Gold nanoparticle ring arrays from core–satellite nanostructures made to order by hydrogen bond interactions
2022 | journal article; research paper. A publication with affiliation to the University of Göttingen.
Jump to: Cite & Linked | Documents & Media | Details | Version history
Documents & Media
Details
- Authors
- Cai, Yingying; Peng, Wentao; Vana, Philipp
- Abstract
- Polymer-grafted gold nanoparticles are attached to silica nanoparticles forming core–satellite structures, which rearrange into ring arrays when cast to surface. By etching away the silica core, ring-shaped patterns of gold nanoparticles are formed.
Polyethylene glycol-grafted gold nanoparticles are attached to silica nanoparticle cores via hydrogen bonding in a controlled fashion, forming well-defined core–satellite structures in colloidal solution. For separating these complex structures effectively from the parental nanoparticles, a straightforward and easy protocol using glass beads has been developed. The attached gold nanoparticles show unique surface mobility on the silica core surface, which allows for nanoparticle rearrangement into a 2D ring pattern surrounding the silica nanoparticle template when the core–satellite structures are cast to a planar surface. When etching away the silica core under conditions in which the polymer shell fixes the satellites to the substrate, highly ordered ring-shaped patterns of gold nanoparticles are formed. By variation of the size of the parental particles – 13 to 28 nm for gold nanoparticles and 39 to 62 nm for silica nanoparticles – a great library of different ring-structures regarding size and particle number is accessible with relative ease. The proposed protocol is low-cost and can easily be scaled up. It moreover demonstrates the power of hydrogen bonds in polymers as a dynamic anchoring tool for creating nanoclusters with rearrangement ability. We believe that this concept constitutes a powerful strategy for the development of new and innovative nanostructures. - Issue Date
- 2022
- Journal
- Nanoscale Advances
- Organization
- Institut für Physikalische Chemie
- eISSN
- 2516-0230
- Language
- English
- Sponsor
- Open-Access-Publikationsfonds 2022