1
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Kamal MA, Brizioli M, Zinn T, Narayanan T, Cerbino R, Giavazzi F, Pal A. Dynamics of anisotropic colloidal systems: What to choose, DLS, DDM or XPCS? J Colloid Interface Sci 2024; 660:314-320. [PMID: 38244498 DOI: 10.1016/j.jcis.2023.12.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/11/2023] [Accepted: 12/28/2023] [Indexed: 01/22/2024]
Abstract
Investigation of the dynamics of colloids in bulk can be hindered by issues such as multiple scattering and sample opacity. These challenges are exacerbated when dealing with inorganic materials. In this study, we employed a model system of Akaganeite colloidal rods to assess three leading dynamics measurement techniques: 3D-(depolarized) dynamic light scattering (3D-(D)DLS), polarized-differential dynamic microscopy (P-DDM), and x-ray photon correlation spectroscopy (XPCS). Our analysis revealed that the translational and rotational diffusion coefficients captured by these methods show a remarkable alignment. Additionally, by examining the q-ranges and maximum volume fractions for each approach, we offer insights into the best technique for investigating the dynamics of anisotropic systems at the colloidal scale.
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Affiliation(s)
- Md Arif Kamal
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
| | - Matteo Brizioli
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Thomas Zinn
- ESRF-The European Synchrotron, Grenoble, France
| | | | | | - Fabio Giavazzi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Antara Pal
- Department of Physics, Stockholm University, Stockholm, Sweden; MAX IV Laboratory, Lund, Sweden.
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2
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Kurzthaler C, Zhao Y, Zhou N, Schwarz-Linek J, Devailly C, Arlt J, Huang JD, Poon WCK, Franosch T, Tailleur J, Martinez VA. Characterization and Control of the Run-and-Tumble Dynamics of Escherichia Coli. PHYSICAL REVIEW LETTERS 2024; 132:038302. [PMID: 38307047 DOI: 10.1103/physrevlett.132.038302] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 11/29/2023] [Accepted: 12/01/2023] [Indexed: 02/04/2024]
Abstract
We characterize the full spatiotemporal gait of populations of swimming Escherichia coli using renewal processes to analyze the measurements of intermediate scattering functions. This allows us to demonstrate quantitatively how the persistence length of an engineered strain can be controlled by a chemical inducer and to report a controlled transition from perpetual tumbling to smooth swimming. For wild-type E. coli, we measure simultaneously the microscopic motility parameters and the large-scale effective diffusivity, hence quantitatively bridging for the first time small-scale directed swimming and macroscopic diffusion.
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Affiliation(s)
- Christina Kurzthaler
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
- Center for Systems Biology Dresden, 01307 Dresden, Germany
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria
| | - Yongfeng Zhao
- Center for Soft Condensed Matter Physics and Interdisciplinary Research and School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, University of Hong Kong, Pok Fu Lam, Hong Kong, China
- Université de Paris, MSC, UMR 7057 CNRS, 75205 Paris, France
- School of Physics and Astronomy and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Nan Zhou
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China
| | - Jana Schwarz-Linek
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Clemence Devailly
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Jochen Arlt
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Jian-Dong Huang
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, University of Hong Kong, Pok Fu Lam, Hong Kong, China
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Wilson C K Poon
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Thomas Franosch
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria
| | - Julien Tailleur
- Université de Paris, MSC, UMR 7057 CNRS, 75205 Paris, France
| | - Vincent A Martinez
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
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3
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Zhao Y, Kurzthaler C, Zhou N, Schwarz-Linek J, Devailly C, Arlt J, Huang JD, Poon WCK, Franosch T, Martinez VA, Tailleur J. Quantitative characterization of run-and-tumble statistics in bulk bacterial suspensions. Phys Rev E 2024; 109:014612. [PMID: 38366485 DOI: 10.1103/physreve.109.014612] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 12/04/2023] [Indexed: 02/18/2024]
Abstract
We introduce a numerical method to extract the parameters of run-and-tumble dynamics from experimental measurements of the intermediate scattering function. We show that proceeding in Laplace space is unpractical and employ instead renewal processes to work directly in real time. We first validate our approach against data produced using agent-based simulations. This allows us to identify the length and time scales required for an accurate measurement of the motility parameters, including tumbling frequency and swim speed. We compare different models for the run-and-tumble dynamics by accounting for speed variability at the single-cell and population level, respectively. Finally, we apply our approach to experimental data on wild-type Escherichia coli obtained using differential dynamic microscopy.
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Affiliation(s)
- Yongfeng Zhao
- Center for Soft Condensed Matter Physics and Interdisciplinary Research & School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- School of Physics and Astronomy and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, University of Hong Kong, Pok Fu Lam, Hong Kong, People's Republic of China
- Université de Paris, MSC, UMR 7057 CNRS, 75205 Paris, France
| | - Christina Kurzthaler
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
- Center for Systems Biology Dresden, 01307 Dresden, Germany
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria
| | - Nan Zhou
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China
| | - Jana Schwarz-Linek
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Clemence Devailly
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Jochen Arlt
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Jian-Dong Huang
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, University of Hong Kong, Pok Fu Lam, Hong Kong, People's Republic of China
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Wilson C K Poon
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Thomas Franosch
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria
| | - Vincent A Martinez
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Julien Tailleur
- Université de Paris, MSC, UMR 7057 CNRS, 75205 Paris, France
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4
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Bradley JJ, Martinez VA, Arlt J, Royer JR, Poon WCK. Sizing multimodal suspensions with differential dynamic microscopy. SOFT MATTER 2023; 19:8179-8192. [PMID: 37850499 PMCID: PMC10619199 DOI: 10.1039/d3sm00593c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 10/10/2023] [Indexed: 10/19/2023]
Abstract
Differential dynamic microscopy (DDM) can be used to extract the mean particle size from videos of suspensions. However, many suspensions have multimodal particle size distributions, for which a single 'mean' is not a sufficient description. After clarifying how different particle sizes contribute to the signal in DDM, we show that standard DDM analysis can extract the mean sizes of two populations in a bimodal suspension given prior knowledge of the sample's bimodality. Further, the use of the CONTIN algorithm obviates the need for such prior knowledge. Finally, we show that by selectively analysing portions of the DDM images, we can size a trimodal suspension where the large particles would otherwise dominate the signal, again without prior knowledge of the trimodality.
