How Nanobubbles Lose Stability: Effects of Surfactants (image) American Institute of Physics Share Print E-Mail Caption (a) From top to bottom, the model for solvent, soluble surfactant and insoluble surfactant, respectively. For the surfactant molecules, small orange beads represent surfactant tail (non-polar, hydrophobic region) and the larger green beads represent surfactant head (polar, hydrophilic region). (b) The final configuration for a stable nanobubble is shown here with gray sections representing liquid molecules, the blue area representing top substrate and the tan area representing the bottom substrate. Credit Qianxiang Xiao, Yawei Liu, Zhenjiang Guo, Zhiping Liu, and Xianren Zhang Usage Restrictions This image may be used only with appropriate credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.