Bubble nucleation on hydrophobic islands provides evidence to anomalously high contact angles of nanobubbles

被引：73

作者：

Nam, Youngsuk ^{[1
]}

Jua, Y. Sungtaek ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2981572

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We observe stable steady-periodic vapor bubble nucleation on islands of nanoscopically smooth hydrophobic materials microfabricated on a silicon substrate. The minimum surface superheat required for the onset of bubble nucleation is very low (similar to 9 degrees C), which cannot be explained by the established models of heterogeneous bubble nucleation. A modified bubble nucleation model indicates that the observed minimum superheat can be explained when one assumes the existence of a nanoscale interfacial gas phase with anomalously high contact angles (>160 degrees). Our data therefore provide independent evidence that supports previous atomic force microscopy and infrared spectroscopy studies of the topography of nanobubbles. (c) 2008 American Institute of Physics.

引用

页数：3

共 18 条

[1] Controlling the location and spatial extent of nanobubbles using hydrophobically nanopatterned surfaces [J].