Homodyne dynamic light scattering in supramolecular polymer solutions: anomalous oscillations in intensity correlation function

Soft Matter
Emilie MoulinEric Buhler

Abstract

Dilute solutions of electronically active molecules capable of irradiation-driven supramolecular self-assembly are studied by dynamic light scattering. We detect unusual well-defined oscillations in the long time range of the homodyne intensity correlation function for all solutions that were irradiated with white light prior to the measurements. The oscillation effect is attributed to the local laser-induced heating of the samples due to strongly enhanced absorption manifested by the supramolecular filaments. It is found that the oscillation frequency depends on the irradiation time, solution concentration, and the incident laser power, but is independent of the scattering angle. These observations are explained with a semi-quantitative theory relating the oscillation effect to thermo-gravitational convection flows generated by laser beam. The results suggest that the presence of such homodyne oscillations could be a sensitive probe for aggregation in many complex systems.

References

Dec 13, 2001·Chemical Reviews·L BrunsveldR P Sijbesma
Apr 24, 2002·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·W Schaertl, C Roos
Jul 21, 2006·The Journal of Physical Chemistry. B·Jacqueline AppellEric Buhler
Apr 15, 2008·Journal of Colloid and Interface Science·Luke ParkinsonJohn Ralston
Apr 1, 1979·The Review of Scientific Instruments·A WadaK Soda
Mar 17, 2012·Physical Chemistry Chemical Physics : PCCP·Nicolas JouaultEric Buhler
May 23, 2012·Nature Chemistry·Vina FaramarziNicolas Giuseppone
Feb 20, 2013·Angewandte Chemie·Jean-Marie Lehn
Jul 24, 2014·Journal of the American Chemical Society·Joseph J ArmaoNicolas Giuseppone
Mar 4, 2015·ACS Nano·Eric BusseronNicolas Giuseppone
Jan 19, 2017·Journal of the American Chemical Society·Joseph J Armao IvNicolas Giuseppone
Mar 28, 2019·Accounts of Chemical Research·Emilie MoulinNicolas Giuseppone

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Methods Mentioned

BETA
light
light scattering
dynamic light scattering
light-scattering

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