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Issue 48, 2018
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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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Supplementary files

Article information


Submitted
19 Jul 2018
Accepted
30 Sep 2018
First published
01 Oct 2018

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2018,9, 8946-8950
Article type
Edge Article

Enhanced annihilation electrochemiluminescence by nanofluidic confinement

H. Al-Kutubi, S. Voci, L. Rassaei, N. Sojic and K. Mathwig, Chem. Sci., 2018, 9, 8946
DOI: 10.1039/C8SC03209B

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