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Open AccessArticle

Spatial Modes of Laser-Induced Mass Transfer in Micro-Gaps

Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Institute of Organic Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
Max Planck Institute of Colloids and Interfaces, Department of Biomolecular Systems, Am Mühlenberg 1, 14476 Potsdam, Germany
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(7), 1303;
Received: 11 March 2019 / Revised: 21 March 2019 / Accepted: 22 March 2019 / Published: 28 March 2019
(This article belongs to the Special Issue Biofabrication: From Additive Bio-Manufacturing to Bioprinting)
We have observed the concentric deposition patterns of small molecules transferred by means of laser-induced forward transfer (LIFT). The patterns comprised different parts whose presence changed with the experimental constraints in a mode-like fashion. In experiments, we studied this previously unknown phenomenon and derived model assumptions for its emergence. We identified aerosol micro-flow and geometric confinement as the mechanism behind the mass transfer and the cause of the concentric patterns. We validated our model using a simulation. View Full-Text
Keywords: LIFT; bio-printing; aerosol; confinement; deposition patterns LIFT; bio-printing; aerosol; confinement; deposition patterns
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Foertsch, T.C.; Davis, A.T.; Popov, R.; von Bojničić-Kninski, C.; Held, F.E.; Tsogoeva, S.B.; Loeffler, F.F.; Nesterov-Mueller, A. Spatial Modes of Laser-Induced Mass Transfer in Micro-Gaps. Appl. Sci. 2019, 9, 1303.

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