Jump to main content
Jump to site search

Issue 30, 2016
Previous Article Next Article

Showing particles their place: deterministic colloid immobilization by gold nanomeshes

Author affiliations

Abstract

The defined immobilization of colloidal particles on a non-close packed lattice on solid substrates is a challenging task in the field of directed colloidal self-assembly. In this contribution the controlled self-assembly of polystyrene beads into chemically modified nanomeshes with a high particle surface coverage is demonstrated. For this, solely electrostatic interaction forces were exploited by the use of topographically shallow gold nanomeshes. Employing orthogonal functionalization, an electrostatic contrast between the glass surface and the gold nanomesh was introduced on a sub-micron scale. This surface charge contrast promotes a highly site-selective trapping of the negatively charged polystyrene particles from the liquid phase. AFM force spectroscopy with a polystyrene colloidal probe was used to rationalize this electrostatic focusing effect. It provides quantitative access to the occurring interaction forces between the particle and substrate surface and clarifies the role of the pH during the immobilization process. Furthermore, the structure of the non-close packed colloidal monolayers can be finely tuned by varying the ionic strength and geometric parameters between colloidal particles and nanomesh. Therefore one is able to specifically and selectively adsorb one or several particles into one individual nanohole.

Graphical abstract: Showing particles their place: deterministic colloid immobilization by gold nanomeshes

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Apr 2016, accepted on 06 Jul 2016 and first published on 07 Jul 2016


Article type: Paper
DOI: 10.1039/C6NR03113G
Citation: Nanoscale, 2016,8, 14556-14564
  • Open access: Creative Commons BY license
  •   Request permissions

    Showing particles their place: deterministic colloid immobilization by gold nanomeshes

    C. Stelling, A. Mark, G. Papastavrou and M. Retsch, Nanoscale, 2016, 8, 14556
    DOI: 10.1039/C6NR03113G

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements