Explosive Formation and Dynamics of Vapor Nanobubbles around a Continuously Heated Gold Nanosphere

Abstract

We form sub-micrometer-sized vapor bubbles around a single laser heating gold nanoparticle in a liquid and monitor them through optical scattering of a probe laser. The fast, inertia-governed expansion is followed by a slower contraction and disappearance after some tens of nanoseconds. In a narrow range of illumination powers, bubble time traces show a clear echo signature. We attribute it to sound waves released upon the initial explosion and reflected by flat interfaces, hundreds of microns away from the particle. Echoes can trigger new explosions. A steady state of nanobubble with a vapor shell surrounding the heated nanoparticle can be reached by a proper time profile of the heating intensity. Stable nanobubbles could have original applications for light modulation and for enhanced optical-acoustic coupling in photoacoustic microscopy.

Cited by in corpus (5)

• Plasmonic Bubble Nucleation and Growth in Water: Effect of Dissolved Air
• Strong and fast rising pressure waves emitted by plasmonic vapor nanobubbles
• Explosive, oscillatory, and Leidenfrost boiling at the nanoscale
• Ultrafast photomechanical transduction through thermophoretic implosion
• Droplet plume emission during plasmonic bubble growth in ternary liquids