Ionic-like behavior of oppositely charged nanoparticles.
Mixtures of oppositely charged nanoparticles of various sizes and charge ratios precipitate only at the point of electroneutrality. This phenomenon-specific to the nanoscale and reminiscent of threshold precipitation of ions-is a consequence of the formation of core-and-shell nanoparticle aggregates, in which the shells are composed of like-charged particles and are stabilized by efficient electrostatic screening.
Kalsin
Alexander M
AM
Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Kowalczyk
Bartlomiej
B
Smoukov
Stoyan K
SK
Klajn
Rafal
R
Grzybowski
Bartosz A
BA