Passage of fragmentation products through the vapor–liquid interface

Determine whether laser-induced fragmentation products of gold nanoparticles can overcome the vapor–liquid interfacial barrier and escape the laser-generated bubble, rather than remaining confined or pinned inside it, in order to clarify the stabilization of small clusters versus their ripening through close-proximity interactions.

Background

The paper presents a reaction map for the laser-induced heating, melting, bubble formation, and fragmentation of gold nanoparticles suspended in water. During fragmentation, surface material and smaller clusters may be generated inside or near the vapor bubble formed around the heated nanoparticle. The authors note that the subsequent fate of these products is important because confinement within the bubble could increase collision rates and promote ripening, whereas escape across the vapor–liquid interface could support the stabilization of ultrasmall clusters.

The authors explicitly identify as unresolved whether the fragmentation products can cross the vapor–liquid interface or remain trapped inside the bubble. Resolving this question would help explain the observed final cluster sizes and the relationship between bubble dynamics, cluster stabilization, and particle ripening.

References

Additionally, the question of whether fragmentation products can overcome the barrier at the vapor liquid interface or be pinned inside the bubble bears quite some importance for the stabilization of small clusters as opposed to ripening by close proximity.

— Laser fragmentation in liquid - constructing a generic reaction map  (2610.11494 - Plech et al., 8 Oct 2026) in Section “Interplay of photoreactions”