Orientational coupling amplification in ferroelectric nematic colloids

Orientational coupling amplification in ferroelectric nematic colloids

We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infrared spectroscopy, and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nemat...

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Veröffentlicht in:Physical review letters 2006-10, Vol.97 (14), p.147801-147801, Article 147801
Hauptverfasser: Li, Fenghua, Buchnev, Oleksandr, Cheon, Chae Il, Glushchenko, Anatoliy, Reshetnyak, Victor, Reznikov, Yuri, Sluckin, Timothy J, West, John L
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container_end_page 147801
container_issue 14
container_start_page 147801
container_title Physical review letters
container_volume 97
creator Li, Fenghua
Buchnev, Oleksandr
Cheon, Chae Il
Glushchenko, Anatoliy
Reshetnyak, Victor
Reznikov, Yuri
Sluckin, Timothy J
West, John L
description We investigated the physical properties of low concentration ferroelectric nematic colloids, using calorimetry, optical methods, infrared spectroscopy, and capacitance studies. The resulting homogeneous colloids possess a significantly amplified nematic orientational coupling. We find that the nematic orientation coupling increases by approximately 10% for particle concentrations of 0.2%. A manifestation of the increased orientational order is that the clearing temperature of a nematic colloid increases by up to 40 degrees C compared to the pure liquid crystal host. A theoretical model is proposed in which the ferroelectric particles induce local dipoles whose effective interaction is proportional to the square of the orientational order parameter.
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title Orientational coupling amplification in ferroelectric nematic colloids
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