1
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Li H, Ladd-Parada M, Karina A, Dallari F, Reiser M, Perakis F, Striker NN, Sprung M, Westermeier F, Grübel G, Steffen W, Lehmkühler F, Amann-Winkel K. Intrinsic Dynamics of Amorphous Ice Revealed by a Heterodyne Signal in X-ray Photon Correlation Spectroscopy Experiments. J Phys Chem Lett 2023; 14:10999-11007. [PMID: 38039400 PMCID: PMC10726389 DOI: 10.1021/acs.jpclett.3c02470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/04/2023] [Accepted: 11/28/2023] [Indexed: 12/03/2023]
Abstract
Unraveling the mechanism of water's glass transition and the interconnection between amorphous ices and liquid water plays an important role in our overall understanding of water. X-ray photon correlation spectroscopy (XPCS) experiments were conducted to study the dynamics and the complex interplay between the hypothesized glass transition in high-density amorphous ice (HDA) and the subsequent transition to low-density amorphous ice (LDA). Our XPCS experiments demonstrate that a heterodyne signal appears in the correlation function. Such a signal is known to originate from the interplay of a static component and a dynamic component. Quantitative analysis was performed on this heterodyne signal to extract the intrinsic dynamics of amorphous ice during the HDA-LDA transition. An angular dependence indicates non-isotropic, heterogeneous dynamics in the sample. Using the Stokes-Einstein relation to extract diffusion coefficients, the data are consistent with the scenario of static LDA islands floating within a diffusive matrix of high-density liquid water.
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Affiliation(s)
- Hailong Li
- Max-Planck-Institute
for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Marjorie Ladd-Parada
- Department
of Physics, AlbaNova University Center, Stockholm University, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden
- Department
of Chemistry, KTH Royal Institute of Technology, Roslagstullsbacken 21, 11421 Stockholm, Sweden
| | - Aigerim Karina
- Department
of Physics, AlbaNova University Center, Stockholm University, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden
| | - Francesco Dallari
- Deutsches
Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Mario Reiser
- Department
of Physics, AlbaNova University Center, Stockholm University, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden
| | - Fivos Perakis
- Department
of Physics, AlbaNova University Center, Stockholm University, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden
| | - Nele N. Striker
- Deutsches
Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Michael Sprung
- Deutsches
Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Fabian Westermeier
- Deutsches
Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Gerhard Grübel
- Deutsches
Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Hamburg
Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
- European
X-ray Free-Electron Laser, Holzkoppel 4, 22869 Schenefeld, Germany
| | - Werner Steffen
- Max-Planck-Institute
for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Felix Lehmkühler
- Deutsches
Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Hamburg
Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Katrin Amann-Winkel
- Max-Planck-Institute
for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Department
of Physics, AlbaNova University Center, Stockholm University, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden
- Institute
of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55128 Mainz, Germany
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2
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Xu Y, Mason TG. Jamming and depletion in extremely bidisperse mixtures of microscale emulsions and nanoemulsions. SCIENCE ADVANCES 2023; 9:eadh3715. [PMID: 37379378 DOI: 10.1126/sciadv.adh3715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/25/2023] [Indexed: 06/30/2023]
Abstract
While much attention has been given to jamming of granular and colloidal particles having monomodal size distributions, jamming of systems having more complex size distributions remains an interesting direction. We create concentrated, disordered binary mixtures of size-fractionated nanoscale and microscale oil-in-water emulsions, which are stabilized by the same common ionic surfactant, and measure the optical transport properties, microscale droplet dynamics, and mechanical shear rheological properties of these mixtures over a wide range of relative and total droplet volume fractions. Simple effective medium theories do not explain all of our observations. Instead, we show that our measurements are consistent with more complex collective behavior in extremely bidisperse systems, involving an effective continuous phase that governs nanodroplet jamming, as well as depletion attractions between microscale droplets induced by nanoscale droplets.
