Thermally induced nanobubble filaments and cylindrical shock wave formation in colloidal suspension

Orthaber, Uroš (avtor), Petkovšek, Rok (avtor)

An interesting phenomenon involving generation of nanobubble filaments in an aqueous colloidal suspension of gold nanoparticles (GNP) is being reported on and discussed in the present paper. The heat for thermally induced nanobubbles is being provided to GNPs by a laser pulse. If specific conditions, such as sufficient laser beam fluence, adequate GNP size and concentration are met self-focusing occurs, which consequently leads to a for- mation of one or more nanobubble filaments along the beam propagation direction. The nanobubble filaments are made observable by sending a rarefaction wave through the region, where they occur. Depending on the beam fluence, one or more nanobubble filaments are observed and depending on the beam and GNP parameters, the nanobubble filaments may be accompanied by a plasma filament, if thresholds for self-focusing and ioni- zation are exceeded at the same time. In this case a cylindrical shock wave originating from the filament is observed. The present study investigates the influence of GNP size and beam fluence on nanobubble filament formation. It implements a recently developed technique for nanobubble visualization using a rarefaction wave and a multiple illumination pulse technique for shock wave detection.

• Jezik: Angleški jezik
• Ključne besede: nanobubble, filament, cylindrical shock wave
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 7 str.
• Številčenje: Vol. 171, art. 111623
• PID: 20.500.12556/RUL-175457
• UDK: 544.2
• ISSN pri članku: 1879-2286
• DOI: 10.1016/j.expthermflusci.2025.111623
• COBISS.SI-ID: 254915075
• Datum objave v RUL: 28.10.2025

Gradivo je del revije

• Naslov: Experimental thermal and fluid science
• Skrajšan naslov: Exp. therm. fluid sci.
• Založnik: Elsevier
• ISSN: 1879-2286
• COBISS.SI-ID: 23399685

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: nanomehurček, filament, cilindrični udarni val

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0270
• Naslov: Proizvodni sistemi, laserske tehnologije in spajanje materialov

• Financer: University of Ljubljana
• Naslov: Green Urban Communities of the Future (Phase I: Preparatory Stage)