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Title: Direct visualization of the hydration layer on alumina nanoparticles with the fluid cell STEM in situ

Abstract

Rheological behavior of aqueous suspensions containing nanometer-sized powders is of relevance to many branches of industry. Unusually high viscosities observed for suspensions of nanoparticles compared to those of micron size powders cannot be explained by current viscosity models. Formation of so-called hydration layer on alumina nanoparticles in water was hypothesized, but never observed experimentally. We report here on the direct visualization of aqueous suspensions of alumina with the fluid cell in situ. We observe the hydration layer formed over the particle aggregates and show that such hydrated aggregates constitute new particle assemblies and affect the flow behavior of the suspensions. We discuss how these hydrated nanoclusters alter the effective solid content and the viscosity of nanostructured suspensions. As a result, our findings elucidate the source of high viscosity observed for nanoparticle suspensions and are of direct relevance to many industrial sectors including materials, food, cosmetics, pharmaceutical among others employing colloidal slurries with nanometer-scale particles.

Authors:
 [1];  [2];  [1];  [3];  [1]
  1. Ames Lab., Ames, IA (United States)
  2. Iowa State Univ., Ames, IA (United States)
  3. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1225384
Report Number(s):
IS-J-8517
Journal ID: ISSN 2045-2322; srep09830
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal Issue: 2; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; alumina nanoparticles; aqueous suspensions; effective particle size; hydration layer; viscosity; in situ STEM analysis

Citation Formats

Firlar, Emre, Çınar, Simge, Kashyap, Sanjay, Akinc, Mufit, and Prozorov, Tanya. Direct visualization of the hydration layer on alumina nanoparticles with the fluid cell STEM in situ. United States: N. p., 2015. Web. doi:10.1038/srep09830.
Firlar, Emre, Çınar, Simge, Kashyap, Sanjay, Akinc, Mufit, & Prozorov, Tanya. Direct visualization of the hydration layer on alumina nanoparticles with the fluid cell STEM in situ. United States. https://doi.org/10.1038/srep09830
Firlar, Emre, Çınar, Simge, Kashyap, Sanjay, Akinc, Mufit, and Prozorov, Tanya. 2015. "Direct visualization of the hydration layer on alumina nanoparticles with the fluid cell STEM in situ". United States. https://doi.org/10.1038/srep09830. https://www.osti.gov/servlets/purl/1225384.
@article{osti_1225384,
title = {Direct visualization of the hydration layer on alumina nanoparticles with the fluid cell STEM in situ},
author = {Firlar, Emre and Çınar, Simge and Kashyap, Sanjay and Akinc, Mufit and Prozorov, Tanya},
abstractNote = {Rheological behavior of aqueous suspensions containing nanometer-sized powders is of relevance to many branches of industry. Unusually high viscosities observed for suspensions of nanoparticles compared to those of micron size powders cannot be explained by current viscosity models. Formation of so-called hydration layer on alumina nanoparticles in water was hypothesized, but never observed experimentally. We report here on the direct visualization of aqueous suspensions of alumina with the fluid cell in situ. We observe the hydration layer formed over the particle aggregates and show that such hydrated aggregates constitute new particle assemblies and affect the flow behavior of the suspensions. We discuss how these hydrated nanoclusters alter the effective solid content and the viscosity of nanostructured suspensions. As a result, our findings elucidate the source of high viscosity observed for nanoparticle suspensions and are of direct relevance to many industrial sectors including materials, food, cosmetics, pharmaceutical among others employing colloidal slurries with nanometer-scale particles.},
doi = {10.1038/srep09830},
url = {https://www.osti.gov/biblio/1225384}, journal = {Scientific Reports},
issn = {2045-2322},
number = 2,
volume = 5,
place = {United States},
year = {Thu May 21 00:00:00 EDT 2015},
month = {Thu May 21 00:00:00 EDT 2015}
}

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Cited by: 15 works
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Works referenced in this record:

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