Issue 8, 2023

Inkjet-printed 3D micro-ring-electrode arrays for amperometric nanoparticle detection

Abstract

Chip-based impact electrochemistry can provide means to measure nanoparticles in solution by sensing their stochastic collisions on appropriately-polarized microelectrodes. However, a planar microelectrode array design still restricts the particle detection to the chip surface and does not allow detection in 3D environments. In this work, we report a fast fabrication process for 3D microelectrode arrays by combining ink-jet printing with laser-patterning. To this end, we printed 3D pillars from polyacrylate ink as a scaffold. Then, the metal structures are manufactured via sputtering and laser-ablation. Finally, the chip is passivated with a parylene-C layer and the electrode tips are created via laser-ablation in a vertical alignment. As a proof of principle, we employ our 3D micro-ring-electrode arrays for single impact recordings from silver nanoparticles.

Graphical abstract: Inkjet-printed 3D micro-ring-electrode arrays for amperometric nanoparticle detection

Supplementary files

Article information

Article type
Paper
Submitted
11 Oct 2022
Accepted
25 Jan 2023
First published
31 Jan 2023

Nanoscale, 2023,15, 4006-4013

Inkjet-printed 3D micro-ring-electrode arrays for amperometric nanoparticle detection

H. Peng, L. Grob, L. J. K. Weiß, L. Hiendlmeier, E. Music, I. Kopic, T. F. Teshima, P. Rinklin and B. Wolfrum, Nanoscale, 2023, 15, 4006 DOI: 10.1039/D2NR05640B

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