Single-File Diffusion of Driven Interacting Colloids

Euán-Díaz, Edith C.; Herrera-Velarde, Salvador; Peeters, F. M.; Castañeda-Priego, Ramón

doi:10.1142/s1793048014400086

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…when the colloids are subjected to periodic external fields, independently of the commensurability parameter [39,40,43], p, which quantifies the competition between the number of colloidal particles and the number of minima of the external field along the channel, and the value of the coupling,…”

Section: Directed Self-assembly and Anomalous Transport Of Colloidsmentioning

confidence: 99%

Colloidal Soft Matter Physics

Castañeda-Priego

2021

Rev. Mex. Fís.

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Colloidal soft matter is a class of materials that exhibit rich equilibrium and non-equilibrium 0thermodynamic properties, it self-assembles (spontaneously or driven externally) to form a large diversity of structures, and its constituents display an interesting and complex transport behavior. In this contribution, we review the essential aspects and the modern challenges of Colloidal SoftMatter Physics. Our main goal is to provide a balanced discussion of the various facets of this highly multidisciplinary field, including experiments, theoretical approximations and models for molecular simulations, so that readers with various backgrounds could get both the basics and a broader, more detailed physical picture of the field. To this end, we first put emphasis on the colloidal physics, which allows us to understand the main driving (molecular and thermodynamic) forces between colloids that give rise to a wide range of physical phenomena. We also draw attention to some particular problems and areas of opportunity in Colloidal Soft Matter Physics that represent promising perspectives for future investigations.

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Section: Directed Self-assembly and Anomalous Transport Of Colloidsmentioning

confidence: 99%

Colloidal Soft Matter Physics

Castañeda-Priego

2021

Rev. Mex. Fís.

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“…As summarised in the previous sections, during the last decade, the influence of interactions on SFD of colloidal suspensions has been studied extensively 36,37,[41][42][43][44][47][48][49][50][51]54,71,73,114,115,[136][137][138][139][140][141][142][143][144][145][146] . In particular, recent experiments with charged macroscopic particles (millimetric steel balls) confined in circular channels 114 or linear channels of finite length 44,115 exhibited particle diffusion slower than the scaling.…”

Section: Clusteringmentioning

confidence: 99%

Single file dynamics in soft materials

Taloni

Flomenbom²,

Castañeda-Priego

et al. 2017

Soft Matter

Self Cite

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The term single file (SF) dynamics refers to the motion of an assembly of particles through a channel with cross-sections comparable to the particles' diameter. Single file diffusion (SFD) is then the diffusion of a tagged particle in a single file, i.e., under the condition that particle passing is not allowed. SFD accounts for a large variety of processes in nature, including diffusion of colloids in synthetic and natural channels, biological motors along molecular chains, electrons in proteins and liquid helium, ions through membranes, just to mention a few examples. Albeit introduced in 1965s, over the last decade the classical notion of SF dynamics has been generalised to account for a more realistic modelling of the particle properties, file geometry, particle-particle and channel-particle interactions, which paves the way to remarkable applications of the SF model, for instance, in the technology of bio-integrated nanodevices. We provide here a comprehensive review of the recent advances in the theory of SF dynamics with the purpose of spurring further experimental work.

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Structural transitions and long-time self-diffusion of interacting colloids confined by a parabolic potential

Euán-Díaz

Herrera-Velarde

Peeters

et al. 2015

The Journal of Chemical Physics

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We report on the ordering and dynamics of interacting colloidal particles confined by a parabolic potential. By means of Brownian dynamics simulations, we find that by varying the magnitude of the trap stiffness, it is possible to control the dimension of the system and, thus, explore both the structural transitions and the long-time self-diffusion coefficient as a function of the degree of confinement. We particularly study the structural ordering in the directions perpendicular and parallel to the confinement. Further analysis of the local distribution of the first-neighbors layer allows us to identify the different structural phases induced by the parabolic potential. These results are summarized in a structural state diagram that describes the way in which the colloidal suspension undergoes a structural re-ordering while increasing the confinement. To fully understand the particle dynamics, we take into account hydrodynamic interactions between colloids; the parabolic potential constricts the available space for the colloids, but it does not act on the solvent. Our findings show a non-linear behavior of the long-time self-diffusion coefficient that is associated to the structural transitions induced by the external field.

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Single-File Diffusion of Driven Interacting Colloids

Cited by 5 publications

References 45 publications

Colloidal Soft Matter Physics

Colloidal Soft Matter Physics

Single file dynamics in soft materials

Structural transitions and long-time self-diffusion of interacting colloids confined by a parabolic potential

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