Inkjet-printed 3D micro-ring-electrode arrays for amperometric nanoparticle detection.
Hu PengLeroy GrobLennart Jakob Konstantin WeißLukas HiendlmeierEmir MusicInola KopicTetsuhiko F TeshimaPhilipp RinklinBernhard WolfrumPublished in: Nanoscale (2023)
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.
Keyphrases
- high throughput
- silver nanoparticles
- loop mediated isothermal amplification
- high density
- label free
- real time pcr
- circulating tumor cells
- deep brain stimulation
- carbon nanotubes
- high speed
- high resolution
- low cost
- solid state
- high frequency
- radiofrequency ablation
- gold nanoparticles
- hydrogen peroxide
- sensitive detection
- catheter ablation
- atrial fibrillation
- reduced graphene oxide
- quantum dots