Gold nanoparticle self-assembly in two-component lipid Langmuir monolayers

Alina Mogilevsky, Raz Jelinek

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Self-assembly processes are considered to be fundamental factors in supramolecular chemistry. Langmuir mono-layers of surfactants or lipids have been shown to constitute effective 2D "templates" for self-assembled nanoparticles and colloids. Here we show that alkyl-coated gold nanoparticles (Au NPs) adopt distinct configurations when incorporated within Langmuir monolayers comprising two lipid components at different mole ratios. Thermodynamic and microscopy analyses reveal that the organization of the Au NP aggregates is governed by both lipid components. In particular, we show that the configurations of the NP assemblies were significantly affected by the extent of molecular interactions between the two lipid components within the monolayer and the monolayer phases formed by each individual lipid. This study demonstrates that multicomponent Langmuir monolayers significantly modulate the self-assembly properties of embedded Au NPs and that parameters such as the monolayer composition, surface pressure, and temperature significantly affect the 2D nanoparticle organization.

Original languageEnglish
Pages (from-to)1260-1268
Number of pages9
JournalLangmuir
Volume27
Issue number4
DOIs
StatePublished - 15 Feb 2011

ASJC Scopus subject areas

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

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