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Enhanced annihilation electrochemiluminescence by nanofluidic confinement

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Abstract

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.

Graphical abstract: Enhanced annihilation electrochemiluminescence by nanofluidic confinement

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Publication details

The article was received on 19 Jul 2018, accepted on 30 Sep 2018 and first published on 01 Oct 2018


Article type: Edge Article
DOI: 10.1039/C8SC03209B
Citation: Chem. Sci., 2018, Advance Article
  • Open access: Creative Commons BY-NC license
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    Enhanced annihilation electrochemiluminescence by nanofluidic confinement

    H. Al-Kutubi, S. Voci, L. Rassaei, N. Sojic and K. Mathwig, Chem. Sci., 2018, Advance Article , DOI: 10.1039/C8SC03209B

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