Analyzing a fractal gel of charged oblate nanoparticles in a suspension using time-resolved rheometry and DLVO theory

Faraday Discussions
Shweta Jatav, Yogesh M Joshi

Abstract

The disk-like nanoparticles of LAPONITE® are known to self-assemble to form a fractal gel within hours after a sufficiently large concentration of LAPONITE® is dispersed in water containing salt. The concentration of sodium counterions associated with LAPONITE® particles, however, continues to increase over a period of days, suggesting that delamination of LAPONITE® disks from stacks is sluggish and/or dissociation of counterions is slow. In either case, spontaneous self-assembly of LAPONITE® particles occurs even though delamination and/or counterion dissociation has not reached its equilibrium state. In order to determine the nature of the fractal gel as the extent of delamination and/or dissociation progresses towards equilibrium, we subject the LAPONITE® suspension to a freezing-defrosting cycle, which interestingly reinitiates the gelation process in suspension afresh. Application of time-resolved rheometry to a defrosted suspension shows that iso-frequency loss tangent curves intersect at an identical point, validating the Winter-Chambon criterion for a critical fractal gel state. Interestingly, while the time required to form a critical gel is observed to decrease with increased time elapsed since preparation, at which f...Continue Reading

References

Nov 1, 1993·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·R H ColbyM Rubinstein
Jan 6, 2004·Chemical Communications : Chem Comm·Sadok Letaief, Eduardo Ruiz-Hitzky
Dec 17, 2004·Physical Review Letters·R BandyopadhyayR L Leheny
Feb 22, 2005·Journal of Colloid and Interface Science·Philippe MongondryTaco Nicolai
Mar 24, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Hajime TanakaDaniel Bonn
Aug 11, 2005·Physical Review Letters·S ManleyD A Weitz
Oct 26, 2005·Journal of Colloid and Interface Science·Peter B Laxton, John C Berg
Sep 4, 2007·The Journal of Chemical Physics·Yogesh M Joshi
Mar 21, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·B RuzickaG Ruocco
Mar 5, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·S Jabbari-FaroujiDaniel Bonn
May 2, 2009·Journal of the American Chemical Society·Kunshan SunSrinivasa R Raghavan
Aug 8, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ajay Singh Negi, Chinedum O Osuji
Jan 27, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·A Shahin, Yogesh M Joshi
Apr 7, 2010·Physical Review Letters·B RuzickaG Ruocco
Apr 23, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Kunshan Sun, Srinivasa R Raghavan
Dec 15, 2010·Nature Materials·Barbara RuzickaFrancesco Sciortino
Jan 15, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ajay Singh Negi, Chinedum O Osuji
Apr 12, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Erwan PaineauLaurent J Michot
Jul 28, 2009·Macromolecules·Kelly M SchultzEric M Furst
Mar 15, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·A Shahin, Yogesh M Joshi
Oct 13, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·A Shahin, Yogesh M Joshi
Oct 3, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Samim Ali, Ranjini Bandyopadhyay
Mar 25, 2014·Annual Review of Chemical and Biomolecular Engineering·Yogesh M Joshi
Jun 3, 2014·Nature Communications·Roberta AngeliniBarbara Ruzicka
Mar 3, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Debasish SahaYogesh M Joshi

❮ Previous
Next ❯

Citations

Jul 11, 2018·Reports on Progress in Physics·Liam CollinsBrian J Rodriguez
Feb 6, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Khushboo SumanYogesh M Joshi
Sep 6, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Khushboo Suman, Yogesh M Joshi
Dec 22, 2021·Soft Matter·Peng-Kai KaoMahesh Ganesan

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Value in Health : the Journal of the International Society for Pharmacoeconomics and Outcomes Research
T WasserD Eisenberg
Physical Review A: General Physics
L S CederbaumP Pfeifer
Advances in Colloid and Interface Science
David Voisin, Brian Vincent
© 2022 Meta ULC. All rights reserved