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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.
Jańczewski, D.
Hempenius, M. A.
Xu, J. W.
Tan, H. R.
Vancso, Gyula Julius
Keywords: Engineering::Materials
Issue Date: 2017
Source: Song, J., Tan, Y. N., Jańczewski, 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. doi:10.1039/c7nr04697a
Journal: Nanoscale
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.
ISSN: 2040-3364
DOI: 10.1039/c7nr04697a
Rights: © 2017 The Royal Society of Chemistry. This article is licensed under a Creative Commons Attributions 3.0 Unported License.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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