Please use this identifier to cite or link to this item: https://doi.org/10.1039/c7nr04697a
Title: Poly(ferrocenylsilane) electrolytes as a gold nanoparticle foundry: "two-in-one" redox synthesis and electrosteric stabilization, and sensing applications
Authors: Song, J
Tan, Y.N 
Ja?czewski, D
Hempenius, M.A
Xu, J.W 
Tan, H.R
Vancso, G.J
Keywords: Color
Colorimetry
Electrolytes
Gold
Metal nanoparticles
Nanoparticles
Organometallics
Plastic coatings
Polyelectrolytes
Polymers
Polysilanes
Redox reactions
Reducing agents
Solutions
Biological applications
Colorimetric probes
Electrosteric stabilization
Environmental response
Feasibility studies
Poly(ferrocenylsilanes)
Sensing applications
UV-vis absorptions
Synthesis (chemical)
Issue Date: 2017
Publisher: Royal Society of Chemistry
Citation: Song, J, Tan, Y.N, Ja?czewski, D, Hempenius, M.A, Xu, J.W, Tan, H.R, Vancso, G.J (2017). Poly(ferrocenylsilane) electrolytes as a gold nanoparticle foundry: "two-in-one" redox synthesis and electrosteric stabilization, and sensing applications. Nanoscale 9 (48) : 19255-19262. ScholarBank@NUS Repository. https://doi.org/10.1039/c7nr04697a
Rights: Attribution 4.0 International
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. © 2017 The Royal Society of Chemistry.
Source Title: Nanoscale
URI: https://scholarbank.nus.edu.sg/handle/10635/178547
ISSN: 2040-3364
DOI: 10.1039/c7nr04697a
Rights: Attribution 4.0 International
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