Supersonic laser-induced jetting of aluminum micro-droplets
- 4 May 2015
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 106 (18), 181905
- https://doi.org/10.1063/1.4921009
Abstract
The droplet velocity and the incubation time of pure aluminum micro-droplets, printed using the method of sub-nanosecond laser induced forward transfer, have been measured indicating the formation of supersonic laser-induced jetting. The incubation time and the droplet velocity were extracted by measuring a transient electrical signal associated with droplet landing on the surface of the acceptor substrate. This technique has been exploited for studying small volume droplets, in the range of 10–100 femto-litters for which supersonic velocities were measured. The results suggest elastic propagation of the droplets across the donor-to-acceptor gap, a nonlinear deposition dynamics on the surface of the acceptor and overall efficient energy transfer from the laser beam to the droplets.Keywords
Funding Information
- Seventh Framework Programme (314362)
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