Effective temperatures from the fluctuation-dissipation measurements in soft glassy materials
| Autor: | Daisuke Mizuno, Sara Jabbari-Farouji, Didi Derks, Gerard H. Wegdam, Fred C. MacKintosh, Daniel Bonn, Christoph F. Schmidt |
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| Přispěvatelé: | Faculty of Science, IoP (FNWI), Soft Matter (WZI, IoP, FNWI), Soft Matter and Biological Physics, Physics of Living Systems, Theoretical Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Microrheology
Materials science Statistical Mechanics (cond-mat.stat-mech) Condensed matter physics Bandwidth (signal processing) FOS: Physical sciences General Physics and Astronomy Video microscopy Dissipation Condensed Matter - Soft Condensed Matter Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences 010305 fluids & plasmas Condensed Matter::Soft Condensed Matter Colloid 0103 physical sciences Soft Condensed Matter (cond-mat.soft) SDG 7 - Affordable and Clean Energy 010306 general physics Condensed Matter - Statistical Mechanics |
| Zdroj: | Europhysics Letters, 84(2):20006. IOP Publishing Ltd. Jabbari-Farouji, S, Mizuno, D, Derks, D, Wegdam, G H, Mac Kintosh, F C, Schmidt, C & Bonn, D 2008, ' Effective temperatures from the fluctuation-dissipation measurements in soft glassy materials ', Europhysics Letters, vol. 84, no. 2, 20006 . https://doi.org/10.1209/0295-5075/84/20006 EPL, 84(2):20006, 20006-1/6. Institute of Physics |
| ISSN: | 0295-5075 |
| DOI: | 10.1209/0295-5075/84/20006 |
| Popis: | We have investigated the validity of the fluctuation-dissipation theorem (FDT) and the applicability of the concept of effective temperature in a number of non-equilibrium soft glassy materials. Using a combination of passive and active microrheology to measure displacement fluctuations and the mechanical response function of probe particles embedded in the materials, we have directly tested the validity of the FDT. Our results show no violation of the FDT over several decades in frequency (1-10$^4$ Hz) for hard sphere colloidal glasses and colloidal glasses and gels of Laponite. We further extended the bandwidth of our measurements to lower frequencies (down to 0.1 Hz) using video microscopy to measure the displacement fluctuations, again without finding any deviations from the FDT. 6 pages, 4 Figures |
| Databáze: | OpenAIRE |
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