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Affiliation(s)
- Joe J Bradley
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.
| | - Vincent A Martinez
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.
| | - Jochen Arlt
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.
| | - John R Royer
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.
| | - Wilson C K Poon
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.
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5
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Wu W, Knoll MSG, Giraudet C, Heinrich Rausch M, Fröba AP. Heterodyne dynamic light scattering for the characterization of particle dispersions. APPLIED OPTICS 2023; 62:8007-8017. [PMID: 38038095 DOI: 10.1364/ao.502659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 09/22/2023] [Indexed: 12/02/2023]
Abstract
Particle self-diffusivities in unimodal and bimodal aqueous dispersions are characterized by dynamic light scattering (DLS) applying a heterodyne detection scheme. For unimodal dispersions close to infinite dilution, it could be evidenced that pure homodyne conditions cannot be realized, leading to an increasing underestimation of diffusivity with a decreasing concentration. Even for bimodal dispersions and neglecting any local oscillator field, the coherent superposition of scattered light from different particle species hinders a clear assignment of the measured signals and their evaluation for diffusivity. In this case, the impact of a cross term on the determined diffusivities cannot be neglected. The results emphasize that the use of a heterodyne detection scheme in DLS experiments is a key aspect for an accurate determination of particle diffusivities in low-concentrated unimodal and bimodal dispersions.
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6
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Molaei M, Redford SA, Chou WH, Scheff D, de Pablo JJ, Oakes PW, Gardel ML. Measuring response functions of active materials from data. Proc Natl Acad Sci U S A 2023; 120:e2305283120. [PMID: 37819979 PMCID: PMC10589671 DOI: 10.1073/pnas.2305283120] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/08/2023] [Indexed: 10/13/2023] Open
Abstract
From flocks of birds to biomolecular assemblies, systems in which many individual components independently consume energy to perform mechanical work exhibit a wide array of striking behaviors. Methods to quantify the dynamics of these so-called active systems generally aim to extract important length or time scales from experimental fields. Because such methods focus on extracting scalar values, they do not wring maximal information from experimental data. We introduce a method to overcome these limitations. We extend the framework of correlation functions by taking into account the internal headings of displacement fields. The functions we construct represent the material response to specific types of active perturbation within the system. Utilizing these response functions we query the material response of disparate active systems composed of actin filaments and myosin motors, from model fluids to living cells. We show we can extract critical length scales from the turbulent flows of an active nematic, anticipate contractility in an active gel, distinguish viscous from viscoelastic dissipation, and even differentiate modes of contractility in living cells. These examples underscore the vast utility of this method which measures response functions from experimental observations of complex active systems.
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Affiliation(s)
- Mehdi Molaei
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL60637
- James Franck Institute, University of Chicago, Chicago, IL60637
- Institute for Biophysical Dynamics, University of Chicago, Chicago, IL60637
| | - Steven A. Redford
- James Franck Institute, University of Chicago, Chicago, IL60637
- Institute for Biophysical Dynamics, University of Chicago, Chicago, IL60637
- Graduate Program in Biophysical Sciences, University of Chicago, Chicago, IL60637
| | - Wen-Hung Chou
- James Franck Institute, University of Chicago, Chicago, IL60637
- Institute for Biophysical Dynamics, University of Chicago, Chicago, IL60637
- Graduate Program in Biophysical Sciences, University of Chicago, Chicago, IL60637
| | - Danielle Scheff
- James Franck Institute, University of Chicago, Chicago, IL60637
- Institute for Biophysical Dynamics, University of Chicago, Chicago, IL60637
- Department of Physics, University of Chicago, Chicago, IL60637
| | - Juan J. de Pablo
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL60637
| | - Patrick W. Oakes
- Department of Cell and Molecular Physiology, Stritch School of Medicine, Loyola University Chicago, Maywood, IL60153
| | - Margaret L. Gardel
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL60637
- James Franck Institute, University of Chicago, Chicago, IL60637
- Institute for Biophysical Dynamics, University of Chicago, Chicago, IL60637
- Department of Physics, University of Chicago, Chicago, IL60637
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7
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Sekiguchi K, Tanimoto M, Fujii S. Mesoscopic Characterization of the Early Stage of the Glucono-δ-Lactone-Induced Gelation of Milk via Image Analysis Techniques. Gels 2023; 9:gels9030202. [PMID: 36975651 PMCID: PMC10048486 DOI: 10.3390/gels9030202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/03/2023] [Accepted: 03/04/2023] [Indexed: 03/09/2023] Open
Abstract
We provide a method for quantifying the kinetics of gelation in milk acidified with glucono-δ-lactone (GDL) using image analysis techniques, particle image velocimetry (PIV), differential variance analysis (DVA) and differential dynamic microscopy (DDM). The gelation of the milk acidified with GDL occurs through the aggregation and subsequent coagulation of the casein micelles as the pH approaches the isoelectric point of the caseins. The gelation of the acidified milk with GDL is an important step in the production of fermented dairy products. PIV qualitatively monitors the average mobility of fat globules during gelation. The gel point estimated by PIV is in good agreement with that obtained by rheological measurement. DVA and DDM methods reveal the relaxation behavior of fat globules during gelation. These two methods make it possible to calculate microscopic viscosity. We also extracted the mean square displacement (MSD) of the fat globules, without following their movement, using the DDM method. The MSD of fat globules shifts to sub-diffusive behavior as gelation progresses. The fat globules used as probes show the change in matrix viscoelasticity caused by the gelling of the casein micelles. Image analysis and rheology can be used complementarily to study the mesoscale dynamics of the milk gel.
