Single-layer graphene as a stable and transparent electrode for nonaqueous radical annihilation electrogenerated chemiluminescence

Langmuir : the ACS Journal of Surfaces and Colloids
Teresa C CristarellaJoaquín Rodríguez-López

Abstract

We explored the use of single-layer graphene (SLG) obtained by chemical vapor deposition, and transferred to a glass substrate, as a transparent electrode material for use in coupled electrochemical and spectroscopic experiments in nonaqueous media through electrogenerated chemiluminescence (ECL). SLG was used with classical ECL luminophores, rubrene and 9,10-diphenylanthracene, in an inert environment to generate stable electrochemical responses and measure light emission through it. As an electrode material, SLG displayed excellent stability during electrochemical potential stepping and voltammetry in a window that spanned at least from ca. -2.4 to +1.8 V versus SCE in acetonitrile and acetonitrile/benzene. Although the peak splitting between forward and reverse sweeps in voltammetry was larger in comparison to metal electrodes due to in-plane resistance, SLG displayed sufficiently facile electron transfer properties to yield stable voltammetric cycling and ECL. SLG electrodes patterned with poly tetrafluoroethylene permitted the stable generation of radical ions on an SLG microelectrode to be studied through scanning electrochemical microscopy in the generation/collection mode. SLG was able to stably collect radical ions pro...Continue Reading

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Citations

Jun 18, 2017·Chemical Society Reviews·Amir KaplanMichael S Strano
Dec 16, 2017·Analytical Chemistry·Cheng MaJun-Jie Zhu
Oct 10, 2018·Journal of the American Chemical Society·Jingshu HuiJoaquín Rodríguez-López
Oct 25, 2017·Journal of the American Chemical Society·Giovanni ValentiNeso Sojic

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