Open AccessOptical tweezers based active microrheology of sodium polystyrene sulfonate (NaPSS)
Author(s) -
ChiaChun Chiang,
Ming-Tzo Wei,
Yin-Quan Chen,
Pei-Wen Yen,
Yi-Chiao Huang,
Jun-Yeh Chen,
Olivier Lavastre,
Guillaume Husson,
Guillaume Darsy,
Arthur Chiou
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.008847
Subject(s) - microrheology , viscoelasticity , optical tweezers , materials science , polymer , polystyrene , rheology , micelle , viscosity , rheometry , elastic modulus , polystyrene sulfonate , modulus , optics , chemistry , composite material , physics , aqueous solution , pedot:pss
We used oscillatory optical tweezers to investigate the microrheological properties of Sodium polystyrene sulfonate (NaPSS; Mw = 70 kDa) polymer solutions with different concentrations from 0.001 mM to 10 mM in terms of elastic modulus G'(ω) and loss modulus G"(ω) as a function of angular frequency (ω) in the range of 6 rad/s to 6000 rad/s. The viscoelastic properties (including zero-shear-rate viscosity, crossing frequency and transition frequency) as a function of polymer concentration, deduced from our primary data, reveal the subtle structural changes in the polymer solutions as the polymer concentration increases from dilute to semi-dilute regimes, passing through the critical micelle formation concentration and the polymer overlapping concentration. The experimental results are consistent with the Maxwell model in some regime, and with the Rouse model in other, indicating the transient network character and the micelles formation in different regimes.