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

Alvarez, Laura; Lettinga, M. P.; Grelet, Éric

doi:10.1103/physrevlett.118.178002

Cited by 22 publications

(36 citation statements)

References 40 publications

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“…On the other hand, the diffusion of non-spherical particles in anisotropic liquid crystalline environments is still largely unexplored. Recently, Alvarez et al [9] studied in experiments the diffusion of tracer amounts of non-commensurate guest viral rods in a smectic phase of shorter host fd filamentous viruses with a size ratio L guest /L host ≃ 1.3. Surprisingly they found that while the host particles experience the usual hopping-type dynamics across smectic layers, the noncommensurate guest particles undergo a fast and almost continuous nematic-like diffusion, yielding the exceptional case of larger guest particles diffusing faster than the smaller host ones.…”

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Speeding up Dynamics by Tuning the Noncommensurate Size of Rodlike Particles in a Smectic Phase

2020

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Using simulations, we study the diffusion of rod-like guest particles in a smectic environment of rod-like host particles. We find that the dynamics of guest rods across smectic layers changes from a fast nematic-like diffusion to a slow hopping-type dynamics via an intermediate switching regime by varying the length of the guest rods with respect to the smectic layer spacing. We determine the optimal rod length that yields the fastest and the slowest diffusion in a lamellar environment. We show that this behavior can be rationalized by a complex 1D effective periodic potential exhibiting two energy barriers, resulting in a varying preferred mean position of the guest particle in the smectic layer. The interplay of these two barriers controls the dynamics of the guest particles yielding a slow, an intermediate and a fast diffusion regime depending on the particle length.

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“…Similarly, for guest rods shorter than the smectic layer spacing, the time interval of caging decreases (r ∼ 0.47) and eventually disappears for guest particles of low anisotropy (r ∼ 0.29). [9]. The inset shows the raw diffusion coefficients.…”

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Speeding up Dynamics by Tuning the Noncommensurate Size of Rodlike Particles in a Smectic Phase

2020

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“…The most promising and thus exploited are filamentous phages, i.e., Ff, f1, Ike, fd, Pf1, and M13. Their length (up to 800 nm) and width (down to 8 nm) are perfect for the synthesis of nanowires and the fibrous components of composites [ 99 , 153 , 154 , 155 , 156 , 157 ].…”

Section: Bacteriophages In Materials Sciencementioning

confidence: 99%

Application of Bacteriophages in Nanotechnology

Paczesny

Bielec

2020

Nanomaterials

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Bacteriophages (phages for short) are viruses, which have bacteria as hosts. The single phage body virion, is a colloidal particle, often possessing a dipole moment. As such, phages were used as perfectly monodisperse systems to study various physicochemical phenomena (e.g., transport or sedimentation in complex fluids), or in the material science (e.g., as scaffolds). Nevertheless, phages also execute the life cycle to multiply and produce progeny virions. Upon completion of the life cycle of phages, the host cells are usually destroyed. Natural abilities to bind to and kill bacteria were a starting point for utilizing phages in phage therapies (i.e., medical treatments that use phages to fight bacterial infections) and for bacteria detection. Numerous applications of phages became possible thanks to phage display—a method connecting the phenotype and genotype, which allows for selecting specific peptides or proteins with affinity to a given target. Here, we review the application of bacteriophages in nanoscience, emphasizing bio-related applications, material science, soft matter research, and physical chemistry.

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“…While most of the existing studies address structural properties, less is known about the dynamic behavior of anisotropic particles. The most well-studied systems in this regard are perhaps colloidal rods and ellipsoids (1)(2)(3)(4)(5)(6)(7)(8)(9). However, because most of these studies involved particle tracking, they are therefore limited to quasi-2D (two dimension) and to self-diffusion.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic dynamics and kinetic arrest of dense colloidal ellipsoids in the presence of an external field studied by differential dynamic microscopy

et al. 2020

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Anisotropic dynamics on the colloidal length scale is ubiquitous in nature. Of particular interest is the dynamics of systems approaching a kinetically arrested state. The failure of classical techniques for investigating the dynamics of highly turbid suspensions has contributed toward the limited experimental information available up until now. Exploiting the recent developments in the technique of differential dynamic microscopy (DDM), we report the first experimental study of the anisotropic collective dynamics of colloidal ellipsoids with a magnetic hematite core over a wide concentration range approaching kinetic arrest. In addition, we have investigated the effect of an external magnetic field on the resulting anisotropic collective diffusion. We combine DDM with small-angle x-ray scattering and rheological measurements to locate the glass transition and to relate the collective short- and long-time diffusion coefficients to the structural correlations and the evolution of the zero shear viscosity as the system approaches an arrested state.

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

Cited by 22 publications

References 40 publications

Speeding up Dynamics by Tuning the Noncommensurate Size of Rodlike Particles in a Smectic Phase

Speeding up Dynamics by Tuning the Noncommensurate Size of Rodlike Particles in a Smectic Phase

Application of Bacteriophages in Nanotechnology

Anisotropic dynamics and kinetic arrest of dense colloidal ellipsoids in the presence of an external field studied by differential dynamic microscopy

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