Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Langmuir. 2010 Feb 16;26(4):2227-30. doi: 10.1021/la904425v.
We introduce a microfluidic approach to generating monodisperse, stable nanoparticle-shelled bubbles using air-in-oil-in-water (A/O/W) compound bubbles as templates. The oil phase of the A/O/W compound bubbles comprises a volatile organic solvent and a hydrophobic silica nanoparticle. Upon evaporation of the organic solvent, the nanoparticles in the oil layer form a stiff shell at the air-water interface, which drastically enhances the stability of the bubbles against dissolution and coarsening. On the basis of this approach, we demonstrate that it is also possible to generate functional bubbles stabilized by composite shells that are composed of mixtures of hydrophobic materials and nanoparticles with unique properties.
我们介绍了一种使用油包水（A/O/W）复合气泡作为模板来制备单分散、稳定的核壳纳米气泡的微流控方法。A/O/W 复合气泡的油相由挥发性有机溶剂和疏水性二氧化硅纳米颗粒组成。当有机溶剂蒸发时，油层中的纳米颗粒在气-水界面形成刚性壳，极大地增强了气泡对溶解和粗化的稳定性。在此基础上，我们证明了也有可能制备由疏水性材料和具有独特性能的纳米颗粒的混合物组成的复合壳稳定的功能性气泡。
