Laser-Induced Cavitation for Controlling Crystallization from Solution
Nagaraj Nagalingam (TU Delft - Complex Fluid Processing)
Aswin Raghunathan (Student TU Delft)
V.B. Korede (TU Delft - Complex Fluid Processing)
C. Poelma (TU Delft - Process and Energy)
C.S. Smith (TU Delft - ImPhys/Rieger group, TU Delft - ImPhys/Computational Imaging, TU Delft - Team Carlas Smith, TU Delft - BN/Nynke Dekker Lab)
Remco Hartkamp (TU Delft - Complex Fluid Processing)
Johan T. Padding (TU Delft - Complex Fluid Processing)
H.B. Eral (TU Delft - Complex Fluid Processing)
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Abstract
We demonstrate that a cavitation bubble initiated by a Nd:YAG laser pulse below breakdown threshold induces crystallization from supersaturated aqueous solutions with supersaturation and laser-energy-dependent nucleation kinetics. Combining high-speed video microscopy and simulations, we argue that a competition between the dissipation of absorbed laser energy as latent and sensible heat dictates the solvent evaporation rate and creates a momentary supersaturation peak at the vapor-liquid interface. The number and morphology of crystals correlate to the characteristics of the simulated supersaturation peak.