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Connecting and disconnecting nematic disclination lines in microfluidic channels.

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Agha,  Hakam
Group Structure formation in soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Bahr,  Christian
Group Structure formation in soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Agha, H., & Bahr, C. (2016). Connecting and disconnecting nematic disclination lines in microfluidic channels. Soft Matter, 12(18), 4266-4273. doi:10.1039/C5SM03092G.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-38C9-7
Abstract
Disclination lines in nematic liquid crystals can be used as ‘‘soft rails’’ for the transport of colloids or droplets through microfluidic channels [A. Sengupta, C. Bahr and S. Herminghaus, SoftMatter , 2013, 9 , 7251]. In the present study we report on a method to connect and disconnect disclination lines in microfluidic channels using the interplay between anchoring, flow, and electric field. We show that the application of an electric field establishes a continuous disclination that spans across a channel region in which a disclination usually would not exist (because of different anchoring conditions), demonstrating an interruptible and reconnectable soft rail for colloidal transport.