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Affiliation(s)
- Kento Sekiguchi
- Department of Food and Life Sciences, Toyo University, 1-1-1, Izumino, Itakura, Oratown 374-0193, Gunma, Japan
| | - Morimasa Tanimoto
- Faculty of Health and Nutrition, Department of Food Sciences, Tokyo Seiei College, 1-4-6, Shinkoiwa, Katsushika, Tokyo 124-8530, Japan
| | - Shuji Fujii
- Department of Food and Life Sciences, Toyo University, 1-1-1, Izumino, Itakura, Oratown 374-0193, Gunma, Japan
- Correspondence: ; Tel.: +81-(0)276-82-9214
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8
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Latreille PL, Rabanel JM, Le Goas M, Salimi S, Arlt J, Patten SA, Ramassamy C, Hildgen P, Martinez VA, Banquy X. In Situ Characterization of the Protein Corona of Nanoparticles In Vitro and In Vivo. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2203354. [PMID: 35901787 DOI: 10.1002/adma.202203354] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/23/2022] [Indexed: 06/15/2023]
Abstract
A new theoretical framework that enables the use of differential dynamic microscopy (DDM) in fluorescence imaging mode to quantify in situ protein adsorption onto nanoparticles (NP) while simultaneously monitoring for NP aggregation is proposed. This methodology is used to elucidate the thermodynamic and kinetic properties of the protein corona (PC) in vitro and in vivo. The results show that protein adsorption triggers particle aggregation over a wide concentration range and that the formed aggregate structures can be quantified using the proposed methodology. Protein affinity for polystyrene (PS) NPs is observed to be dependent on particle concentration. For complex protein mixtures, this methodology identifies that the PC composition changes with the dilution of serum proteins, demonstrating a Vroman effect never quantitatively assessed in situ on NPs. Finally, DDM allows monitoring of the evolution of the PC in vivo. This results show that the PC composition evolves significantly over time in zebrafish larvae, confirming the inherently dynamic nature of the PC. The performance of the developed methodology allows to obtain quantitative insights into nano-bio interactions in a vast array of physiologically relevant conditions that will serve to further improve the design of nanomedicine.
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Affiliation(s)
- Pierre-Luc Latreille
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
| | - Jean-Michel Rabanel
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
- INRS, Centre Armand Frappier Santé Biotechnologie, 531 Boul des Prairies, Laval, Québec, H7V 1B7, Canada
| | - Marine Le Goas
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
| | - Sina Salimi
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
| | - Jochen Arlt
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK
| | - Shunmoogum A Patten
- INRS, Centre Armand Frappier Santé Biotechnologie, 531 Boul des Prairies, Laval, Québec, H7V 1B7, Canada
| | - Charles Ramassamy
- INRS, Centre Armand Frappier Santé Biotechnologie, 531 Boul des Prairies, Laval, Québec, H7V 1B7, Canada
| | - Patrice Hildgen
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
| | - Vincent A Martinez
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK
| | - Xavier Banquy
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
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9
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Nixon-Luke R, Arlt J, Poon WCK, Bryant G, Martinez VA. Probing the dynamics of turbid colloidal suspensions using differential dynamic microscopy. SOFT MATTER 2022; 18:1858-1867. [PMID: 35171181 PMCID: PMC9977356 DOI: 10.1039/d1sm01598b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 01/30/2022] [Indexed: 06/14/2023]
Abstract
Few techniques can reliably measure the dynamics of colloidal suspensions or other soft materials over a wide range of turbidities. Here we systematically investigate the capability of Differential Dynamic Microscopy (DDM) to characterise particle dynamics in turbid colloidal suspensions based on brightfield optical microscopy. We measure the Intermediate Scattering Function (ISF) of polystyrene microspheres suspended in water over a range of concentrations, turbidities, and up to 4 orders of magnitude in time-scales. These DDM results are compared to data obtained from both Dynamic Light Scattering (DLS) and Two-colour Dynamic Light Scattering (TCDLS). The latter allows for suppression of multiple scattering for moderately turbid suspensions. We find that DDM can obtain reliable diffusion coefficients at up to 10 and 1000 times higher particle concentrations than TCDLS and standard DLS, respectively. Additionally, we investigate the roles of the four length-scales relevant when imaging a suspension: the sample thickness L, the imaging depth z, the imaging depth of field DoF, and the photon mean free path . More detailed experiments and analysis reveal the appearance of a short-time process as turbidity is increased, which we associate with multiple scattering events within the imaging depth of the field. The long-time process corresponds to the particle dynamics from which particle-size can be estimated in the case of non-interacting particles. Finally, we provide a simple theoretical framework, ms-DDM, for turbid samples, which accounts for multiple scattering.
