Droplet printing through bubble contact in the laser forward transfer of liquids

作者：Duocastella M; Fernandez Pradas J M^*; Morenza J L; Serra P

来源：Applied Surface Science, 2011, 257(7): 2825-2829.

DOI：10.1016/j.apsusc.2010.10.070

• Laser direct-writing
• Time-resolved imaging
• Laser printing
• Micropatterning

The deposition process of the laser-induced forward transfer of liquids at high laser fluences is analyzed through time-resolved imaging. It has been found that, at these conditions, sessile droplets are deposited due to the contact of a generated cavitation bubble with the receptor substrate, in contrast to the jet contact mechanism observed at low and moderate laser fluences. The bubble contact results in droplets with a larger diameter, a smaller contact angle and a lower uniformity than those of the jet mechanism. Therefore, in order to attain a high degree of resolution this mechanism should be prevented.

• 出版日期2011-1-15