Open access
Date
2024Type
- Journal Article
ETH Bibliography
yes
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Abstract
Additive manufacturing (AM) will empower the next breakthroughs in nanotechnology by combining unmatched geometrical freedom with nanometric resolution. Despite recent advances, no micro-AM technique has been able to synthesize functional nanostructures with excellent metal quality and sub-100 nm resolution. Here, significant breakthroughs in electrohydrodynamic redox 3D printing (EHD-RP) are reported by directly fabricating high-purity Cu (>98 at.%) with adjustable voxel size from >6 mu m down to 50 nm. This unique tunability of the feature size is achieved by managing in-flight solvent evaporation of the ion-loaded droplet to either trigger or prevent the Coulomb explosion. In the first case, the landing of confined droplets on the substrate allows the fabrication of high-aspect-ratio 50 nm-wide nanopillars, while in the second, droplet disintegration leads to large-area spray deposition. It is discussed that the reported pillar width corresponds to the ultimate resolution achievable by EHD printing. The unrivaled feature size and growth rate (>100 voxel s(-1)) enable the direct manufacturing of 30 mu m-tall atom probe tomography (APT) tips that unveil the pristine microstructure and chemistry of the deposit. This method opens up prospects for the development of novel materials for 3D nano-printing. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000688270Publication status
publishedExternal links
Journal / series
SmallPages / Article No.
Publisher
Wiley-VCHSubject
atom probe tomography; Coulomb explosion; electrodynamic redox 3D printing; nano 3D printingOrganisational unit
03692 - Spolenak, Ralph / Spolenak, Ralph
03692 - Spolenak, Ralph / Spolenak, Ralph
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ETH Bibliography
yes
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