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Affiliation(s)
- Reece Nixon-Luke
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia.
| | - Jochen Arlt
- SUPA, School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK.
| | - Wilson C K Poon
- SUPA, School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK.
| | - Gary Bryant
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia.
| | - Vincent A Martinez
- SUPA, School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK.
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10
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Pal A, De Filippo CA, Ito T, Kamal MA, Petukhov AV, De Michele C, Schurtenberger P. Shape Matters in Magnetic-Field-Assisted Assembly of Prolate Colloids. ACS NANO 2022; 16:2558-2568. [PMID: 35138802 PMCID: PMC8867904 DOI: 10.1021/acsnano.1c09208] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
An anisotropic colloidal shape in combination with an externally tunable interaction potential results in a plethora of self-assembled structures with potential applications toward the fabrication of smart materials. Here we present our investigation on the influence of an external magnetic field on the self-assembly of hematite-silica core-shell prolate colloids for two aspect ratios ρ = 2.9 and 3.69. Our study shows a rather counterintuitive but interesting phenomenon, where prolate colloids self-assemble into oblate liquid crystalline (LC) phases. With increasing concentration, particles with smaller ρ reveal a sequence of LC phases involving para-nematic, nematic, smectic, and oriented glass phases. The occurrence of a smectic phase for colloidal ellipsoids has been neither predicted nor reported before. Quantitative shape analysis of the particles together with extensive computer simulations indicate that in addition to ρ, a subtle deviation from the ideal ellipsoidal shape dictates the formation of this unusual sequence of field-induced structures. Particles with ρ = 2.9 exhibit a hybrid shape containing features from both spherocylinders and ellipsoids, which make their self-assembly behavior richer than that observed for either of the "pure" shapes. The shape of the particles with higher ρ matches closely with the ideal ellipsoids, as a result their phase behavior follows the one expected for a "pure" ellipsoidal shape. Using anisotropic building blocks and external fields, our study demonstrates the ramifications of the subtle changes in the particle shape on the field-directed self-assembled structures with externally tunable properties.
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Affiliation(s)
- Antara Pal
- Division
of Physical Chemistry, Department of Chemistry, Lund University, Lund SE-22100, Sweden
| | - Carlo Andrea De Filippo
- Dipartimento
di Scienze, Università degli Studi
Roma Tre, Via della Vasca
Navale, 84, 00146 Rome, Italy
| | - Thiago Ito
- Division
of Physical Chemistry, Department of Chemistry, Lund University, Lund SE-22100, Sweden
| | - Md. Arif Kamal
- Centre
Interdisciplinaire de Nanoscience de Marseille (CINaM), CNRS, Aix Marseille University, Campus de Luminy − Case 913, 13288 CEDEX 09 Marseille, France
| | - Andrei V. Petukhov
- Van’t
Hoff Laboratory for Physical and Colloid Chemistry, Utrecht University, Utrecht 3584 CH, The Netherlands
- Laboratory
of Physical Chemistry, Eindhoven University
of Technology, Eindhoven 5600 MB, The Netherlands
| | | | - Peter Schurtenberger
- Division
of Physical Chemistry, Department of Chemistry, Lund University, Lund SE-22100, Sweden
- Lund Institute
of Advanced Neutron and X-ray Science LINXS, Lund University, Lund SE-22370, Sweden
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11
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Gu M, Luo Y, He Y, Helgeson ME, Valentine MT. Uncertainty quantification and estimation in differential dynamic microscopy. Phys Rev E 2021; 104:034610. [PMID: 34654087 DOI: 10.1103/physreve.104.034610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 09/07/2021] [Indexed: 12/26/2022]
Abstract
Differential dynamic microscopy (DDM) is a form of video image analysis that combines the sensitivity of scattering and the direct visualization benefits of microscopy. DDM is broadly useful in determining dynamical properties including the intermediate scattering function for many spatiotemporally correlated systems. Despite its straightforward analysis, DDM has not been fully adopted as a routine characterization tool, largely due to computational cost and lack of algorithmic robustness. We present statistical analysis that quantifies the noise, reduces the computational order, and enhances the robustness of DDM analysis. We propagate the image noise through the Fourier analysis, which allows us to comprehensively study the bias in different estimators of model parameters, and we derive a different way to detect whether the bias is negligible. Furthermore, through use of Gaussian process regression (GPR), we find that predictive samples of the image structure function require only around 0.5%-5% of the Fourier transforms of the observed quantities. This vastly reduces computational cost, while preserving information of the quantities of interest, such as quantiles of the image scattering function, for subsequent analysis. The approach, which we call DDM with uncertainty quantification (DDM-UQ), is validated using both simulations and experiments with respect to accuracy and computational efficiency, as compared with conventional DDM and multiple particle tracking. Overall, we propose that DDM-UQ lays the foundation for important new applications of DDM, as well as to high-throughput characterization.
