Time-resolved imaging of the laser forward transfer of liquids
- Departament de Fisica Aplicada i Optica, Universitat de Barcelona, Marti i Franques 1, E-08028 Barcelona (Spain)
Time-resolved imaging is carried out to study the dynamics of the laser-induced forward transfer of an aqueous solution at different laser fluences. The transfer mechanisms are elucidated, and directly correlated with the material deposited at the analyzed irradiation conditions. It is found that there exists a fluence range in which regular and well-defined droplets are deposited. In this case, laser pulse energy absorption results in the formation of a plasma, which expansion originates a cavitation bubble in the liquid. After the further expansion and collapse of the bubble, a long and uniform jet is developed, which advances at a constant velocity until it reaches the receptor substrate. On the other hand, for lower fluences no material is deposited. In this case, although a jet can be also generated, it recoils before reaching the substrate. For higher fluences, splashing is observed on the receptor substrate due to the bursting of the cavitation bubble. Finally, a discussion of the possible mechanisms which lead to such singular dynamics is also provided.
- OSTI ID:
- 21361897
- Journal Information:
- Journal of Applied Physics, Vol. 106, Issue 8; Other Information: DOI: 10.1063/1.3248304; (c) 2009 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AQUEOUS SOLUTIONS
BUBBLES
DROPLETS
ENERGY ABSORPTION
IRRADIATION
LASERS
LIQUIDS
PLASMA
PULSES
RECEPTORS
SUBSTRATES
TIME RESOLUTION
VELOCITY
ABSORPTION
DISPERSIONS
FLUIDS
HOMOGENEOUS MIXTURES
MEMBRANE PROTEINS
MIXTURES
ORGANIC COMPOUNDS
PARTICLES
PROTEINS
RESOLUTION
SOLUTIONS
SORPTION
TIMING PROPERTIES