Kyushu University Academic Staff Educational and Research Activities Database
List of Presentations
Daisuke Mizuno Last modified date:2023.11.22

Professor / material physics / Department of Physics / Faculty of Sciences


Presentations
1. 水野大介, Critical Jamming and gel rheology of droplet suspensions in living cells, 第60回 生物物理学会年会, 2022.10.
2. 水野大介, Critical Jamming and gel rheology of droplet suspensions in living cells, 25 th Anniversary Symposium for German-Japanese Non-Equilibrium Statistical Physics, 2022.09.
3. K. Nishizawa, D. Mizuno, Mechanical activity induces fragile to strong transition of glassy cytoplasm in living cells, 8th World Congress of Biomechanics, 2020.04.
4. F. Esterik, M. Ikenaga, H. Niwa, D. Mizuno, Enhanced Viscosity of the Cytoplasm at the Later Stage, 8th World Congress of Biomechanics, 2020.04.
5. Daisuke Mizuno, Umeda Katsuhiro, Sugino Yujiro, Kenji Nishizawa, Optical trap and laser interferometry in living cells, Biomedical Imaging and Sensing Conference 2019, BISC 2019, 2019.01, Mechanics of living cell interior are governed by cytoskeletons and cytosol. They are extraordinarily heterogeneous and their physical properties are strongly affected by the internally generated forces. In order to understand the out-ofequilibrium mechanics, we have developed a method of microrheology using laser interferometry and optical trapping technology. This method allowed us to probe mechanics and dynamics in living cells with a high spatio-temporal resolution. Microscopic probes in cells are stably trapped in the presence of vigorous cytoplasmic fluctuations, by employing smooth 3D feedback of a piezo-actuated sample stage. To interpret the data, we present a theory that adapts the fluctuation-dissipation theorem (FDT) to out-of-equilibrium systems. We discuss the interplay between material properties and non-thermal force fluctuations in the living cells that we quantify through the violations of the FDT..
6. 西澤賢治, 水野大介, Glassy cytoplasm driven by non-thermal forces, Soft Matter Physics: from the perspective of the essential heterogeneity, 2018.12.
7. D. Mizuno, Non-Gaussian limit fluctuations in active swimmer suspensions, Soft Matter Physics: from the perspective of the essential heterogeneity, 2018.12.
8. D. Mizuno, Universal glass-forming behavior of in vitro and living cytoplasm ~its similarity to droplet suspensions?~, EMBO | EMBL Symposium: Cellular Mechanisms Driven by Liquid Phase Separation, 2018.05.
9. 水野 大介, 有留真人, 栗原喬, Heev Ayade, Irwin zaid, Non-Gauss athermal fluctuations in Bacterial bath, 58th annual meeting of Biophysical Society, 2014.02.
10. Daisuke Mizuno, Masato Aridome, takasi kurihara, Heev Ayade, Irwin Zaid, Non-Gauss athermal fluctuations in Bacterial bath, KITP conference "Active Processes in Living and Nonliving Matter", 2014.02.
11. Daisuke Mizuno, Heev Ayade, Irwin Zaid, Athermal Fluctuations of Probe Particles in Active Cytoskeletal Network, 58th annual meeting of Biophysical Society, 2014.02.
12. Daisuke Mizuno, Irwin Zaid, Athermal Fluctuations of Probe Particles in Active Cytoskeletal Network, KITP conference "Active Processes in Living and Nonliving Matter", 2014.02.
13. Daisuke Mizuno, Levy statistics and dynamics in active cytoskeletons, 15th SPVM National Physics Conference in Davao, 2013.10.
14. Daisuke Mizuno, Levy statistics and dynamics in active cytoskeletons, 2013 SPP Physics Congress, 2013.10.
15. Daisuke Mizuno, Kenji Nishizawa, Miho Yanagisawa, Kei Fujiwara, Microrheology study of crowding effects on cell mechanics, International Soft Matter Conference, 2013.09.
16. Daisuke Mizuno, Heev Ayade, Irwin Zaid, Levy statistics and dynamics in active cytoskeletons, International Soft Matter Conference, 2013.09.
17. Daisuke Mizuno, Levy statistics and dynamics in active cytoskeletons, Taiwan International Workshop on Biological Physics and Complex Systems (BioComplex-Taiwan-2013), 2013.07.
