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Письма в Журнал экспериментальной и теоретической физики, 2004, том 79, выпуск 3, страницы 148–152
(Mi jetpl2222)
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Эта публикация цитируется в 4 научных статьях (всего в 4 статьях)
КОНДЕНСИРОВАННЫЕ СРЕДЫ
Probing structural relaxation in complex fluids by critical fluctuations
A. F. Kostkoab, M. A. Anisimova, J. V. Sengersa a Institute for Physical Science and Technology and Department of Chemical Engineering, University of Maryland, College Park, MD 20742, USA
b Department of Physics, St. Petersburg State University of Refrigeration and Food Engineering, 191002 St. Petersburg, Russia
Аннотация:
Complex fluids, such as polymer solutions and blends, colloids and gels, are of growing interest in fundamental and applied soft-condensed-matter science. A common feature of all such systems is the presence of a mesoscopic structural length scale intermediate between atomic and macroscopic scales. This mesoscopic structure of complex fluids is often fragile and sensitive to external perturbations. Complex fluids are frequently viscoelastic (showing a combination of viscous and elastic behaviour) with their dynamic response depending on the time and length scales. Recently, non-invasive methods to infer the rheological response of complex fluids have gained popularity through the technique of microrheology, where the diffusion of probe spheres in a viscoelastic fluid is monitored with the aid of light scattering or microscopy. Here we propose an alternative to traditional microrheology that does not require doping of probe particles in the fluid (which can sometimes drastically alter the molecular environment). Instead, our proposed method makes use of the phenomenon of “avoided crossing” between modes associated with the structural relaxation and critical fluctuations that are spontaneously generated in the system.
Поступила в редакцию: 16.12.2003
Образец цитирования:
A. F. Kostko, M. A. Anisimov, J. V. Sengers, “Probing structural relaxation in complex fluids by critical fluctuations”, Письма в ЖЭТФ, 79:3 (2004), 148–152; JETP Letters, 79:3 (2004), 117–120
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl2222 https://www.mathnet.ru/rus/jetpl/v79/i3/p148
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