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Generation of Superstable, Monodisperse Microbubbles Using a pH‐Driven Assembly of Surface‐Active Particles
Author(s) -
Drenckhan Wiebke
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200901531
Subject(s) - microscale chemistry , dispersity , dispersion (optics) , dissolution , bubble , microfluidics , microbubbles , materials science , chemical engineering , nanotechnology , particle (ecology) , surface (topology) , chemical physics , chemistry , optics , mechanics , polymer chemistry , physics , acoustics , mathematics education , mathematics , geology , engineering , ultrasound , geometry , oceanography
Abstract Bubbling to the surface : Microscale gas bubbles can be generated in a microfluidic device by simultaneously injecting CO 2 and a dispersion of particles whose hydrophobicity increases as the pH value decreases. The CO 2 dissolves rapidly out of the bubbles, which shrink, and render the dispersion increasingly acidic. This drives the particles to the bubble surface where they form a type of “armor” against further dissolution (see picture).