Acoustic Cavitation at the Water−Glass Interface

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• 作者：Matthieu Virot ; Tony Chave ; Sergey I. Nikitenko ; Dmitry G. Shchukin ; Thomas Zemb ; Helmuth Mhwald
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：August 5, 2010
• 年：2010
• 卷：114
• 期：30
• 页码：13083-13091
• 全文大小：447K
• 年卷期：v.114,no.30(August 5, 2010)
• ISSN：1932-7455

文摘

Power ultrasound (20 kHz, I_ac = 20−56 W cm⁻²) was used to investigate physical and chemical effects of acoustic cavitation at the water−glass interface. Physical effects were characterized with different techniques of microscopy (optical, SEM, AFM) and were shown to increase and evolve as a function of sonication duration according to two distinctive periods: (i) an incubation period that initiates weak points on a glass surface, which may be the result of acoustically created shock-waves, and (ii) a second period of erosion, which is related to direct impact fracture erosion of the material. Chemical analysis of water (ICP-OES), after ultrasonic treatment, clearly indicates that bubble collapse at the water−glass interface initiates not only mechanical erosion but also accelerates the leaching processes of the glass components.