成核
化学物理
表面粗糙度
分子动力学
半径
表面光洁度
形态学(生物学)
材料科学
纳米技术
化学
结晶学
复合材料
计算化学
地质学
古生物学
有机化学
计算机科学
计算机安全
作者
Shantanu Maheshwari,C. P. J. W. van Kruijsdijk,Sankar P. Sanyal,Albert D. Harvey
出处
期刊:Langmuir
[American Chemical Society]
日期:2020-04-02
卷期号:36 (15): 4108-4115
被引量:23
标识
DOI:10.1021/acs.langmuir.0c00635
摘要
We study the nucleation and growth of a nanobubble on rough surfaces using molecular dynamics simulations. A nanobubble nucleates and grows by virtue of a heterogeneous surface reaction which results in the production of gas molecules near the surface. We study the role of surface roughness in the nucleation and growth behavior of a nanobubble. We perform simulations at various reaction rates and surface morphology and quantified the growth dynamics of a nanobubble. Our simulations show that after the onset of nucleation, the nanobubble grows rapidly with radius following t1/3 behavior followed by a diffusive growth regime which is marked by t1/2 growth behavior. This growth behavior remains independent of surface roughness and reaction rates over the range considered in this study. We also quantified the oversaturation of gas required for nucleation of a nanobubble and demonstrated its dependence on the surface morphology.
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