Thermally induced mass transfer between nanobubbles and micropancakes
Thermally induced mass transfer between nanobubbles and micropancakes
复制标题
DOI：
10.1016/j.ijheatmasstransfer.2021.122001
复制
发表时间：
2021-12
影响因子：
5.2
通讯作者：
R. Kimura;H. Teshima;Qinyi Li;Koji Takahashi
中科院分区：
文献类型：
--
作者：
R. Kimura;H. Teshima;Qinyi Li;Koji Takahashi
固液界面纳米气相对温度变化的响应尚不清楚。我们研究了加热时表面纳米气泡和底层微煎饼之间的相互作用。通过对同一区域加热前后的原子力显微镜成像，我们发现表面纳米气泡在加热后表现出不同的行为：成核、生长和消失。行为上的差异是由于下伏气相的存在，如微薄层和吸附层。纳米气泡的成核位置取决于微煎饼的位置。下面的微煎饼的大小是微煎饼和上面的纳米气泡之间气体传输方式的核心。我们提出，强吸附的气体层吸引溶解的气体分子，从而导致加热前后的不可逆生长。
The response of nanoscopic gas phases at solid-liquid interfaces to temperature changes remains unclear. We investigated the interactions between surface nanobubbles and underlying micropancakes upon heating. By atomic force microscopy imaging of the same area before and after heating, we found that the surface nanobubbles exhibited various behaviors upon heating: nucleation, growth, and disappearance. The differences in behavior are attributable to the existence of underlying gas phases, such as micropancakes and adsorbed layers. The nucleation sites of the nanobubbles depend on the positions of the micropancakes. The size of the underlying micropancakes is central to the manner of gas transport between the micropancakes and overlying nanobubbles. We propose that the strongly adsorbed gas layers attract dissolved gas molecules and thereby lead to irreversible growth before and after heating.