title: Ionic-like behavior of oppositely charged nanoparticles.
abstract: 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.
authors.affiliation: Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: Alexander M
authors.initials: AM
authors.lastname: Kalsin
authors.forename: Bartlomiej
authors.initials: B
authors.lastname: Kowalczyk
authors.forename: Stoyan K
authors.initials: SK
authors.lastname: Smoukov
authors.forename: Rafal
authors.initials: R
authors.lastname: Klajn
authors.forename: Bartosz A
authors.initials: BA
authors.lastname: Grzybowski