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Durham University

Research & business

Research lectures, seminars and events

The events listed in this area are research seminars, workshops and lectures hosted by Durham University departments and research institutes. If you are not a member of the University, but  wish to enquire about attending one of the events please contact the organiser or host department.


CMP: Carbon Nanotube-Based Lyotropic Liquid Crystal Microdroplets in Bulk and on Solid Surfaces

Presented by Prof. Paul van der Schoot, Department of Applied Physics, Eindhoven Technical University, Eindhoven (NL)
25 April 2018 13:00 in ph30

Dispersions of long, rod-like particles such as carbon nanotubes are known to form spindle-shaped,
cylindrically symmetric elongated nematic liquid crystalline droplets in coexistence with the isotropic phase.
Their shape and director field structure depends on the size of the drops, the interfacial tension, anchoring
strength and elastic constants. In contact with a wall, the droplets become more elongated due to the effects of line tension.
By visualising hundreds of nematic droplets of carbon nanotubes dissolved in chlorosulfonic acid and applying
elasticity theory to fit the data, we extract information on the elastic and surface properties of the droplets.
For sessile drops we find that the ratio of the line tension and the interfacial tension for this
particular system equals −0.84 ± 0.06 μm. This ratio is 2 orders of magnitude larger than what has been
reported for conventional fluids, in agreement with scaling arguments.

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