Shadowgraphic investigations into the laser-induced forward transfer of different SnO2 precursor films

Laser-induced forward transfer of different SnO2 precursor films for sensor applications were investigated using time resolved imaging, from 0 to 2 mu s after the onset of the ablation process. Transfers of SnCl2(acac)(2) and SnO2 nano-particles, both with and without a triazene polymer dynamic release layer (DRL), were investigated and compared to transfers of aluminum films with a triazene polymer DRL. Shockwave speed and flyer speeds at high laser fluences Phi = 650 mJ/cm(2) and at the lower fluences, suitable for the transfer of functional and well defined pixels were analyzed. No influence of the use of a triazene polymer DRL on shockwave and flyer speed was observed. Material ejected under transfer condition showed a velocity of around 200 m/s with a weak shockwave. (C) 2012 Elsevier B. V. All rights reserved.