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Affiliation(s)
- Yixuan Xu
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Thomas G Mason
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, CA 90095, USA
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3
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Jiang Y, Seto R. Colloidal gelation with non-sticky particles. Nat Commun 2023; 14:2773. [PMID: 37188701 DOI: 10.1038/s41467-023-38461-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 04/26/2023] [Indexed: 05/17/2023] Open
Abstract
Colloidal gels are widely applied in industry due to their rheological character-no flow takes place below the yield stress. Such property enables gels to maintain uniform distribution in practical formulations; otherwise, solid components may quickly sediment without the support of gel matrix. Compared with pure gels of sticky colloids, therefore, the composites of gel and non-sticky inclusions are more commonly encountered in reality. Through numerical simulations, we investigate the gelation process in such binary composites. We find that the non-sticky particles not only confine gelation in the form of an effective volume fraction, but also introduce another lengthscale that competes with the size of growing clusters in gel. The ratio of two key lengthscales in general controls the two effects. Using different gel models, we verify such a scenario within a wide range of parameter space, suggesting a potential universality in all classes of colloidal composites.
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Affiliation(s)
- Yujie Jiang
- Wenzhou Key Laboratory of Biomaterials and Engineering, Wenzhou Institute, University of Chinese Academy of Sciences, 325000, Wenzhou, Zhejiang, China.
- School of Physical Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China.
| | - Ryohei Seto
- Wenzhou Key Laboratory of Biomaterials and Engineering, Wenzhou Institute, University of Chinese Academy of Sciences, 325000, Wenzhou, Zhejiang, China.
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), 325000, Wenzhou, Zhejiang, China.
- Graduate School of Information Science, University of Hyogo, 650-0047, Kobe, Hyogo, Japan.
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4
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Slim AH, Shi WH, Safi Samghabadi F, Faraone A, Marciel AB, Poling-Skutvik R, Conrad JC. Electrostatic Repulsion Slows Relaxations of Polyelectrolytes in Semidilute Solutions. ACS Macro Lett 2022; 11:854-860. [PMID: 35758769 DOI: 10.1021/acsmacrolett.2c00213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigate the structure and dynamics of unentangled semidilute solutions of sodium polystyrenesulfonate (NaPSS) using small-angle neutron scattering (SANS) and neutron spin-echo (NSE) spectroscopy. The effects of electrostatic interactions and chain structure are examined as a function of ionic strength and polymer concentration, respectively. The SANS profiles exhibit a characteristic structural peak, signature of polyelectrolyte solutions, that can be fit with a combination of a semiflexible chain with excluded volume interactions form factor and a polymer reference interaction site model (PRISM) structure factor. We confirm that electrostatic interactions vary with ionic strength across solutions with similar geometries. The segmental relaxations from NSE deviate from theoretical predictions from Zimm and exhibit two scaling behaviors, with the crossover between the two regimes taking place around the characteristic structural peak. The chain dynamics are suppressed across the length scale of the correlation blob, and inversely related to the structure factor. These observations suggest that the highly correlated nature of polyelectrolytes presents an additional energy barrier that leads to de Gennes narrowing behavior.
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Affiliation(s)
- Ali H Slim
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Winnie H Shi
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Farshad Safi Samghabadi
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Antonio Faraone
- National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20899, United States
| | - Amanda B Marciel
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Ryan Poling-Skutvik
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Jacinta C Conrad
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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5
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Khan F, Narayanan S, Sersted R, Schwarz N, Sandy A. Distributed X-ray photon correlation spectroscopy data reduction using Hadoop MapReduce. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:1135-1143. [PMID: 29979175 DOI: 10.1107/s160057751800601x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
Multi-speckle X-ray photon correlation spectroscopy (XPCS) is a powerful technique for characterizing the dynamic nature of complex materials over a range of time scales. XPCS has been successfully applied to study a wide range of systems. Recent developments in higher-frame-rate detectors, while aiding in the study of faster dynamical processes, creates large amounts of data that require parallel computational techniques to process in near real-time. Here, an implementation of the multi-tau and two-time autocorrelation algorithms using the Hadoop MapReduce framework for distributed computing is presented. The system scales well with regard to the increase in the data size, and has been serving the users of beamline 8-ID-I at the Advanced Photon Source for near real-time autocorrelations for the past five years.
