Promoting ultrasonic cavitation via Negative-Curvature nanoparticles
Abstrak
It is a challenge to study the nucleation of cavitation bubbles, which critically depends on nanoscale morphological features. Our recent advances in synthesizing colloidal negative-curvature nanoparticles (NGC-NPs) offer a rare opportunity, in comparison to the conventional studies of bulk substrates, where it is difficult to obtain consistent and well-defined surface features. In order to quantitatively assess their effects, we exploit the radical-induced color change of [Fe(SCN)6]3−, which turned out to be a more convenient method than the bending of AgNWs and the fluorescence-based methods. We show that the NGC-NPs outperform positive-curvature nanoparticles (PSC-NPs) and homogeneous nucleation, in terms of promoting cavitation. The NGC-NPs provide a higher percentage of gas–solid interface, and thus reduces the activation barrier during the critical stage of bubble nucleation. This leads a higher probability of cavitation and transforms more energy from ultrasonication to radical formation and shockwaves.
Topik & Kata Kunci
Penulis (7)
Zhouling Wu
Xiaobin Liu
Huiying Guo
Jie Huang
Guangyu He
Hongyu Chen
Xueyang Liu
Akses Cepat
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- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1016/j.ultsonch.2024.106924
- Akses
- Open Access ✓