ePrints

Poly(ferrocenylsilane) Electrolytes As A Gold Nanoparticle Foundry: "Two-In-One" Redox Synthesis and Electrosteric Stabilization, and Sensing Applications

Lookup NU author(s): Professor Yen Nee Tan

Downloads

• Published version [.pdf]

Licence

This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

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.

Publication metadata

Author(s): Song J, Tan YN, Janczewski D, Hempenius MA, Xu JW, Tana HR, Vancso GJ

Publication type: Article

Publication status: Published

Journal: Nanoscale

Year: 2017

Volume: 9

Pages: 19255-19262

Print publication date: 28/12/2017

Online publication date: 30/10/2017

Acceptance date: 28/10/2017

Date deposited: 07/04/2020

ISSN (print): 2040-3364

ISSN (electronic): 2040-3372

Publisher: Royal Society of Chemistry

URL: https://doi.org/10.1039/c7nr04697a

DOI: 10.1039/c7nr04697a

Altmetrics

Share