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Affiliation(s)
- Mengyang Gu
- Department of Statistics and Applied Probability, University of California, Santa Barbara, California 93106, USA
| | - Yimin Luo
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA.,Department of Mechanical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Yue He
- Department of Statistics and Applied Probability, University of California, Santa Barbara, California 93106, USA
| | - Matthew E Helgeson
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Megan T Valentine
- Department of Mechanical Engineering, University of California, Santa Barbara, California 93106, USA
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12
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Rotational and translational diffusion of colloidal ellipsoids in bulk and at surfaces. Colloid Polym Sci 2021. [DOI: 10.1007/s00396-021-04893-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Mayer DB, Sarmiento-Gómez E, Escobedo-Sánchez MA, Segovia-Gutiérrez JP, Kurzthaler C, Egelhaaf SU, Franosch T. Two-dimensional Brownian motion of anisotropic dimers. Phys Rev E 2021; 104:014605. [PMID: 34412330 DOI: 10.1103/physreve.104.014605] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/04/2021] [Indexed: 11/07/2022]
Abstract
We study the two-dimensional motion of colloidal dimers by single-particle tracking and compare the experimental observations obtained by bright-field microscopy to theoretical predictions for anisotropic diffusion. The comparison is based on the mean-square displacements in the laboratory and particle frame as well as generalizations of the self-intermediate scattering functions, which provide insights into the rotational dynamics of the dimer. The diffusional anisotropy leads to a measurable translational-rotational coupling that becomes most prominent by aligning the coordinate system with the initial orientation of the particles. In particular, we find a splitting of the time-dependent diffusion coefficients parallel and perpendicular to the long axis of the dimer which decays over the orientational relaxation time. Deviations of the self-intermediate scattering functions from pure exponential relaxation are small but can be resolved experimentally. The theoretical predictions and experimental results agree quantitatively.
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Affiliation(s)
- Daniel B Mayer
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 25/2, A-6020 Innsbruck, Austria
| | - Erick Sarmiento-Gómez
- Condensed Matter Physics Laboratory, Heinrich Heine University, Universitätsstraße 1, D-40225 Düsseldorf, Germany.,División de Ciencias e Ingenierias, Departamento de Ingenieria Física, Universidad de Guanajuato, León, Mexico
| | - Manuel A Escobedo-Sánchez
- Condensed Matter Physics Laboratory, Heinrich Heine University, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Juan Pablo Segovia-Gutiérrez
- Condensed Matter Physics Laboratory, Heinrich Heine University, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Christina Kurzthaler
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Stefan U Egelhaaf
- Condensed Matter Physics Laboratory, Heinrich Heine University, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Thomas Franosch
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 25/2, A-6020 Innsbruck, Austria
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14
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Giavazzi F, Pal A, Cerbino R. Probing roto-translational diffusion of small anisotropic colloidal particles with a bright-field microscope. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2021; 44:61. [PMID: 33900479 PMCID: PMC8076158 DOI: 10.1140/epje/s10189-021-00063-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/29/2021] [Indexed: 05/11/2023]
Abstract
Soft and biological materials are often composed of elementary constituents exhibiting an incessant roto-translational motion at the microscopic scale. Tracking this motion with a bright-field microscope becomes increasingly challenging when the particle size becomes smaller than the microscope resolution, a case which is frequently encountered. Here we demonstrate squared-gradient differential dynamic microscopy (SG-DDM) as a tool to successfully use bright-field microscopy to extract the roto-translational dynamics of small anisotropic colloidal particles, whose rotational motion cannot be tracked accurately in direct space. We provide analytical justification and experimental demonstration of the method by successful application to an aqueous suspension of peanut-shaped particles.
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Affiliation(s)
- Fabio Giavazzi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, via F.lli Cervi 93, 20090, Segrate, Italy.
| | - Antara Pal
- Division of Physical Chemistry Department of Chemistry, Lund University, Lund, Sweden
| | - Roberto Cerbino
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, via F.lli Cervi 93, 20090, Segrate, Italy
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090, Vienna, Austria
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15
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Richards JA, Martinez VA, Arlt J. Particle sizing for flowing colloidal suspensions using flow-differential dynamic microscopy. SOFT MATTER 2021; 17:3945-3953. [PMID: 33723562 DOI: 10.1039/d0sm02255a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Particle size is a key variable in understanding the behaviour of the particulate products that underpin much of our modern lives. Typically obtained from suspensions at rest, measuring the particle size under flowing conditions would enable advances for in-line testing during manufacture and high-throughput testing during development. However, samples are often turbid, multiply scattering light and preventing the direct use of common sizing techniques. Differential dynamic microscopy (DDM) is a powerful technique for analysing video microscopy of such samples, measuring diffusion and hence particle size without the need to resolve individual particles while free of substantial user input. However, when applying DDM to a flowing sample, diffusive dynamics are rapidly dominated by flow effects, preventing particle sizing. Here, we develop "flow-DDM", a novel analysis scheme that combines optimised imaging conditions, a drift-velocity correction and modelling of the impact of flow. Flow-DDM allows a decoupling of flow from diffusive motion that facilitates successful particle size measurements at flow speeds an order of magnitude higher than for DDM. We demonstrate the generality of the technique by applying flow-DDM to two separate microscopy methods and flow geometries.
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Affiliation(s)
- James A Richards
- SUPA and School of Physics and Astronomy, University of Edinburgh, King's Buildings, Edinburgh EH9 3FD, UK.
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16
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You R, McGorty R. Two-color differential dynamic microscopy for capturing fast dynamics. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:023702. [PMID: 33648121 DOI: 10.1063/5.0039177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/24/2021] [Indexed: 06/12/2023]
Abstract
Differential dynamic microscopy (DDM) is increasingly used in the fields of soft matter physics and biophysics to extract the dynamics of microscopic objects across a range of wavevectors by optical microscopy. Standard DDM is limited to detecting dynamics no faster than the camera frame rate. We report on an extension to DDM where we sequentially illuminate the sample with spectrally distinct light and image with a color camera. By pulsing blue and then red light separated by a lag time much smaller than the camera's exposure time, we are able to use this two-color DDM method to measure dynamics occurring much faster than the camera frame rate.
