Controlling the assembly of hydrophobized gold nanoparticles at the air-water interface by varying the interfacial tension

Shweta Gupta, Nahar Singh, Murali Sastry, Rita Kakkar, Renu Pasricha

Research output: Contribution to journalArticlepeer-review

Abstract

Controlled assembly is the key to harness the nanoscale properties of nanoparticles in most technological applications and it has been an important challenge as it leads to the manipulation of interparticle properties. The present work depicts the control of the assembly of nanoparticles in the monolayers by evaporation kinetics and particle interactions at the air-liquid interface. In the presence of attractive particle-particle and particle-monolayers interactions, nanoparticles self assemble into a superlattice structure upon drying from a colloidal suspension on to the preformed lipid monolayers. This self-assembly mechanism produces monolayers with long-range ordering. However, rapid dewetting and high rate of evaporation can significantly undermine the extent of ordering. Using gold nanoparticles as vehicles for experimentation and by changing the monolayers and solvent, we here demonstrate that the extent of ordering of nanoparticles can be controlled.

Original languageEnglish (US)
Pages (from-to)1072-1077
Number of pages6
JournalThin Solid Films
Volume519
Issue number3
DOIs
StatePublished - Nov 30 2010

Keywords

  • Gold nanoparticles
  • Langmuir-Blodgett technique
  • Lipid monolayer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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