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Affiliation(s)
- Faisal Khan
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
| | - Suresh Narayanan
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
| | - Roger Sersted
- APS Engineering Support, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
| | - Nicholas Schwarz
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
| | - Alec Sandy
- X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA
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6
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Zhang X, Lv L, Wu G, Yang D, Dong A. Cluster-mediated assembly enables step-growth copolymerization from binary nanoparticle mixtures with rationally designed architectures. Chem Sci 2018; 9:3986-3991. [PMID: 29862003 PMCID: PMC5944820 DOI: 10.1039/c8sc00220g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/01/2018] [Indexed: 01/04/2023] Open
Abstract
Multicomponent nanoparticle chains structurally analogous to random, block, and alternating copolymers, respectively, have been fabricated by a cluster-mediated self-assembly process.
Directed co-assembly of binary nanoparticles (NPs) into one-dimensional copolymer-like chains is fascinating but challenging in the realm of material science. While many strategies have been developed to induce the polymerization of NPs, it remains a grand challenge to produce colloidal copolymers with widely tailored compositions and precisely controlled architectures. Herein we report a robust colloidal polymerization strategy, which enables the growth of sophisticated NP chains with elaborately designed structures. By quantifying NP assembly statistics and kinetics, we establish that the linear assembly of colloidal NPs, with the assistance of PbSO4 clusters, follows a step-growth polymerization mechanism, and on the basis of this, we design and fabricate NP chains structurally analogous to random, block, and alternating copolymers, respectively. Our studies offer mechanistic insights into cluster-mediated colloidal polymerization, paving the way toward the rational synthesis of colloidal copolymers with quantitatively predicted architectures and functionalities.
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Affiliation(s)
- Xianfeng Zhang
- State Key Laboratory of Molecular Engineering of Polymers , Department of Macromolecular Science , Fudan University , Shanghai 200433 , China
| | - Longfei Lv
- iChem , Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Department of Chemistry , Fudan University , Shanghai 200433 , China .
| | - Guanhong Wu
- iChem , Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Department of Chemistry , Fudan University , Shanghai 200433 , China .
| | - Dong Yang
- State Key Laboratory of Molecular Engineering of Polymers , Department of Macromolecular Science , Fudan University , Shanghai 200433 , China
| | - Angang Dong
- iChem , Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Department of Chemistry , Fudan University , Shanghai 200433 , China .
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7
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Jung YS, Lee JY, Ahn KH, Lee SJ. Effect of affinity on the structure formation in highly size asymmetric bimodal suspensions. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.11.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Harden JL, Guo H, Bertrand M, Shendruk TN, Ramakrishnan S, Leheny RL. Enhanced gel formation in binary mixtures of nanocolloids with short-range attraction. J Chem Phys 2018; 148:044902. [DOI: 10.1063/1.5007038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- James L. Harden
- Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Hongyu Guo
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - Martine Bertrand
- Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Tyler N. Shendruk
- Center for Studies in Physics and Biology, The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA
| | - Subramanian Ramakrishnan
- Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, Florida 32312, USA
| | - Robert L. Leheny
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
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9
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Differential dynamic microscopy of bidisperse colloidal suspensions. NPJ Microgravity 2017; 3:21. [PMID: 28868354 PMCID: PMC5577322 DOI: 10.1038/s41526-017-0027-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 06/10/2017] [Accepted: 06/16/2017] [Indexed: 02/02/2023] Open
Abstract
Research tasks in microgravity include monitoring the dynamics of constituents of varying size and mobility in processes such as aggregation, phase separation, or self-assembly. We use differential dynamic microscopy, a method readily implemented with equipment available on the International Space Station, to simultaneously resolve the dynamics of particles of radius 50 nm and 1 μm in bidisperse aqueous suspensions. Whereas traditional dynamic light scattering fails to detect a signal from the larger particles at low concentrations, differential dynamic microscopy exhibits enhanced sensitivity in these conditions by accessing smaller wavevectors where scattering from the large particles is stronger. Interference patterns due to scattering from the large particles induce non-monotonic decay of the amplitude of the dynamic correlation function with the wavevector. We show that the position of the resulting minimum contains information on the vertical position of the particles. Together with the simple instrumental requirements, the enhanced sensitivity of differential dynamic microscopy makes it an appealing alternative to dynamic light scattering to characterize samples with complex dynamics.
