Yoav Tsori
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| Born : | 1968, Israel. | |
| Ph.D.: | 2001, Tel-Aviv University, Tel-Aviv. | |
| Department of Chemical Engineering - Senior Lecturer (since 2005). | ||
| Ben Gurion University of the Negev | ||
| Beer-Sheva, 84105, Israel | ||
| Phone : | 972-8-6477794 | |
| Fax: : | 972-8-6472916 | |
| tsori@bgu.ac.il | ||
Opening for a Ph.D. student or a post-doc
Subject: analytical & numerical study of a new type of phase-transition:
Phase-separation in liquid mixtures under the influence of external field.
basic mechanisms & possible applications
Keywords
Phase-transitions, electric field, demixing micelles, block-copolymer, polymer brush, nano-pore, E. Coli, self-organization.
Research interests
Finding new ways to control structures at the nanometer scale in soft materials. Theoretical understanding interfacial phenomena at the micron and sub-
micron scales, confinement effects, elastic forces, and the competition with external, switchable fields (e.g. electric field).
Research projects
- Theoretical study of phase-transitions and structural changes in ordered phases of block-copolymers, as a result of confinement, elastic forces, or external
- electric field. Orientation of ordered phases confined to thin-films.
- Phase-transitions in liquid mixtures under external spatially nonuniform electric or gravitational fields. Phase-separation in ion-containing mixtures.
- Conformations of curved objects (I.e. micelles) near solid surfaces. Competition between entropic, elastic and enthalpic forces.
- Non-trivial polymer brush conformations when the end-groups are charged.
- "Bacteria optics" : E. Coli bacteria sometimes behave in wave-like fashion. The similarity and dissimilarity with optics is explored in these complex systems.
Recent Publications
• Tsori Y., Tournilhac F. and Leibler L. , Demixing in Simple Fluids Induced by Electric Field Gradients, Nature 430, 544 (2004).
• Tsori Y., Sivaniah E., Andelman D. and Hashimoto T., Orientational transitions in symmetric diblock copolymers on rough surfaces, Macromolecules
(2005) [cond-mat/0504410].
• Tsori Y. and de Gennes P.-G., Damping of Acoustic Waves in Dilute Polymer Solutions, Macromolecules 37, 8195 (2004) [cond-mat/0407698].
• Tsori Y. and Leibler L., Electrostatic Cancellation of Gravity Effects in Liquid Mixtures, Phys. Rev. E Brief Reports, 71, 032101 (2005)
[cond- mat/0501744].
• Tsori Y. and de Gennes P.-G., Frustrated Rotations in Nematic Monolayers, Eur. Phys. J. E 14, 91 (2004) [cond-mat/0404259].
• Tsori Y. and de Gennes P.-G., Self Trapping of a Single Bacterium in its Own Chemoattractant, Europhys. Lett. 66, 599 (2004) [q-bio.PE/0405005].
• Tsori Y., One-Molecule Heating Using Nanopores, submitted (2005).
• Tsori Y. and Andelman D., Parallel and Perpendicular Lamellae on Corrugated Surfaces, Macromolecules 36, 8560 (2003) [cond-mat/0304334].
• Tsori Y., Tournilhac F. and Leibler L., Orienting Ion-Containing Block Copolymers Using AC Electric Fields, Macromolecules 36, 5873 (2003)
[cond-mat/0301116].
• Tsori Y., Tournilhac F., Andelman D. and Leibler L., Structural Changes in Block Copolymers: Coupling of Electric Field and Mobile Ions, Phys. Rev.
Lett. 90, 145504 (2003) [cond-mat/0208129].
• Tsori Y. and Andelman D., Thin Films of Diblock Copolymer in Electric Field: Transition from Perpendicular to Parallel Oriented Lamellae,
Macromolecules 35, 5161 (2002) [cond-mat/0110282].