn A.,In Handbook of Electrochemistry, Springer, in press, 2013. Book Chapter In recent years, the field of highly ordered macroporous thin films coated onto solid electrode surfaces...