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Affiliation(s)
- Ruilin You
- Department of Physics and Biophysics, University of San Diego, San Diego, California 92110, USA
| | - Ryan McGorty
- Department of Physics and Biophysics, University of San Diego, San Diego, California 92110, USA
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17
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Zákutná D, Graef K, Dresen D, Porcar L, Honecker D, Disch S. In situ magnetorheological SANS setup at Institut Laue-Langevin. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04713-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
AbstractA magnetorheological sample environment is presented that allows for in situ magnetic field and shear flow during small-angle neutron scattering (SANS) measurements and is now available at the Institut Laue-Langevin (ILL). The setup allows performing simultaneous magnetorheological measurements together with the investigation of structural and magnetic changes on the nanometer length scale underlying the rheological response of ferrofluids. We describe the setup consisting of a commercial rheometer and a custom-made set of Helmholtz coils and show exemplarily data on the field and shear flow alignment of a dispersion of hematite nanospindles in water.
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18
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Nixon-Luke R, Bryant G. Differential dynamic microscopy to measure the translational diffusion coefficient of nanorods. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:115102. [PMID: 31756728 DOI: 10.1088/1361-648x/ab5a9c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We explore differential dynamic microscopy (DDM) as a low angle scattering technique to determine the translational diffusion coefficients of gold rod shaped nanoparticles. The method is tested using five differently sized nanorods, and compared with results obtained from polarized dynamic light scattering. For the rods studied here, the method of DDM may be a more robust technique as obtaining the translational diffusion coefficient is more straightforward. Results obtained from DDM are then used as an input to fitting depolarized dynamic light scattering data for the determination of the rotational diffusion coefficient. The measured diffusion coefficients are compared with theoretical predictions based on rod sizes.
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Affiliation(s)
- Reece Nixon-Luke
- Centre for Molecular and Nanoscale Physics, School of Science, RMIT University, Melbourne, Victoria 3001, Australia
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19
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Pal A, Martinez VA, Ito TH, Arlt J, Crassous JJ, Poon WCK, Schurtenberger P. Anisotropic dynamics and kinetic arrest of dense colloidal ellipsoids in the presence of an external field studied by differential dynamic microscopy. SCIENCE ADVANCES 2020; 6:eaaw9733. [PMID: 32010765 PMCID: PMC6968932 DOI: 10.1126/sciadv.aaw9733] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 11/20/2019] [Indexed: 05/25/2023]
Abstract
Anisotropic dynamics on the colloidal length scale is ubiquitous in nature. Of particular interest is the dynamics of systems approaching a kinetically arrested state. The failure of classical techniques for investigating the dynamics of highly turbid suspensions has contributed toward the limited experimental information available up until now. Exploiting the recent developments in the technique of differential dynamic microscopy (DDM), we report the first experimental study of the anisotropic collective dynamics of colloidal ellipsoids with a magnetic hematite core over a wide concentration range approaching kinetic arrest. In addition, we have investigated the effect of an external magnetic field on the resulting anisotropic collective diffusion. We combine DDM with small-angle x-ray scattering and rheological measurements to locate the glass transition and to relate the collective short- and long-time diffusion coefficients to the structural correlations and the evolution of the zero shear viscosity as the system approaches an arrested state.
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Affiliation(s)
- Antara Pal
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
| | - Vincent A. Martinez
- SUPA, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK
| | - Thiago H. Ito
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
| | - Jochen Arlt
- SUPA, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK
| | - Jérôme J. Crassous
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
| | - Wilson C. K. Poon
- SUPA, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, UK
| | - Peter Schurtenberger
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden
- Lund Institute of Advanced Neutron and X-ray Science (LINXS), Lund University, Lund, Sweden
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20
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Wulstein DM, Regan KE, Garamella J, McGorty RJ, Robertson-Anderson RM. Topology-dependent anomalous dynamics of ring and linear DNA are sensitive to cytoskeleton crosslinking. SCIENCE ADVANCES 2019; 5:eaay5912. [PMID: 31853502 PMCID: PMC6910835 DOI: 10.1126/sciadv.aay5912] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 10/18/2019] [Indexed: 05/21/2023]
Abstract
Cytoskeletal crowding plays a key role in the diffusion of DNA molecules through the cell, acting as a barrier to effective intracellular transport and conformational stability required for processes such as transfection, viral infection, and gene therapy. Here, we elucidate the transport properties and conformational dynamics of linear and ring DNA molecules diffusing through entangled and crosslinked composite networks of actin and microtubules. We couple single-molecule conformational tracking with differential dynamic microscopy to reveal that ring and linear DNA exhibit unexpectedly distinct transport properties that are influenced differently by cytoskeleton crosslinking. Ring DNA coils are swollen and undergo heterogeneous and biphasic subdiffusion that is hindered by crosslinking. Conversely, crosslinking actually facilitates the single-mode subdiffusion that compacted linear chains exhibit. Our collective results demonstrate that transient threading by cytoskeleton filaments plays a key role in the dynamics of ring DNA, whereas the mobility of the cytoskeleton dictates transport of linear DNA.
