Ambient, rapid and facile deposition of polymer brushes for immobilization of plasmonic nanoparticles


Yılmaz H. , Pekdemir S. , Ipekci H. H. , Kiremitler N. B. , Hancer M. , Önses M. S.

APPLIED SURFACE SCIENCE, vol.385, pp.299-307, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 385
  • Publication Date: 2016
  • Doi Number: 10.1016/j.apsusc.2016.05.132
  • Title of Journal : APPLIED SURFACE SCIENCE
  • Page Numbers: pp.299-307
  • Keywords: Polymer brushes, Nanoparticles, Poly(2-vinyl pyridine), Gold, Surface functionalization, ENHANCED RAMAN-SCATTERING, SELF-ASSEMBLED MONOLAYERS, POLY(ETHYLENE GLYCOL) BRUSHES, BLOCK-COPOLYMER FILMS, GOLD NANOPARTICLES, AU NANOPARTICLES, SILVER NANOPARTICLES, SURFACE INTERACTIONS, ARRAYS, SERS

Abstract

The immobilization of nanoparticles (NPs) is of great interest to many technological applications and scientific fields. Methods to immobilize NPs either lack the uniformity, robustness and controllability or require complex and impractical preparation techniques. This paper aims in closing this gap by presenting practical routes in preparation of poly(2-vinyl pyridine) (P2VP) brush grafted silicon oxide terminated substrates for immobilization of NPs. Here, we demonstrate that hydroxyl-terminated P2VP can be deposited using different coating techniques and grafted in air at processing times as short as a few minutes. The grafted P2VP brushes can immobilize spherical Au nanoparticles that are 20 nm in diameter, on the surface of substrates with densities as high as similar to 600 particles/mu m(2). The density of the immobilized NPs can be further tuned with the grafting conditions and duration of the particle treatment. More than 80% of the grafted brushes and Au NPs remain on the substrate following abrasion tests proving mechanical robustness of the coatings. The immobilized Au NPs can impart surface enhanced Raman scattering effects in sensing of molecules, illustrating a representative use of the presented platform. (C) 2016 Elsevier B.V. All rights reserved.