论文标题
多个表面纳米泡和纳米光的扩散相互作用：收缩，生长和变形
Diffusive interaction of multiple surface nanobubbles and nanodroplets: shrinkage, growth, and coarsening
论文作者
论文摘要
表面纳米泡是纳米镜球形盖形的气体域，即使持续几天，也是稳定的稳定底物上的。在理论上解释了{\ it单}表面纳米泡的稳定性之后，即需要固定和气体过度饱和的接触线固定和气体过度饱和，以使其与扩散的溶解[Lohse and phys。纳米泡。为此，我们使用适当的边界条件以及用于表示生长或收缩气泡的沉浸式边界方法的扩散方程开发有限的差异方案。验证该方案后，针对Epstein和Plesset的确切结果，用于散装气泡[J.化学物理。 18，1505（1950）]和lohse和Zhang的表面气泡，这些模拟的框架用于描述竞争性生长的纳米泡的粗化过程。这种扩散相互作用的纳米泡的粗化过程随着时间的推移而变慢，从而增加了气泡距离。当前的表面纳米泡的结果也适用于浸泡的表面纳米圆形，为此，存在更好控制的调整过程的实验结果。
Surface nanobubbles are nanoscopic spherical-cap shaped gaseous domains on immersed substrates which are stable, even for days. After the stability of a {\it single} surface nanobubble has been theoretically explained, i.e. contact line pinning and gas oversaturation are required to stabilize them against diffusive dissolution [Lohse and Zhang, Phys.\ Rev.\ E 91, 031003 (R) (2015)], here we focus on the {\it collective} diffusive interaction of {\it multiple} nanobubbles. For that purpose we develop a finite difference scheme for the diffusion equation with the appropriate boundary conditions and with the immersed boundary method used to represent the growing or shrinking bubbles. After validation of the scheme against the exact results of Epstein and Plesset for a bulk bubble [J. Chem. Phys. 18, 1505 (1950)] and of Lohse and Zhang for a surface bubble, the framework of these simulations is used to describe the coarsening process of competitively growing nanobubbles. The coarsening process for such diffusively interacting nanobubbles slows down with advancing time and thus increasing bubble distance. The present results for surface nanobubbles are also applicable for immersed surface nanodroplets, for which better controlled experimental results of the coarsening process exist.
