论文标题
等离子气泡成核和水的生长：溶解空气的影响
Plasmonic Bubble Nucleation and Growth in Water: Effect of Dissolved Air
论文作者
论文摘要
在连续的激光照射下，浸入水中的高贵金属纳米颗粒可以迅速加热，从而导致所谓的等离子气泡的成核。在这项工作中，我们希望进一步了解气泡成核和生长机制。特别是，我们定量研究了溶解空气量对气泡成核和生长动力学的影响，均针对初始巨型气泡，该气泡在打开激光后不久形成，主要由蒸气组成，并且在气泡的最后寿命阶段，在此期间，它主要包含从水中排出的空气。我们发现气泡成核温度取决于气体浓度：气体浓度越高，气泡成核温度越低。同样，长期扩散量的气泡生长受气体浓度控制。气泡的半径随着airequilighter的气化和气化水的r（t）〜t^1/3而生长。相比之下，在部分脱气的水中，生长要慢得多，因为即使我们达到的最高温度，水仍然不饱和。
Under continuous laser irradiation, noble metal nanoparticles immersed in water can quickly heat up, leading to the nucleation of so-called plasmonic bubbles. In this work, we want to further understand the bubble nucleation and growth mechanism. In particular, we quantitatively study the effect of the amount of dissolved air on the bubble nucleation and growth dynamics, both for the initial giant bubble, which forms shortly after switching on the laser and is mainly composed of vapor, and for the final life phase of the bubble, during which it mainly contains air expelled from water. We found that the bubble nucleation temperature depends on the gas concentration: the higher the gas concentration, the lower the bubble nucleation temperature. Also, the long-term diffusiondominated bubble growth is governed by the gas concentration. The radius of the bubbles grows as R(t)~t^1/3 for airequilibrated and air-oversaturated water. In contrast, in partially degassed water, the growth is much slower since, even for the highest temperature we achieve, the water remains undersaturated.