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Affiliation(s)
| | | | - Jonathan Garamella
- Department of Physics and Biophysics, University of San Diego, San Diego, CA 92110, USA
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21
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Adibnia V, Mirbagheri M, Latreille PL, Faivre J, Cécyre B, Robert J, Bouchard JF, Martinez VA, Delair T, David L, Hwang DK, Banquy X. Chitosan hydrogel micro-bio-devices with complex capillary patterns via reactive-diffusive self-assembly. Acta Biomater 2019; 99:211-219. [PMID: 31473363 DOI: 10.1016/j.actbio.2019.08.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 08/19/2019] [Accepted: 08/21/2019] [Indexed: 02/07/2023]
Abstract
We present chitosan hydrogel microfluidic devices with self-assembled complex microcapillary patterns, conveniently formed by a diffusion-reaction process. These patterns in chitosan hydrogels are formed by a single-step procedure involving diffusion of a gelation agent into the polymer solution inside a microfluidic channel. By changing the channel geometry, it is demonstrated how to control capillary length, trajectory and branching. Diffusion of nanoparticles (NPs) in the capillary network is used as a model to effectively mimic the transport of nano-objects in vascularized tissues. Gold NPs diffusion is measured locally in the hydrogel chips, and during their two-step transport through the capillaries to the gel matrix and eventually to embedded cell clusters in the gel. In addition, the quantitative analyses reported in this study provide novel opportunities for theoretical investigation of capillary formation and propagation during diffusive gelation of biopolymers. STATEMENT OF SIGNIFICANCE: Hydrogel micropatterning is a challenging task, which is of interest in several biomedical applications. Creating the patterns through self assembly is highly beneficial, because of the accessible and practical preparation procedure. In this study, we introduced complex self-assembled capillary patterns in chitosan hydrogels using a microfluidic approach. To demonstrate the potential application of these capillary patterns, a vascularized hydrogel with microwells occupied by cells was produced, and the diffusion of gold nanoparticles travelling in the capillaries and diffusing in the gel were evaluated. This model mimics a simplified biological tissue, where nanomedicine has to travel through the vasculature, extravasate into and diffuse through the extracellular matrix and eventually reach targeted cells.
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22
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Berger Bioucas FE, Damm C, Peukert W, Rausch MH, Koller TM, Giraudet C, Fröba AP. Translational and Rotational Diffusion Coefficients of Gold Nanorods Dispersed in Mixtures of Water and Glycerol by Polarized Dynamic Light Scattering. J Phys Chem B 2019; 123:9491-9502. [DOI: 10.1021/acs.jpcb.9b08274] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Francisco E. Berger Bioucas
- Institute of Advanced Optical Technologies − Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Paul-Gordan-Straße 8, 91052 Erlangen, Germany
| | - Cornelia Damm
- Institute of Particle Technology (LFG), Department of Chemical and Biological Engineering (CBI), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany
| | - Wolfgang Peukert
- Institute of Particle Technology (LFG), Department of Chemical and Biological Engineering (CBI), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany
| | - Michael H. Rausch
- Institute of Advanced Optical Technologies − Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Paul-Gordan-Straße 8, 91052 Erlangen, Germany
| | - Thomas M. Koller
- Institute of Advanced Optical Technologies − Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Paul-Gordan-Straße 8, 91052 Erlangen, Germany
| | - Cédric Giraudet
- Institute of Advanced Optical Technologies − Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Paul-Gordan-Straße 8, 91052 Erlangen, Germany
| | - Andreas P. Fröba
- Institute of Advanced Optical Technologies − Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Paul-Gordan-Straße 8, 91052 Erlangen, Germany
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23
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Latreille PL, Adibnia V, Nour A, Rabanel JM, Lalloz A, Arlt J, Poon WCK, Hildgen P, Martinez VA, Banquy X. Spontaneous shrinking of soft nanoparticles boosts their diffusion in confined media. Nat Commun 2019; 10:4294. [PMID: 31541104 PMCID: PMC6754464 DOI: 10.1038/s41467-019-12246-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 08/22/2019] [Indexed: 12/13/2022] Open
Abstract
Improving nanoparticles (NPs) transport across biological barriers is a significant challenge that could be addressed through understanding NPs diffusion in dense and confined media. Here, we report the ability of soft NPs to shrink in confined environments, therefore boosting their diffusion compared to hard, non-deformable particles. We demonstrate this behavior by embedding microgel NPs in agarose gels. The origin of the shrinking appears to be related to the overlap of the electrostatic double layers (EDL) surrounding the NPs and the agarose fibres. Indeed, it is shown that screening the EDL interactions, by increasing the ionic strength of the medium, prevents the soft particle shrinkage. The shrunken NPs diffuse up to 2 orders of magnitude faster in agarose gel than their hard NP counterparts. These findings provide valuable insights on the role of long range interactions on soft NPs dynamics in crowded environments, and help rationalize the design of more efficient NP-based transport systems.
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Affiliation(s)
- Pierre-Luc Latreille
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
| | - Vahid Adibnia
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
| | - Antone Nour
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
- Research Institute of the McGill University Health Centre, Injury Repair Recovery Program, Department of Surgery, Division of Orthopaedics, Montreal, QC, Canada
| | - Jean-Michel Rabanel
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
- INRS-Institut Armand-Frappier Research Centre, 531, boul. des Prairies, Laval, QC, H7V 1B7, Canada
| | - Augustine Lalloz
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
| | - Jochen Arlt
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK
| | - Wilson C K Poon
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK
| | - Patrice Hildgen
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada
| | - Vincent A Martinez
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK.
| | - Xavier Banquy
- Faculty of Pharmacy, Université de Montréal, PO Box 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada.
