Work

Layering of bidisperse charged nanoparticles in sedimentation

Year: 2020

Type: article

Abstract: Bidisperse mixtures of charged nanoparticles form separate layers upon centrifugation as a result of minimization of the system's free energy in sedimentation-diffusion equilibrium. Different factors were investigated experimentally for their effects on the layering, and are supported by theoretical calculations of the full sedimentation profiles. Surprisingly, lighter/smaller nanoparticles can even sink below heavier/larger ones when the particle surface charge is carefully tuned. This study provides deeper insights into the control of layering in polydisperse particle mixtures during sedimentation.

Source: Soft Matter

DOI: 10.1039/d0sm00588f

Authors: Xufeng Xu, P. M. Biesheuvel, Helmut Cölfen, Evan Spruijt

Institutions: Laboratory of Physical Chemistry, Eindhoven University of Technology, Wetsus, European Centre of Excellence for Sustainable Water Technology, University of Konstanz, Radboud University Nijmegen

Language: English

Topic: Electrostatics and Colloid Interactions

Subfield: Physical and Theoretical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Funders: Horizon 2020 Framework Programme, H2020 Marie Skłodowska-Curie Actions