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Title: Dynamics and yielding of binary self-suspended nanoparticle fluids

Abstract

Yielding and flow transitions in bi-disperse suspensions of particles are studied using a model system comprised of self-suspended spherical nanoparticles. An important feature of the materials is that the nanoparticles are uniformly dispersed in the absence of a solvent. Addition of larger particles to a suspension of smaller ones is found to soften the suspensions, and in the limit of large size disparities, completely fluidizes the material. We show that these behaviors coincide with a speeding-up of de-correlation dynamics of all particles in the suspensions and are accompanied by a reduction in the energy dissipated at the yielding transition. We discuss our findings in terms of ligand-mediated jamming and un-jamming of hairy particle suspensions.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); King Abdullah University of Science and Technology - Supercomputing Laboratory; USDOE Office of Science (SC)
OSTI Identifier:
1240281
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Soft Matter; Journal Volume: 11
Country of Publication:
United States
Language:
English

Citation Formats

Agrawal, Akanksha, Yu, Hsiu-Yu, Srivastava, Samanvaya, Choudhury, Snehashis, Narayanan, Suresh, and Archer, Lynden A. Dynamics and yielding of binary self-suspended nanoparticle fluids. United States: N. p., 2015. Web. doi:10.1039/c5sm00639b.
Agrawal, Akanksha, Yu, Hsiu-Yu, Srivastava, Samanvaya, Choudhury, Snehashis, Narayanan, Suresh, & Archer, Lynden A. Dynamics and yielding of binary self-suspended nanoparticle fluids. United States. doi:10.1039/c5sm00639b.
Agrawal, Akanksha, Yu, Hsiu-Yu, Srivastava, Samanvaya, Choudhury, Snehashis, Narayanan, Suresh, and Archer, Lynden A. Thu . "Dynamics and yielding of binary self-suspended nanoparticle fluids". United States. doi:10.1039/c5sm00639b.
@article{osti_1240281,
title = {Dynamics and yielding of binary self-suspended nanoparticle fluids},
author = {Agrawal, Akanksha and Yu, Hsiu-Yu and Srivastava, Samanvaya and Choudhury, Snehashis and Narayanan, Suresh and Archer, Lynden A.},
abstractNote = {Yielding and flow transitions in bi-disperse suspensions of particles are studied using a model system comprised of self-suspended spherical nanoparticles. An important feature of the materials is that the nanoparticles are uniformly dispersed in the absence of a solvent. Addition of larger particles to a suspension of smaller ones is found to soften the suspensions, and in the limit of large size disparities, completely fluidizes the material. We show that these behaviors coincide with a speeding-up of de-correlation dynamics of all particles in the suspensions and are accompanied by a reduction in the energy dissipated at the yielding transition. We discuss our findings in terms of ligand-mediated jamming and un-jamming of hairy particle suspensions.},
doi = {10.1039/c5sm00639b},
journal = {Soft Matter},
number = ,
volume = 11,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}