18. Daisuke Mizuno, Non-Gauss athermal fluctuations in active cytoskeletons, The 50th Annual Meeting of the BSJ,Symposium “Living matter far from equilibrium: from DNA to cytoskeletons and cells”, 2012.09.
19. Daisuke Mizuno, Heev Ayade, Non-Gauss a-thermal fluctuations in active cytoskeletons, Biological & Pharmaceutical Complex Fluids: New Trends in Characterizing Microstructure, Interactions & Properties An ECI Conference, 2012.08.
20. 26pPSA-42 Non-equilibrium fluctuation in active cytoskeltons.
21. 28pVC-16 Non-equilibrium fluctuation in active cytoskeltons.
22. 30pVC-1 High resolution probing of active cellular traction.
23. 21pVA-4 Nonequilibrium mechanics and dynamics of active cytoskeletons.
24. Daisuke Mizuno, M. Atakhorrami, K. M. Addas, J. X. Tang, G. H. Koenderink, F. C. MacKintosh, C. F. Schmidt, Laser trapping and laser interferometry for high-bandwidth micromechanical probing of biomaterials, Asia Optical Fiber Communication and Optoelectronic Exposition and Conference, AOE 2008, 2008.01, We present techniques based on optical trapping of micron-sized particles as probes and detecting their motion with sub-nanometer accuracy at 100 kHz bandwidth that can measure viscoelastic properties of biomaterials and cells on micrometer scales..
25. C. F. Schmidt, D. Mizuno, Linear and nonlinear laser-trapping microrheology, Optical Trapping and Optical Micromanipulation IV, 2007.12, We have developed a high-bandwidth technique for active 2-particle microrheology (AMR) with which we can probe linear and nonlinear responses of soft materials. Micron-sized colloidal probe particles are driven by an oscillating optical trap, and the resulting correlated motions of neighboring particles are detected by laser interferometry. Lock-in detection at the driving frequency and at its second harmonic makes it possible to measure the linear and the non-linear response of the embedding medium at the same time. We demonstrate the sensitivity of the method by detecting a second-harmonic response in water which is of purely geometric origin and which can be fully understood within linear hydrodynamics..
26. Yasuyuki Kimura, Daisuke Mizuno, Dynamics of nano-sized colloidal particles in a lyotropic lamellar phase, 3rd International Symposium on Slow Dynamics in Complex Systems, 2004.04, Transport of nano-sized colloidal particles in a dilute lyotropic lamellar phase of a nonionic surfactant has been studied by AC electrophoretic light scattering. The frequency dispersion of complex electrophoretic mobility shows two relaxation processes at about 1kHz (HF relaxation) and a few Hz (LF relaxation). These relaxations are originated from the hindrance of diffusion of particles in characteristic local structures of lamellar phase. The HF relaxation is found to relate the local deformation of membranes induced by particles. The LF one relates the confinement of a particle within persistence length of lamellar orientation..
27. Wide Band Spectroscopy of Complex Electrophoretic Mobility in Colloidal Suspension.
28. Dynamics of the fluctuation in colloidal crystals.
29. A.C. Electrophoresis of charged colloidal particles.
30. D. Mizuno, K. Hattori, K. Sakai, K. Takagi, Dynamic measurement of surface properties with Ripplon spectroscopy, Proceedings of the 1998 International Ultrasonics Symposium, 1998.12, Ripplon light scattering technique was applied for the investigation of the mechanical properties of the surface of surfactant solution. The velocity and damping constant of the ripplon were measured for decyl-alcohol solution under periodical modulation of the surface area and the dynamic surface tension was obtained in the frequency range of 10-3-10-1 Hz. The relaxation of surface elasticity due to the adsorption and desorption of the surfactant molecules was successfully observed..
31. Dynamics of Bilayer Membranes in the Sponge Phase of Non-Ionic Micelles
We have studied the sponge phase (L_3) of binary mixture of C_E_5 and water by the dynamic light scattering technique. At the concentration above 2w%, an almost single relaxation related with the cooparative diffusion of membranes is detected. The dynamic correlation lengh is evaluated from the diffusion constant to be a little larger than that obtained for the L_α phase. At the concentration below 2w%, we can find the crossover behavior Γ∝q^2 to Γ∝q^3 in the dispersion relation between the inverse correlation time Γ and the scattering wavenumber q..