Self-Assembly of Charged Nanoparticles by an Autocatalytic Reaction Front

Bíborka Bohner, Gábor Schuszter, Hideyuki Nakanishi, Dániel Zámbó, A. Deák, D. Horváth, A. Tóth, I. Lagzi

Research output: Contribution to journalArticle

4 Citations (Scopus)

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 upward and downward. 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.

Original languageEnglish
Pages (from-to)12019-12024
Number of pages6
JournalLangmuir
Volume31
Issue number44
DOIs
Publication statusPublished - Nov 10 2015

Fingerprint

Self assembly
self assembly
Agglomeration
Nanoparticles
Coulomb interactions
nanoparticles
Protonation
Sedimentation
Ligands
electrostatics
Liquids
carboxylates
liquid phases
interactions
ligands
chlorite

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Self-Assembly of Charged Nanoparticles by an Autocatalytic Reaction Front. / Bohner, Bíborka; Schuszter, Gábor; Nakanishi, Hideyuki; Zámbó, Dániel; Deák, A.; Horváth, D.; Tóth, A.; Lagzi, I.

In: Langmuir, Vol. 31, No. 44, 10.11.2015, p. 12019-12024.

Research output: Contribution to journalArticle

Bohner, Bíborka ; Schuszter, Gábor ; Nakanishi, Hideyuki ; Zámbó, Dániel ; Deák, A. ; Horváth, D. ; Tóth, A. ; Lagzi, I. / Self-Assembly of Charged Nanoparticles by an Autocatalytic Reaction Front. In: Langmuir. 2015 ; Vol. 31, No. 44. pp. 12019-12024.
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