Published in

American Chemical Society, Langmuir, 44(31), p. 12019-12024, 2015

DOI: 10.1021/acs.langmuir.5b03219

Links

Tools

Export citation

Search in Google Scholar

Self-Assembly of Charged Nanoparticles by an Autocatalytic Reaction Front

This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
  • Must obtain written permission from Editor
  • Must not violate ACS ethical Guidelines
Orange circle
Postprint: archiving restricted
  • Must obtain written permission from Editor
  • Must not violate ACS ethical Guidelines
Red circle
Published version: archiving forbidden
Data provided by SHERPA/RoMEO

Abstract

In this work we present that aggregation of charged and pH sensitive nanoparticles can be spatiotemporally controlled by an autonomous way using the chlorite-tetrathionate autocatalytic front, where the front regulates the electrostatic interaction between nanoparticles due to protonation of the capping - carboxylate-terminated - ligand. We found that the aggregation and sedimentation of nanoparticles in liquid phase with the effect of reversible binding of the autocatalyst (H+) play important roles in changing the front stability (mixing length) and the velocity of the front in both cases when the fronts propagate upwards and downwards. Calculation of interparticle interactions (electrostatic and van der Waals) with the measurement of front velocity revealed that the aggregation process occurs fast (within a few seconds) at the front position.