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10
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Zhang F, Allen AJ, Levine LE, Tsai DH, Ilavsky J. Structure and Dynamics of Bimodal Colloidal Dispersions in a Low-Molecular-Weight Polymer Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2817-2828. [PMID: 28233496 PMCID: PMC5527685 DOI: 10.1021/acs.langmuir.7b00090] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present an experimental study of the structural and dynamical properties of bimodal, micrometer-sized colloidal dispersions (size ratio ≈ 2) in an aqueous solution of low-molecular-weight polymer (polyethylene glycol 2000) using synchrotron ultra-small angle X-ray scattering (USAXS) and USAXS-based X-ray photon correlation spectroscopy. We fixed the volume fraction of the large particles at 5% and systematically increased the volume fraction of the small particles from 0 to 5% to evaluate their effects on the structure and dynamics. The bimodal dispersions were homogenous through the investigated parameter space. We found that the partial structure factors can be satisfactorily retrieved for the bimodal colloidal dispersions using a Percus-Yevick hard-sphere potential when the size distributions of the particles were taken into account. We also found that the partial structure factor between the large particles did not exhibit a significant variation with increasing volume fraction of the small particles, whereas the isothermal compressibility of the binary mixture was found to decrease with increasing volume fraction of the small particles. The dynamics of single-component large-particle dispersion obey the principles of de Gennes narrowing, where the wave vector dependence of the interparticle diffusion coefficient is inversely proportional to the interparticle structure factor. The dynamics of the bimodal dispersions demonstrate a strong dependence on the fraction of small particles. We also made a comparison between the experimental effective dynamic viscosity of the bimodal dispersion with the theoretical predictions, which suggest that the complex mutual interactions between the large and small particles have a strong effect on the dynamic behaviors of bimodal dispersions.
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Affiliation(s)
- Fan Zhang
- Material Measurement Laboratory, National Institute of Standards and Technology Gaithersburg, MD 20899, USA
| | - Andrew J. Allen
- Material Measurement Laboratory, National Institute of Standards and Technology Gaithersburg, MD 20899, USA
| | - Lyle E. Levine
- Material Measurement Laboratory, National Institute of Standards and Technology Gaithersburg, MD 20899, USA
| | - De-Hao Tsai
- Department of Chemical Engineering, National Tsing Hua University Hsinchu, Taiwan, Republic of China
| | - Jan Ilavsky
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory Argonne, IL 60439, USA
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11
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Poling-Skutvik R, Mongcopa KIS, Faraone A, Narayanan S, Conrad JC, Krishnamoorti R. Structure and Dynamics of Interacting Nanoparticles in Semidilute Polymer Solutions. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01277] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
| | | | - Antonio Faraone
- National Institute
of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20899, United States
| | - Suresh Narayanan
- Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
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12
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Lee J, Lee SJ, Ahn KH, Lee SJ. Nanoparticle-Induced Gelation of Bimodal Slurries with Highly Size-Asymmetric Particles: Effect of Surface Chemistry and Concentration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13639-13646. [PMID: 26634946 DOI: 10.1021/acs.langmuir.5b03752] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A systematic study has been performed to investigate the effect of surface potential of nanoparticles on the rheological behavior of bimodal suspensions, using a model system consisting of polystyrene latex (primary size ∼530 nm) and alumina-coated silica (primary size ∼12 nm) particles. The surface potential of small particles was tuned by varying the solution pH, causing them to be repulsive to each other, attractive to each other, and oppositely charged to the large particles, while the large particles remained electrostatically stabilized. We found that the rheological properties could be dramatically changed from viscous to gel-like depending on the surface potential and concentration of small particles. A colloidal gel was induced by small particles when the small particles had the opposite charge to the large particles and a volume fraction of 10(-4) < ϕsmall < 10(-3), and when the small particles were attractive to each other above a critical threshold, ϕsmall > 10(-4). Cryo-SEM distinguished the gel structures to be either short bridging gels produced by oppositely charged small particles or long bridging gels or dense gels produced by attractive small particles. On the basis of this rheological behavior and microstructure, we prepared a phase diagram of highly size-asymmetric bimodal colloids with respect to the surface chemistry and concentration of small particles.
