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Issue 48, 2017
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Poly(ferrocenylsilane) electrolytes as a gold nanoparticle foundry: “two-in-one” redox synthesis and electrosteric stabilization, and sensing applications

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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 polymers. 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 here indicate that the particles described can be applied as a colorimetric probe for the detection of redox molecules, e.g. vitamin C, in a controlled and facile manner.

Graphical abstract: Poly(ferrocenylsilane) electrolytes as a gold nanoparticle foundry: “two-in-one” redox synthesis and electrosteric stabilization, and sensing applications

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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, 2017,9, 19255-19262
  • Open access: Creative Commons BY license
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    Poly(ferrocenylsilane) electrolytes as a gold nanoparticle foundry: “two-in-one” redox synthesis and electrosteric stabilization, and sensing applications

    J. Song, Y. N. Tan, D. Jańczewski, M. A. Hempenius, J. W. Xu, H. R. Tan and G. J. Vancso, Nanoscale, 2017, 9, 19255
    DOI: 10.1039/C7NR04697A

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