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Ultrafast vapourization dynamics of laser-activated polymeric microcapsules

Author

Listed:
  • Guillaume Lajoinie

    (Physics of Fluids Group, MESA+ Institute for Nanotechnology and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands)

  • Erik Gelderblom

    (Physics of Fluids Group, MESA+ Institute for Nanotechnology and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands)

  • Ceciel Chlon

    (Philips Research Laboratories Europe, High Tech Campus 11, 5656 AE Eindhoven, The Netherlands)

  • Marcel Böhmer

    (Philips Research Laboratories Europe, High Tech Campus 11, 5656 AE Eindhoven, The Netherlands)

  • Wiendelt Steenbergen

    (Biomedical Photonic Imaging Group, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands)

  • Nico de Jong

    (Biomedical Engineering, Thoraxcenter, Erasmus MC, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands)

  • Srirang Manohar

    (Biomedical Photonic Imaging Group, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands)

  • Michel Versluis

    (Physics of Fluids Group, MESA+ Institute for Nanotechnology and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands)

Abstract

Precision control of vapourization, both in space and time, has many potential applications; however, the physical mechanisms underlying controlled boiling are not well understood. The reason is the combined microscopic length scales and ultrashort timescales associated with the initiation and subsequent dynamical behaviour of the vapour bubbles formed. Here we study the nanoseconds vapour bubble dynamics of laser-heated single oil-filled microcapsules using coupled optical and acoustic detection. Pulsed laser excitation leads to vapour formation and collapse, and a simple physical model captures the observed radial dynamics and resulting acoustic pressures. Continuous wave laser excitation leads to a sequence of vapourization/condensation cycles, the result of absorbing microcapsule fragments moving in and out of the laser beam. A model incorporating thermal diffusion from the capsule shell into the oil core and surrounding water reveals the mechanisms behind the onset of vapourization. Excellent agreement is observed between the modelled dynamics and experiment.

Suggested Citation

  • Guillaume Lajoinie & Erik Gelderblom & Ceciel Chlon & Marcel Böhmer & Wiendelt Steenbergen & Nico de Jong & Srirang Manohar & Michel Versluis, 2014. "Ultrafast vapourization dynamics of laser-activated polymeric microcapsules," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4671
    DOI: 10.1038/ncomms4671
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