AFM characterization of nanobubble formation and slip condition in oxygenated and electrokinetically altered fluids

作者：Bhushan Bharat^*; Pan Yunlu; Daniels Stephanie

来源：Journal of Colloid and Interface Science, 2013, 392: 105-116.

DOI：10.1016/j.jcis.2012.09.077

• Nanobubbles
• Atomic force microscopy
• Oxygenated bubbles
• Electrokinetically altered bubbles
• Taylor-Couette-Poiseuille flow
• Slip length

Nanobubbles are gas-filled features that spontaneously form at the interface of hydrophobic surfaces and aqueous solutions. In this study, an atomic force microscope (AFM) was used to characterize the morphology of nanobubbles formed on hydrophobic polystyrene (PS) and octadecyltrichlorosilane (OTS) films immersed in DI water, saline, saline with oxygen and an electrokinetically altered saline solution produced with Taylor-Couette-Poiseuille flow under elevated oxygen pressure. AFM force spectroscopy was used to evaluate hydrodynamic and electrostatic forces and boundary slip condition in various fluids. The effect of solution, electric field and surface charge on shape, size and density of nanobubbles as well as slip length was quantified and the results and underlying mechanisms are presented in this paper.

• 出版日期2013-2-15
• 单位哈尔滨工业大学