Pulsed laser ablation in liquids: Impact of the bubble dynamics on particle formation

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• 作者：Stefan Reich^a ; Patrick Sch&ouml ; nfeld^a ; Philipp Wagener^b ; Alexander Letzel^b ; Shyjumon Ibrahimkutty^c ; Bilal G&ouml ; kce^b ; Stephan Barcikowski^b ; Andreas Menzel^d ; Tomy dos Santos Rolo^a ; Anton Plech^a ; ^{anton.plech@kit.edu}
• 关键词：Pulsed laser ablation in liquids ; Time-resolved small angle scattering ; Fast X-ray radiography ; Stroboscopy ; Hydrodynamics
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：489
• 期：Complete
• 页码：106-113
• 全文大小：2548 K
• 卷排序：489

文摘

Pulsed laser ablation in liquids (PLAL) is a multiscale process, involving multiple mutually interacting phenomena. In order to synthesize nanoparticles with well-defined properties it is important to understand the dynamics of the underlying structure evolution. We use visible-light stroboscopic imaging and X-ray radiography to investigate the dynamics occurring during PLAL of silver and gold on a macroscopic scale, whilst X-ray small angle scattering is utilized to deepen the understanding on particle genesis. By comparing our results with earlier reports we can elucidate the role of the cavitation bubble. We find that symmetry breaking at the liquid-solid interface is a critical factor for bubble motion and that the bubble motion acts on the particle distribution as confinement and retraction force to create secondary agglomerates.