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Affiliation(s)
- Jooyoung Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University , Seoul 151-744, Korea
| | - Seong Jae Lee
- Department of Polymer Engineering, The University of Suwon , Gyeonggi 445-743, Korea
| | - Kyung Hyun Ahn
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University , Seoul 151-744, Korea
| | - Seung Jong Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University , Seoul 151-744, Korea
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13
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Malkin AY, Kulichikhin VG. Structure and rheology of highly concentrated emulsions: a modern look. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4499] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Agrawal A, Yu HY, Srivastava S, Choudhury S, Narayanan S, Archer LA. Dynamics and yielding of binary self-suspended nanoparticle fluids. SOFT MATTER 2015; 11:5224-5234. [PMID: 26053059 DOI: 10.1039/c5sm00639b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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.
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Affiliation(s)
- Akanksha Agrawal
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA.
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15
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Lee J, Lee SJ, Ahn KH, Lee SJ. Bimodal colloid gels of highly size-asymmetric particles. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:012313. [PMID: 26274168 DOI: 10.1103/physreve.92.012313] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Indexed: 06/04/2023]
Abstract
We report a type of colloidal gel, induced by a minute incremental addition of mutually attractive small particles (size ∼12 nm) to a suspension of highly charged large particles (size ∼500 nm). The gel's morphological behavior does not follow the typical power-law scaling for fractal clusters. Its unique scaling behavior has two distinct power-law indices, based on particle volume fraction. We show the unique scaling behavior arises when nonfractal networks of large particles are bridged by small-particle clusters, which occurs between a lower and upper critical boundary of small particle volume fraction.
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Affiliation(s)
- Jooyoung Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul, 151-744 Korea
| | - Seong Jae Lee
- Department of Polymer Engineering, The University of Suwon, Gyeonggi, 445-743 Korea
| | - Kyung Hyun Ahn
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul, 151-744 Korea
| | - Seung Jong Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul, 151-744 Korea
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16
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Diestra-Cruz H, Bukusoglu E, Abbott NL, Acevedo A. Hierarchical microstructures formed by bidisperse colloidal suspensions within colloid-in-liquid crystal gels. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7153-7162. [PMID: 25706308 DOI: 10.1021/am509008m] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Past studies have reported that colloids of a single size dispersed in the isotropic phase of a mesogenic solvent can form colloid-rich networks (and gels) upon thermal quenching of the system across the isotropic-nematic phase boundary of the mesogens. Herein we report the observation and characterization of complex hierarchical microstructures that form when bidisperse colloidal suspensions of nanoparticles (NPs; iron oxide with diameters of 188 ± 20 nm or poly(methyl methacrylate) with diameters of 150 ± 15 nm) and microparticles (MPs; polystyrene with diameters of 2.77 ± 0.20 μm) are dispersed in the isotropic phase of 4-pentyl-4'-cyanobiphenyl (5CB) and thermally quenched. Specifically, we document microstructuring that results from three sequential phase separation processes that occur at distinct temperatures during stepwise cooling of the ternary mixture from its miscibility region. The first phase transition demixes the system into coexisting MP-rich and NP-rich phases; the second promotes formation of a particle network within the MP-rich phase; and the third, which coincides with the isotropic-to-nematic phase transition of 5CB, produces a second colloidal network within the NP-rich phase. We quantified the dynamics of each demixing process by using optical microscopy and Fourier transform image analysis to establish that the phase transitions occur through (i) surface-directed spinodal decomposition, (ii) spinodal decomposition, and (iii) nucleation and growth, respectively. Significantly, the observed series of phase transitions leads to a hierarchical organization of cellular microstructures not observed in colloid-in-liquid crystal gels formed from monodisperse colloids. The results of this study suggest new routes to the synthesis of colloidal materials with hierarchical microstructures that combine large surface areas and organized porosity with potential applications in catalysis, separations, chemical sensing, or tissue engineering.
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Affiliation(s)
- Heberth Diestra-Cruz
- †Department of Chemical Engineering, University of Puerto Rico-Mayagüez, Mayagüez 00681, Puerto Rico
| | - Emre Bukusoglu
- ‡Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Nicholas L Abbott
- ‡Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Aldo Acevedo
- †Department of Chemical Engineering, University of Puerto Rico-Mayagüez, Mayagüez 00681, Puerto Rico
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17
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Passow C, Fischer B, Sprung M, Köckerling M, Wagner J. Direction-dependent freezing of diamagnetic colloidal tracers suspended in paramagnetic ionic liquids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7283-7288. [PMID: 24940991 DOI: 10.1021/la500658x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The dynamic behavior of an inverse ferrofluid consisting of diamagnetic, spherical silica particles suspended in the paramagnetic ionic liquid (EMIm)2[Co(NCS)4] is investigated by means of x-ray photon correlation spectroscopy in the presence of an external magnetic field. Dipole-dipole interactions between the diamagnetic holes in the paramagnetic continuum of the suspending medium induce a direction-dependence of the diffusive motion of the colloidal particles: due to a magnetic repulsion perpendicular to the direction of an external field the diffusive motion of the colloidal particles is selectively frozen in this direction.
