Experimental study of ultrasound-triggered vaporization of microdroplets on a wall

Kwon, Seho; Son, Gihun

doi:10.1007/s12206-022-0222-7

Cited by 5 publications

(1 citation statement)

References 21 publications

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“…The vial was placed in a vacuum chamber for 12 h to completely remove the chloroform. Subsequently, a thin white lipid film formed at the bottom of the vial was hydrated with 1.8 mL of distilled water and sonicated using a bath sonicator (Powersonic 505, Hwashin Instrument, Seoul, Republic of Korea) at 56 • C. After allowing the vial to rest with the lipid solution at room temperature, liquid DDFP was added to the vial to achieve a volume fraction of 10% [16]. Finally, DDFP droplets were created by agitating the vials for 45 s in a Vialmix (Lantheus Holdings, Billerica, MA, USA).…”

Section: Methodsmentioning

confidence: 99%

Repeatable Acoustic Vaporization of Coated Perfluorocarbon Bubbles for Micro-Actuation Inspired by Polypodium aureum

Jeong,

Seo,

Seo

et al. 2024

Biomimetics

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Polypodium aureum, a fern, possesses a specialized spore-releasing mechanism like a catapult induced by the quick expansion of vaporized bubbles. This study introduces lipid-coated perfluorocarbon droplets to enable repeatable vaporization–condensation cycles, inspired by the repeatable vaporization of Polypodium aureum. Lipid-perfluorocarbon droplets have been considered not to exhibit repeatable oscillations due to bubble collapse of the low surface tension of lipid layers. However, a single lipid-dodecafluoropentane droplet with a diameter of 9.17 µm shows expansion–contraction oscillations over 4000 cycles by changing lipid composition and applying a low-power 1.7 MHz ultrasound to induce the partial vaporization of the droplets. The optimal combinations of shell composition, droplet fabrication, and acoustic conditions can minimize the damage on shell structure and promote a quick recovery of damaged shell layers. The highly expanding oscillatory microbubbles provide a new direction for fuel-free micro- or nanobots, as well as biomedical applications of contrast agents and drug delivery.

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Section: Methodsmentioning

confidence: 99%