Bridging interactions and selective nanoparticle aggregation mediated by monovalent cations

Dawei Wang, Baudilio Tejerina, I. Lagzi, Bartlomiej Kowalczyk, Bartosz A. Grzybowski

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Selective aggregation and precipitation of like-charged nanoparticles (NPs) covered with carboxylate ligands can be induced by different monovalent cations. The ordering of critical concentrations required for NP precipitation is Cs+≫K+>Li+>Na+> Rb+ and does not correlate with the size of hydrated cations M +, nor can it be predicted by the Hofmeister series. On the other hand, different anions have no effect on the precipitation trends. These observations are rationalized by a theoretical model combining the elements of the DLVO theory with molecular-level calculations. The key component of the model is the cation-specific binding of various metal cations to the carboxylate ligands.

Original languageEnglish
Pages (from-to)530-536
Number of pages7
JournalACS Nano
Volume5
Issue number1
DOIs
Publication statusPublished - Jan 25 2011

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Monovalent Cations
Cations
Agglomeration
Positive ions
Nanoparticles
cations
nanoparticles
carboxylates
Ligands
interactions
ligands
Anions
Metals
Negative ions
anions
trends
metals

Keywords

  • Bridging interaction
  • Modeling
  • Nanoparticles
  • Precipitation
  • Selective aggregation

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Bridging interactions and selective nanoparticle aggregation mediated by monovalent cations. / Wang, Dawei; Tejerina, Baudilio; Lagzi, I.; Kowalczyk, Bartlomiej; Grzybowski, Bartosz A.

In: ACS Nano, Vol. 5, No. 1, 25.01.2011, p. 530-536.

Research output: Contribution to journalArticle

Wang, Dawei ; Tejerina, Baudilio ; Lagzi, I. ; Kowalczyk, Bartlomiej ; Grzybowski, Bartosz A. / Bridging interactions and selective nanoparticle aggregation mediated by monovalent cations. In: ACS Nano. 2011 ; Vol. 5, No. 1. pp. 530-536.
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