Jump to main content
Jump to site search


Poly(ferrocenylsilane) Electrolytes as Gold Nanoparticle Foundry: “Two-in-One” Redox Synthesis and Electrosteric Stabilization, and Sensing Applications

Abstract

Gold nanoparticles (AuNPs) coated with responsive polymers gained considerable interest due to their controllable size, good stability, and fast environmental response suitable for biological applications, and sensing. Here we report on a simple, and efficient method for the synthesis of stable and redox responsive AuNPs using organometallic polyelectrolytes in aqueous solutions of HAuCl4. In the redox reaction, positively or negatively charged poly(ferrocenylsilanes) (PFS+/PFS-) served as reducing agents, and also as stabilizing polymer. Due to their unique tunable electrostatic and electrosteric protection, AuNPs coated with PFS- (PFS+)@ AuNPs possess high redox sensitivity, with reversible, repetitive, sustainable color switching between the assembled (purple color) and disassembled (red color) states as evidenced by UV-Vis absorption and TEM measurements. Feasibility studies reported in here indicate that the particles described can be applied as a colorimetric probe for detection of redox molecules, e.g. Vitamin C, in a controlled and facile manner.

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Jun 2017, accepted on 28 Oct 2017 and first published on 30 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR04697A
Citation: Nanoscale, 2017, Accepted Manuscript
  •   Request permissions

    Poly(ferrocenylsilane) Electrolytes as Gold Nanoparticle Foundry: “Two-in-One” Redox Synthesis and Electrosteric Stabilization, and Sensing Applications

    J. Song, Y. N. Tan, D. Janczewski, M. A. Hempenius, J. Xu, H. R. Tan and G. J. Vancso, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04697A

Search articles by author

Spotlight

Advertisements