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Affiliation(s)
- Christopher Passow
- Institut für Chemie, Universität Rostock , Albert-Einstein-Straße 3a, 18059 Rostock, Germany
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Fantoni R, Santos A. Depletion force in the infinite-dilution limit in a solvent of nonadditive hard spheres. J Chem Phys 2014; 140:244513. [DOI: 10.1063/1.4884353] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Riccardo Fantoni
- Dipartimento di Scienze dei Materiali e Nanosistemi, Università Ca’ Foscari Venezia, Calle Larga S. Marta DD2137, I-30123 Venezia, Italy
| | - Andrés Santos
- Departamento de Física and Instituto de Computación Científica Avanzada de Extremadura (ICCAEx), Universidad de Extremadura, Badajoz E-06071, Spain
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Wagner J, Märkert C, Fischer B, Müller L. Direction dependent diffusion of aligned magnetic rods by means of x-ray photon correlation spectroscopy. PHYSICAL REVIEW LETTERS 2013; 110:048301. [PMID: 25166207 DOI: 10.1103/physrevlett.110.048301] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Indexed: 06/03/2023]
Abstract
Rodlike hematite particles in suspension align perpendicular to an external magnetic field due to a negative anisotropy of their magnetic susceptibility Δχ. The diffusion tensor consists of two principal constants D(∥) and D(⊥) for the diffusion parallel and perpendicular to the long particle axis. X-ray photon correlation spectroscopy is capable of probing the diffusive motion in optically opaque suspensions of rodlike hematite particles parallel to the direction of the scattering vector Q. Choosing Q parallel or perpendicular to the direction of an external magnetic field H the direction dependent intermediate scattering function is measured by means of x-ray photon correlation spectroscopy. From the intermediate scattering function in both directions the principal diffusion constants D(∥) and D(⊥) are determined. The ratio D(∥)/D(⊥) increases with increasing aspect ratio of the particles and can be described via a rescaled theoretical approach for prolate ellipsoids of revolution.
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Affiliation(s)
- Joachim Wagner
- Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 3a, 18059 Rostock, Germany
| | - Christian Märkert
- Physikalische Chemie, Universität des Saarlandes, Campus B22, 66123 Saarbrücken, Germany
| | - Birgit Fischer
- Deutsches Elektronensynchrotron, Notkestraße 85, 22607 Hamburg, Germany
| | - Leonard Müller
- Deutsches Elektronensynchrotron, Notkestraße 85, 22607 Hamburg, Germany
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Burghardt WR, Sikorski M, Sandy AR, Narayanan S. X-ray photon correlation spectroscopy during homogenous shear flow. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 85:021402. [PMID: 22463207 DOI: 10.1103/physreve.85.021402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Indexed: 05/31/2023]
Abstract
We report x-ray photon correlation spectroscopy measurements of advective and diffusive dynamics in a dispersion of colloidal particles subjected to homogeneous shear flow in a rotating-disk shear cell. Intensity autocorrelation functions from scattering data collected using homodyne detection respond to the variation in velocity across the scattering volume when the scattering vector has a component parallel to the flow direction. Theoretical expressions for the impact of homogenous shear flow on the correlation function provide a quantitative prediction of the dependence of correlation functions on the scattering vector and shear rate. Under most circumstances, the applied shear deformation dominates the decay of the intensity correlation function. When scattering data are collected perpendicular to the flow direction, it is possible to measure the diffusive dynamics of the particles free from effects of the superimposed shear flow; however, this approach only works below some upper shear rate limit, beyond which data are affected either by shear effects (caused by the finite width of the detector) or by particle transit through the scattering volume.
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Affiliation(s)
- Wesley R Burghardt
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA.
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