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Topological defects in nematic liquid crystals of active colloidal rods

Objective

Active liquid crystals are out-of-equilibrium systems that display intriguing dynamic phenomena, arising from the interplay
between topological defects and collective motion. Here, we propose to experimentally study for the first time (i) the
dynamics of topological defects in the active colloidal nematic phase and (ii) the interplay between these topological defects
and collective dynamics, in three dimensions, at the single particle level, and with full control over the defects. To reach
these objectives, we first use a combination of advanced colloidal synthesis and surface modification techniques in order to
develop a model system of active colloidal rods of controlled size, aspect ratio and surface properties. We then confine this
newly developed model system in microfluidic channels, where the colloidal rods form a nematic liquid crystal. Topological
defects will be induced in the nematic phase using specific geometric constraints, which can be varied to control the
locations and strengths of the defects, or by optical trapping techniques. Finally, we use state-of-the-art confocal microscopy
and sophisticated image analysis techniques to follow, in real time and 3D real space, both the individual particle motion and
the collective dynamics in the system. Our work will thus provide experimental verification of the intriguing link between
topological defects and collective dynamics in active liquid crystals and inspire novel theories and simulation codes capable
of capturing the intrinsic complexity of coupling structure, orientation and activity.

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) H2020-MSCA-IF-2015

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Coordinator

THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 195 454,80
Address
WELLINGTON SQUARE UNIVERSITY OFFICES
OX1 2JD Oxford
United Kingdom

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Region
South East (England) Berkshire, Buckinghamshire and Oxfordshire Oxfordshire
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 195 454,80
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