Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 87: Solid-liquid interfaces: Structure, spectroscopy

O 87.9: Vortrag

Donnerstag, 12. März 2026, 17:00–17:15, TRE/PHYS

Charging dynamics of the electrical double-layer in nanometre sized channels — •Marco Schönig, Serge Lemay, and Marc Koper — Leiden University, Leiden, The Netherlands

Nanoporous electrodes play a crucial role in modern energy storage and conversion technologies. However, despite their ubiquitous usage, the impact of nanoscale geometrical confinement on their electrochemical properties remains poorly understood. This is particularly relevant when the pore dimensions become so confined that the double layers of opposing sides overlap. A key challenge in studying this phenomenon in a systematic manner is the necessary precise control of the experimental dimensions[1]. We aim to bridge this gap by utilizing modern nanofabrication techniques to fabricate model gold slit electrodes[2].

In this contribution, we present the charging behaviour of electrodes with 5 - 20 nm wide slits, under confined and unconfined conditions. We further explore the usage of ATR-IR spectroscopy to probe the electrolyte in the slit electrodes by using micro-grooved Si wafers as substrate[3].

References [1] J. Wordsworth et al. Angew. Chem. Int. Ed. 2022, 61, e202200755; [2] L. Rassaei et al. J. Phys. Chem. C 2012, 116, 10913; [3] T. A. Morhart et al. Anal. Chem. 2017, 89, 11818.

Keywords: Confinement; Double-layer; Lithography; ATR-SEIRAS