A5069278945- Pickering emulsions and particle stabilization
- Material Dynamics and Properties
- Surfactants and Colloidal Systems
- Enhanced Oil Recovery Techniques
- Micro and Nano Robotics
- Proteins in Food Systems
- RNA Research and Splicing
- Polymer crystallization and properties
- Marine and coastal plant biology
- Nanopore and Nanochannel Transport Studies
- Microfluidic and Bio-sensing Technologies
- Modular Robots and Swarm Intelligence
- Microtubule and mitosis dynamics
- Stochastic processes and statistical mechanics
- Microbial Metabolic Engineering and Bioproduction
- Biofuel production and bioconversion
- Fluid Dynamics and Heat Transfer
- Phase Equilibria and Thermodynamics
The University of Tokyo
2023-2024
Tokyo Metropolitan University
2017-2023
Living cells are characterized by the micrometric confinement of various macromolecules at high concentrations. Using droplets containing binary polymer blends as artificial cells, we previously showed that cell-sized causes phase separation solutions because length-dependent wetting polymers. Here, demonstrate confinement-induced heterogeneity polymers also emerges in single-component solutions. The resulting structural leads to a slower transport small molecules center than bulk...
Motile droplets using Marangoni convection are attracting attention for their potential as cell-mimicking small robots. However, the motion of relative to internal and external environments that generate has not been quantitatively described. In this study, we used an aqueous two-phase system [poly(ethylene glycol) (PEG) dextran] in elongated chamber motile dextran a constant PEG concentration gradient. We demonstrated move by convection, resulting from gradient active transport into out...
Intracellular molecular organization is often explained by attractive interactions driving clustering and phase separation. Although consideration of repulsive forces essential in physics, their roles remain unclear cellular contexts. Here, we demonstrated the fundamental role repulsion regulating protein diffusion within cell-size space. By analyzing negatively charged bulk solutions spaces with membranes, revealed that membrane-enhanced inhibited spaces. This was due to amplified...
Abstract Liquid foams respond plastically to external perturbations over some critical magnitude. This rearrangement process is directly related the mechanical properties of foams, playing a significant role in determining foam lifetime, deformability, elasticity, and fluidity. In this paper, we experimentally investigate dynamics near dry-wet transition. When transforms from dry state wet state, it found that considering collective events, separated T1 events propagate while occur...
Collapse of liquid films in a foam is characteristic compared to that individual films. The mechanism and physical conditions collective bubble collapse which directly contribute stability have been clarified.
Abstract Foams can be ubiquitously observed in nature and industrial products. Despite the relevance of their properties to deformation, fluidity, collapse, all which are essential for applications, there few experimental studies collective relaxation dynamics a wet foam. Here, we directly observe how changes with increasing liquid fraction both monodisperse polydisperse two-dimensional foams. As increase fraction, quantitatively characterize slowing-down relaxation, correlation length. We...
Abstract The stability of foams is an important subject not only for fundamental science, but applications in daily life. most destructive phenomenon underpinning foam collapse a collective bubble collapse, yet the mechanism behind this unclear. In study, we clarify dynamics quasi-two-dimensional by - situ observation with high speed camera. We find two modes collapse: one propagation liquid film breakage via impact stream another broken film. other distant due to penetration droplet,...
The states of foam are empirically classified into dry and wet by the volume fraction liquid. Recently, a transition between state has been found characterizing bubble shapes [Furuta et al., Sci. Rep. 6, 37506 (2016)2045-232210.1038/srep37506]. In literature, it is indirectly ascertained that from to form related onset rearrangement bubbles, namely, liquid at which bubbles become able move replace their positions. shape static property, dynamic property. Thus, we investigate relation event...
Upon decreasing the temperature, agarose solution exhibited gelation and phase separation, forming a cloudy gel consisting of agarose-rich agarose-poor phases. Both phenomena contribute to formation heterogeneous structure, but primary influence both processes on this heterogeneity remains unclear. In study, we defined specific separation temperatures an examined resulting structures with without separation. Microscopic observation colloid diffusion analysis revealed that leads...
Living cells are characterized by the micrometric confinement of various macromolecules at high concentrations. Using droplets containing binary polymer blends as artificial cells, we previously showed that cell-sized causes phase separation solutions because length-dependent wetting polymers. Here demonstrate wetting-induced heterogeneity polymers also emerges in single-component solutions. The resulting leads to a slower transport small molecules center than bulk This heterogeneous...
Abstract Liquid foams respond plastically to external perturbations over some critical magnitude. This relaxation process is directly related the mechanical properties of foams, playing a significant role in determining foam lifetime, deformability, elasticity, and fluidity. In this paper, we experimentally investigate dynamics near dry-wet transition. When transforms from dry state wet state, it found that mode changes sequential T1 events collective rearrangements. We show transition...
Abstract Liquid foams respond plastically to external perturbations over some critical magnitude. This relaxation process is directly related the mechanical properties of foams, playing a significant role in determining foam lifetime, deformability, elasticity, and fluidity. In this paper, we experimentally investigate dynamics near dry-wet transition. When transforms from dry state wet state, it found that mode changes sequential T1 events collective rearrangements. We show transition...