Nanoparticle assembly on topographical polymer templates: Effects of spin rate, nanoparticle size, ligand, and concentration

Mariela J. Pavan, Elina Ploshnik, Roy Shenhar

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The ability to assemble nanoparticles (NPs) into desired patterns in a controlled fashion is crucial for the study of collective properties and for the fabrication of a variety of NP-based devices. Drying-mediated assembly directed by a template provides a facile route for organizing NPs in predefined patterns. We utilize the branched topographical landscapes displayed by partially crystallized poly(ethylene glycol) (PEG) films as a generic template for studying the drying-mediated organization of dodecanethiol- and polystyrene thiol-protected gold NPs (Au-DT and Au-PS), and explore the combined effects of NP size and ligand, concentration, and spin rate on the distribution of NPs inside the channels. We show how NP concentration and the spin rate applied during NP deposition can be used to influence the tendency of NPs either to fill the channel uniformly or to localize near the channel edges, explain the important role of the enhanced aggregation tendency of larger NPs on the resulting morphologies, and demonstrate how this tendency can be tuned by the proper choice of ligands. The different effects are explained in the context of possible scenarios of drying-mediated assembly by analyzing the relevant interactions and forces acting on the NPs during solvent evaporation.

Original languageEnglish
Pages (from-to)13922-13931
Number of pages10
JournalJournal of Physical Chemistry B
Issue number47
StatePublished - 29 Nov 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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