Effect of Pressurization on the Dynamics of a Cavitation Bubble Induced by Liquid-Phase Laser Ablation

Sasaki, Koichi; Nakano, T.; Soliman, Wafaa; Takada, Noriharu

doi:10.1143/apex.2.046501

Cited by 117 publications

(115 citation statements)

References 16 publications

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“…The results from this experiment were similar to those shown by Sasaki et al [9] , who induced a cavitation bubble in a fluid at different pressures, but using a higher pressure than in the present experiments. In both studies from Sasaki et al [9] and our research group, the external pressure applied on the liquid affects the bubbles collapse time, consequently according to the Rayleigh-Plesset relation, the maximum bubble radii were also affected.…”

Section: Collapse Time and External Liquid Pressuresupporting

confidence: 92%

See 1 more Smart Citation

Laser-induced cavitation phenomenon studied using three different optically-based approaches – An initial overview of results

Devia-Cruz

Camacho‐López

Evans

et al. 2012

Photonics &Amp; Lasers in Medicine

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This report presents a study of shock wave and cavitation bubble dynamics induced by nanosecond laser pulses in pressurized water. Three methods were used to obtain data from the irradiated sample: (1) pump-probe laser flash shadowgraphy, (2) pressure wave sensing by means of a fiber optic interferometer hydrophone, and (3) a novel technique based on the modulation of spatial transmittance by the cavitation bubble. The medium used in these experiments was distilled water in a chamber under different pressure conditions which included values found in human intraocular liquid. It could be shown that while external pressure does not affect either the shock wave propagation or the initial bubble growth rate, it does affect the first collapse time of the bubble and its maximum diameter.Keywords: bubble; shock wave; microsurgery; pressure; intraocular.Zusammenfassung : Die vorliegende Arbeit untersucht die Dynamik von Schockwellen und Kavitationsblasen, die mittels Nanosekunden-Laserpulsen in unter Druck gesetztem Wasser erzeugt wurden. Dabei wurden drei unterschiedliche Methoden verwendet: (1) Laserflash-Verfahren, (2) Druckwellenmessung mittels faseroptischem Interferometer und (3) eine neuartige Technik basierend auf der Modulation der r ä umlichen Transmission durch die Kavitationsblase. Die Untersuchungen wurden an destilliertem Wasser unter unterschiedlichen Dr ü cken -u.a. auch physiologische Werte, wie sie intraokular vorkommen -vorgenommen, die mittels einer speziellen Druckkammer erzeugt wurden. Es konnte gezeigt werden, dass weder die Ausbreitung der Schockwelle noch das anf ä ngliche Blasenwachstum durch den ä u ß eren Druck beeinflusst wird, die Kollapszeit der Blase und ihr maximaler Durchmesser jedoch sehr wohl.Schl ü sselw ö rter: Blase; Schockwelle; Mikrochirurgie; Druck; intraokular.

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Section: Collapse Time and External Liquid Pressuresupporting

confidence: 92%

“…This bouncing behavior remains for several subsequent bubbles [4,8] . Some authors also have studied the phenomenon of induced cavitation in pressurized fluid [9] using shadowgraphy.…”

Section: Introductionmentioning

confidence: 99%

Laser-induced cavitation phenomenon studied using three different optically-based approaches – An initial overview of results

Devia-Cruz

Camacho‐López

Evans

et al. 2012

Photonics &Amp; Lasers in Medicine

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“…An increasing repetition rate signifies a reduction of the temporal interpulse distance, which could cause an overlap of subsequent pulses and cavitation bubble lifetimes. Sasaki et al reported the lifetime of the cavitation bubble for nanosecond laser pulses at ambient pressure to be 15-200 μs [43], and for picosecond laser pulses Wagener et al determined a threshold of 5 kHz (equivalent to 200 μs interpulse distance) [40]. A further increase of the repetition rate creates a shielding effect by the cavitation bubble of the previous pulse which affects ablation efficiency.…”

Section: Laser-based Synthesismentioning

confidence: 99%

Water-based, surfactant-free cytocompatible nanoparticle-microgel-composite biomaterials – rational design by laser synthesis, processing into fiber pads and impact on cell proliferation

et al. 2017

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Abstract:This work highlights the laser-based aqueous synthesis and processing of nanocomposites, composed of zinc or iron nanoparticles embedded in a N-Vinylcaprolactam microgel matrix, with potential applicability as ion releasing fiber pads for wound healing. An in situ laser process for microgel synthesis is developed and optimized for high embedded nanoparticle yields, evaluating influences of laser repetition rate and monomer concentration. The impact of the nanoparticles on polymerization was increased by embedded zinc oxide nanoparticles, and reduced in the presence of iron oxide. Furthermore, TEM images verified that the nanoparticles were homogeneously embedded into the polymer matrix. The nanoparticle-loaded microgels were thermally stable up to 429°C, which ensures that the composites maintain their integrity after heat sterilization and during rapid prototyping by thermal polymer processing. The general suitability of the hydrogels as active biomaterial for wound healing was assessed in toxicity, cell proliferation and migration assays using human dermal fibroblasts and keratinocytes, where cytocompatibility was verified, while the proliferation was affected by the gel alone as well as the embedded nanoparticles. The hydrogels were processed to suit their use as a biomaterial for wound coverages via electrospinning resulting in a centimeter scale fully cytocompatible fiber pad with the nanoparticle-filled microgel capsules supported on the fiber's surface.

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“…The cavitation bubble is a remarkable phenomenon of liquid-phase laser ablation, and is induced as a result of the abrupt formation of a laser-produced plasma in the liquid [33][34][35]. The cavitation bubble has the dynamics of expansion, shrinkage, and collapse.…”

Section: Introductionmentioning

confidence: 99%

Discharge phenomena in a cavitation bubble induced by liquid-phase laser ablation

Sasaki¹,

Takahashi²

2017

J. Phys. D: Appl. Phys.

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Abstract.We observed the discharge phenomena in a cavitation bubble induced by liquid-phase laser ablation. A remarkable result was the deformation of the cavitation bubble. The formation of a swelling was observed from the cavitation bubble when the gas-liquid boundary reached a close distance from a needle electrode. The growth direction of the swelling was perpendicular to the gas-liquid boundary. The discharge toward the center of the target occurred when the swelling connected the electrode and the cavitation bubble. These experimental results suggest the perpendicular electric field to the gas-liquid boundary of the cavitation bubble. In other words, the cavitation bubble induced by liquid-phase laser ablation is conductive and it has free charges.

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Effect of Pressurization on the Dynamics of a Cavitation Bubble Induced by Liquid-Phase Laser Ablation

Cited by 117 publications

References 16 publications

Laser-induced cavitation phenomenon studied using three different optically-based approaches – An initial overview of results

Laser-induced cavitation phenomenon studied using three different optically-based approaches – An initial overview of results

Water-based, surfactant-free cytocompatible nanoparticle-microgel-composite biomaterials – rational design by laser synthesis, processing into fiber pads and impact on cell proliferation

Discharge phenomena in a cavitation bubble induced by liquid-phase laser ablation

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