TY - JOUR
T1 - Poly(ferrocenylsilane) electrolytes as a gold nanoparticle foundry
T2 - "two-in-one" redox synthesis and electrosteric stabilization, and sensing applications
AU - Tan, Y. N.
AU - Jańczewski, Dominik
AU - Hempenius, M. A.
AU - Xu, J. W.
AU - Tan, H. R.
AU - Vancso, G. J.
PY - 2017/12/28
Y1 - 2017/12/28
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85038431092&partnerID=8YFLogxK
U2 - 10.1039/c7nr04697a
DO - 10.1039/c7nr04697a
M3 - Article
AN - SCOPUS:85038431092
VL - 9
SP - 19255
EP - 19262
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 48
ER -