pH mediated kinetics of assembly and disassembly of molecular and nanoscopic building blocks

Eszter Tóth-Szeles, Zsófia Medveczky, Gábor Holló, Judit Horváth, Rózsa Szűcs, Hideyuki Nakanishi, I. Lagzi

Research output: Contribution to journalArticle

Abstract

Self-assembly occurs when building blocks of the system interact with one another through interactions existing between them. Proper temporal control of these interactions can lead to formation of transient self-assembled states. pH mediated self-assembly is one of the powerful tools to stabilize and destabilize structures consisting of different sized building blocks. Here we investigate the kinetics of pH triggered reversible transformation of two building blocks using a relaxation method, reversible vesicle–micelle transformation of oleic acid molecules and dispersion–aggregation of pH sensitive gold nanoparticles. We found significant differences in the characteristic times (two orders of magnitudes) between the disassembly processes—from an ordered structure to a less ordered structure (in the case of oleic acid molecules) or to single building blocks (in the case of nanoparticles)—and the self-assembly processes (bilayer formation or aggregation of nanoparticles). It can be explained by a sophisticated interplay between repulsive (electrostatic) and attractive (van der Waals) interactions.

Original languageEnglish
Pages (from-to)323-333
Number of pages11
JournalReaction Kinetics, Mechanisms and Catalysis
Volume123
Issue number2
DOIs
Publication statusPublished - Apr 1 2018

Fingerprint

Self assembly
Oleic acid
assembly
Oleic Acid
Nanoparticles
self assembly
Kinetics
oleic acid
kinetics
nanoparticles
Molecules
Gold
Electrostatics
interactions
Agglomeration
molecules
electrostatics
gold

Keywords

  • Disassembly
  • Fatty acid
  • Nanoparticles
  • Protonation
  • Self-assembly

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

pH mediated kinetics of assembly and disassembly of molecular and nanoscopic building blocks. / Tóth-Szeles, Eszter; Medveczky, Zsófia; Holló, Gábor; Horváth, Judit; Szűcs, Rózsa; Nakanishi, Hideyuki; Lagzi, I.

In: Reaction Kinetics, Mechanisms and Catalysis, Vol. 123, No. 2, 01.04.2018, p. 323-333.

Research output: Contribution to journalArticle

Tóth-Szeles, Eszter ; Medveczky, Zsófia ; Holló, Gábor ; Horváth, Judit ; Szűcs, Rózsa ; Nakanishi, Hideyuki ; Lagzi, I. / pH mediated kinetics of assembly and disassembly of molecular and nanoscopic building blocks. In: Reaction Kinetics, Mechanisms and Catalysis. 2018 ; Vol. 123, No. 2. pp. 323-333.
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