Nanoparticle assembly by confinement in wrinkles: Experiment and simulations

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Alexandra Schweikart - , University of Bayreuth (Author)
  • Andrea Fortini - , University of Bayreuth (Author)
  • Alexander Wittemann - , University of Bayreuth (Author)
  • Matthias Schmidt - , University of Bayreuth, University of Bristol (Author)
  • Andreas Fery - , University of Bayreuth (Author)

Abstract

We created hierarchically ordered structures of nanoparticles on smooth planar hydrophilic substrates by drying colloidal dispersions in confinement under macroscopic stamps with microscopically wrinkled surfaces. Experiments were carried out with model nanoparticle suspensions that possess high colloidal stability and monodispersity. The structures ranged from single parallel lines of particles to arrays of dense prismatic ridges. The type of observed structure could be controlled by the particle concentration in the initial dispersion. Confinement between two crossed stamps led to interconnected meshes of particles. The precise morphology could be predicted in all cases by Monte Carlo computer simulations of confined hard spheres. Our findings open up possibilities for versatile nanoparticle assembly on surfaces.

Details

Original languageEnglish
Pages (from-to)5860-5863
Number of pages4
JournalSoft matter
Volume6
Issue number23
Publication statusPublished - 7 Dec 2010
Peer-reviewedYes
Externally publishedYes