Publication date: 15th December 2025
Electrochemical (EC) technologies play a central role in modern energy and industrial processes, including hydrogen fuel cells, catalytic exhaust treatment, and the electrochemical synthesis of functional molecules. Their performance is governed by nanoscale surface characteristics—morphology, surface area, composition, and local acidity/basicity—which can vary markedly across heterogeneous materials.¹,² Consequently, nanoscale‑resolved characterization is essential to establish reliable structure–activity relationships. Scanning Electrochemical Cell Microscopy (SECCM), first introduced by Daviddi, Unwin et al.,³ enables nm‑scale mapping by confining an electrolyte meniscus at a nanopipette tip. This poster showcases examples from the literature demonstrating the versatility of Park Systems’ SECCM across diverse materials and application fields, and how intrinsic limitations can be overcome through practical method development.
SECCM offers valuable insights into the nanoscale behavior of various electrochemical materials. The easy switching between a pipette holder and a cantilever holder enables combining SECCM with AFM techniques, facilitating correlative measurements that link topography/mechanics with local electrochemical activity on the same region of interest.4,5 In terms of spatial fidelity, while the lateral resolution is limited by the pipette aperture, a simple oil‑coating markedly reduces the effective droplet size and contact area, delivering drastic gains in resolution—with representative datasets moving from ~400 nm pixel sizes to ~32 nm, and sub‑10 nm pixel sizes reported under optimized conditions.6
For stable surface tracking without sacrificing electrochemical sensitivity, a compact double‑barrel configuration can be adopted: an AC bias between barrels provides an independent topography feedback, while a DC bias to the sample records the Faradaic current.7 Measurements on HOPG at different applied bias illustrate the correlation of topography and electrochemical activity with improved lateral resolution and mapping stability.
Together, these advances establish SECCM as a robust, multimodal platform for high‑resolution nanoscale electrochemical characterization across a wide range of materials.
1. Avelino, C. Chem. Rev. 97, 2373–2420 (1997).
2. .Xia, Y., Xiong, Y., Lim, B. & Skrabalak, Angew. Chemie Int. Ed. 48, 60–103 (2009).
3. Ebejer, N., Schnippering, M., Colburn, A. W., Edwards, M. A. & Unwin, P. R. Anal. Chem. 82, 9141–9145 (2010).
4 . Brunet Cabré, Electrochim. Acta 393, (2021).
5. Saleh, S., Daboss, S., Kranz, C. et al.. ChemElectroChem 12, (2025).
6. Liu, G. et al.. Sensors Actuators B Chem. 409, 135603 (2024)
7. Application Note 95, Park Systems
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