Dynamics of a suspension of interacting yolk-shell particles

Sánchez Díaz, L. E.; Cortes-Morales, E. C.; Li, X.; Chen, Wei-Ren; Medina-Noyola, M.

doi:10.1209/0295-5075/108/68007

Title: Dynamics of a suspension of interacting yolk-shell particles

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Abstract

In this work we study the self-diusion properties of a liquid of hollow spherical particles (shells) bearing a smaller solid sphere in their interior (yolks). We model this system using purely repulsive hard-body interactions between all (shell and yolk) particles, but assume the presence of a background ideal solvent such that all the particles execute free Brownian motion between collisions, characterized by short-time self-diusion coecients D0 s for the shells and D0 y for the yolks. Using a softened version of these interparticle potentials we perform Brownian dynamics simulations to determine the mean squared displacement and intermediate scattering function of the yolk-shell complex. These results can be understood in terms of a set of eective Langevin equations for the N interacting shell particles, pre-averaged over the yolks' degrees of freedom, from which an approximate self-consistent description of the simulated self-diusion properties can be derived. Here we compare the theoretical and simulated results between them, and with the results for the same system in the absence of yolks. We nd that the yolks, which have no eect on the shell-shell static structure, in uence the dynamic properties in a predictable manner, fully captured by the theory.

Authors:

Sánchez Díaz, L. E. ^[1]; Cortes-Morales, E. C. ^[2]; Li, X. ^[1]; Chen, Wei-Ren ^[1]; Medina-Noyola, M. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biology and Soft Matter Div.
Univ. Autonoma de San Luis Potosi Alvaro Obregon (Mexico). Inst. de Fisica Manuel Sandoval Vallarta

Publication Date:: Mon Dec 01 00:00:00 EST 2014

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1185832

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Europhysics Letters

Additional Journal Information:: Journal Volume: 108; Journal Issue: 6; Journal ID: ISSN 0295-5075

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats


                    Sánchez Díaz, L. E., Cortes-Morales, E. C., Li, X., Chen, Wei-Ren, and Medina-Noyola, M. Dynamics of a suspension of interacting yolk-shell particles.  United States: N. p., 2014. 
Web.  doi:10.1209/0295-5075/108/68007.

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                    Sánchez Díaz, L. E., Cortes-Morales, E. C., Li, X., Chen, Wei-Ren, & Medina-Noyola, M. Dynamics of a suspension of interacting yolk-shell particles.  United States.  https://doi.org/10.1209/0295-5075/108/68007

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                    Sánchez Díaz, L. E., Cortes-Morales, E. C., Li, X., Chen, Wei-Ren, and Medina-Noyola, M. Mon .  
"Dynamics of a suspension of interacting yolk-shell particles".  United States.  https://doi.org/10.1209/0295-5075/108/68007.  https://www.osti.gov/servlets/purl/1185832.

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@article{osti_1185832,

  title        = {Dynamics of a suspension of interacting yolk-shell particles},

  author       = {Sánchez Díaz, L. E. and Cortes-Morales, E. C. and Li, X. and Chen, Wei-Ren and Medina-Noyola, M.},

  abstractNote = {In this work we study the self-diusion properties of a liquid of hollow spherical particles (shells) bearing a smaller solid sphere in their interior (yolks). We model this system using purely repulsive hard-body interactions between all (shell and yolk) particles, but assume the presence of a background ideal solvent such that all the particles execute free Brownian motion between collisions, characterized by short-time self-diusion coecients D0 s for the shells and D0 y for the yolks. Using a softened version of these interparticle potentials we perform Brownian dynamics simulations to determine the mean squared displacement and intermediate scattering function of the yolk-shell complex. These results can be understood in terms of a set of eective Langevin equations for the N interacting shell particles, pre-averaged over the yolks' degrees of freedom, from which an approximate self-consistent description of the simulated self-diusion properties can be derived. Here we compare the theoretical and simulated results between them, and with the results for the same system in the absence of yolks. We nd that the yolks, which have no eect on the shell-shell static structure, in uence the dynamic properties in a predictable manner, fully captured by the theory.},

  doi          = {10.1209/0295-5075/108/68007},

  journal      = {Europhysics Letters},

  number       = 6,

  volume       = 108,

  place        = {United States},

  year         = {Mon Dec 01 00:00:00 EST 2014},

  month        = {Mon Dec 01 00:00:00 EST 2014}

}

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