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Article Dans Une Revue Physical Review Letters Année : 2017

Fast Diffusion of Long Guest Rods in a Lamellar Phase of Short Host Particles

Résumé

We investigate the dynamic behavior of long guest rodlike particles immersed in liquid crystalline phases formed by shorter host rods, tracking both guest and host particles by fluorescence microscopy. Counterintuitively, we evidence that long rods diffuse faster than short rods forming the one-dimensional ordered smectic-A phase. This results from the larger and noncommensurate size of the guest particles as compared to the wavelength of the energy landscape set by the lamellar stack of liquid slabs. The long guest particles are also shown to be still mobile in the crystalline smectic-B phase, as they generate their own voids in the adjacent layers.

Dates et versions

hal-01522021 , version 1 (12-05-2017)

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Laura Alvarez, M. Paul Lettinga, Eric Grelet. Fast Diffusion of Long Guest Rods in a Lamellar Phase of Short Host Particles. Physical Review Letters, 2017, 118 (178002), pp. 1-5. ⟨10.1103/PhysRevLett.118.178002⟩. ⟨hal-01522021⟩

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