Haifei Zhang

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Definitions

No. Definitions
1 Optical Tweezers
2 Polymer
3 Granular Matter
4 Capillary number
5 Surfactant
6 DNA
7 Cell
8 Concentration
9 Convective instability

Weekly wiki entries

Lecture topic Weekly entry for the soft-matter wiki, based on publications
1. General introduction Memories of paste
2. Surface forces Electrostatics for Explorting the Nature of Water Adsorption on the Laponite Sheets' Surface
3. Capillarity and wetting Three-dimensional direct imaging of structural relaxation near the colloidal glass transition
4. Polymers and polymer solutions DNA molecules and configurations in a solid-state nanopore microscope
5. Surfactants and spontaneous ordering Three-Dimensional Self-Assembly of Complex, Millimeter-Scale Structures Through Capillary Bonding Structures
6. Equilibria and phase diagrams Visualizing dislocation nucleation by indenting colloidal crystals
7. Charged interfaces Like-Charged Particles at Liquid Interfaces
8. Colloidal stability Fluids of Clusters in Attractive Colloids
9. Rheology and viscoelasticity Localized and extended deformations of elastic shells
10. Foams (homework cut down)
11. Emulsions (homework cut down)
Summary and review

Interesting stuff

Soft Matter research group around the world

http://www.softmatterworld.org/network/googlemap_basic.html


Click here to see Soft Matter research groups around the world






Where science meets art

Soft Matter research not only yields interesting result, but beautiful images too: from brightly-colored liquid crystals, to fascinating textures and shapes in biological materials.

The TGBA*-SmA* transition in a mixture of an unusual antiferroelectric liquid crystal, with two stereogenic centers, and a standard achiral nematic-SmC-mesogen. See J.P.F. Lagerwall et al., J. Chem. Phys., 122, p. 144906 (2005)
A phase transition of a rather unique dimesogenic chiral liquid crystal, in which the mesogens change their conformation at the phase transition between linear (high-temperature cholesteric phase) and bent (low-temperature smectic phase). In cells of about 5 micron thickness (DSCN6047) the transition goes from an extreme short-pitch cholesteric (black) to a bent-core-SmC*-like phase (myelin-like domains) via a transitional blue phase-like texture (the colorful regimes), whereas the transition in a much thinner cell (0.8 micron, the other photo) is instead characterized by a texture more typical of columnar phases. See J.P.F. Lagerwall, et al., Chem. Mater., 16, 3606 (2004)
Polarized microscopy image of the B2 liquid crystalline phase (100x magnification). Linda Hirst, University of Califonia, Merced.
Fluorescence microscopy image of an F-actin bundle network in solution. F-actin filaments are labeled with Alexa-488 Phalloidin(630 x magnification), Linda Hirst, University of Califonia, Merced.
A phase transition of a rather unique dimesogenic chiral liquid crystal, in which the mesogens change their conformation at the phase transition between linear (high-temperature cholesteric phase) and bent (low-temperature smectic phase). In cells of about 5 micron thickness (DSCN6047) the transition goes from an extreme short-pitch cholesteric (black) to a bent-core-SmC*-like phase (myelin-like domains) via a transitional blue phase-like texture (the colorful regimes), whereas the transition in a much thinner cell (0.8 micron, the other photo) is instead characterized by a texture more typical of columnar phases. See J.P.F. Lagerwall, et al., Chem. Mater., 16, 3606 (2004)
Polarized light microscopy image of the B1 liquid crystalline phase (100x magnification), Linda Hirst, University of Califonia, Merced.


Polarized microscopy image of the cholesteric (chiral nematic) liquid crystalline phase (100x magnification). Jennifer Kirchhoff, Florida State University.