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24
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Arlt J, Martinez VA, Dawson A, Pilizota T, Poon WCK. Dynamics-dependent density distribution in active suspensions. Nat Commun 2019; 10:2321. [PMID: 31127122 PMCID: PMC6534614 DOI: 10.1038/s41467-019-10283-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/26/2019] [Indexed: 12/04/2022] Open
Abstract
Self-propelled colloids constitute an important class of intrinsically non-equilibrium matter. Typically, such a particle moves ballistically at short times, but eventually changes its orientation, and displays random-walk behaviour in the long-time limit. Theory predicts that if the velocity of non-interacting swimmers varies spatially in 1D, v(x), then their density ρ(x) satisfies ρ(x) = ρ(0)v(0)/v(x), where x = 0 is an arbitrary reference point. Such a dependence of steady-state ρ(x) on the particle dynamics, which was the qualitative basis of recent work demonstrating how to 'paint' with bacteria, is forbidden in thermal equilibrium. Here we verify this prediction quantitatively by constructing bacteria that swim with an intensity-dependent speed when illuminated and implementing spatially-resolved differential dynamic microscopy (sDDM) for quantitative analysis over millimeter length scales. Applying a spatial light pattern therefore creates a speed profile, along which we find that, indeed, ρ(x)v(x) = constant, provided that steady state is reached.
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Affiliation(s)
- Jochen Arlt
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD UK
| | - Vincent A. Martinez
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD UK
| | - Angela Dawson
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD UK
| | - Teuta Pilizota
- School of Biological Sciences and Centre for Synthetic and Systems Biology, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh, EH9 3FF UK
| | - Wilson C. K. Poon
- School of Physics & Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD UK
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25
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Zákutná D, Falke Y, Dresen D, Prévost S, Bender P, Honecker D, Disch S. Morphological and crystallographic orientation of hematite spindles in an applied magnetic field. NANOSCALE 2019; 11:7149-7156. [PMID: 30778464 DOI: 10.1039/c8nr09583c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The magnetic response of spindle-shaped hematite (α-Fe2O3) nanoparticles was investigated by simultaneous small-angle and wide-angle X-ray scattering (SAXS/WAXS) experiments. The field-dependent magnetic and nematic order parameters of the magnetic single-domain nanospindles in a static magnetic field are fully described by SAXS simulations of an oriented ellipsoid with the implemented Langevin function. The experimental scattering intensities of the spindle-like particles can be modeled simply by using the geometrical (length, radius, size distribution) and magnetic parameters (strength of magnetic field, magnetic moment) obtained from isotropic SAXS and macroscopic magnetization measurements, respectively. Whereas SAXS gives information on the morphological particle orientation in the applied field, WAXS texture analysis elucidates the atomic scale orientation of the magnetic easy direction in the hematite crystal structure. Our results strongly suggest the tendency for uniaxial anisotropy but indicate significant thermal fluctuations of the particle moments within the hematite basal plane.
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Affiliation(s)
- Dominika Zákutná
- Large Scale Structures group, Institut Laue-Langevin, 71 avenue des Martyrs, F-38042 Grenoble, France
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26
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Abstract
We demonstrate the use of a dual-camera-equipped microscope for the study of the wavevector-dependent dynamics of soft matter. Contrary to the standard differential dynamic microscopy (DDM) in which a series of digital video images is acquired with a single camera at a constant frame rate, we use two randomly triggered cameras to acquire two sequences of images of the same region in the sample. From the two data sets we calculate cross-image differences and Fourier analyze them as a function of time delay between the two images. We show that this technique can greatly decrease the time delay, which allows us to measure fast dynamics at larger wavevectors that could not have been performed with a single camera setup.
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Affiliation(s)
- Matej Arko
- JoŽef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
| | - Andrej Petelin
- JoŽef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia. and Faculty of Mathematics and Physics, Jadranska cesta 19, SI-1000 Ljubljana, Slovenia
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27
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Roth A, Murschel F, Latreille PL, Martinez VA, Liberelle B, Banquy X, De Crescenzo G. Coiled Coil Affinity-Based Systems for the Controlled Release of Biofunctionalized Gold Nanoparticles from Alginate Hydrogels. Biomacromolecules 2019; 20:1926-1936. [DOI: 10.1021/acs.biomac.9b00137] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Audrey Roth
- Department of Chemical Engineering, Groupe de Recherche en Sciences et Technologies Biomédicales (GRSTB), Bio-P2 Research Unit, École Polytechnique de Montréal, Montréal H3T 1J4, Québec, Canada
| | - Frederic Murschel
- Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal, Montréal H3T 1J4, Québec, Canada
| | - Pierre-Luc Latreille
- Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal, Montréal H3T 1J4, Québec, Canada
| | - Vincent A. Martinez
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, U.K
| | - Benoît Liberelle
- Department of Chemical Engineering, Groupe de Recherche en Sciences et Technologies Biomédicales (GRSTB), Bio-P2 Research Unit, École Polytechnique de Montréal, Montréal H3T 1J4, Québec, Canada
| | - Xavier Banquy
- Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal, Montréal H3T 1J4, Québec, Canada
| | - Gregory De Crescenzo
- Department of Chemical Engineering, Groupe de Recherche en Sciences et Technologies Biomédicales (GRSTB), Bio-P2 Research Unit, École Polytechnique de Montréal, Montréal H3T 1J4, Québec, Canada
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28
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Regan K, Wulstein D, Rasmussen H, McGorty R, Robertson-Anderson RM. Bridging the spatiotemporal scales of macromolecular transport in crowded biomimetic systems. SOFT MATTER 2019; 15:1200-1209. [PMID: 30543245 PMCID: PMC6365203 DOI: 10.1039/c8sm02023j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Crowding plays a key role in the transport and conformations of biological macromolecules. Gene therapy, viral infection, and transfection require DNA to traverse the crowded cytoplasm, including the cytoskeletal network of filamentous proteins. Given the complexity of cellular crowding, the dynamics of biological molecules can be highly dependent on the spatiotemporal scale probed. We present a powerful platform that spans molecular and cellular scales by coupling single-molecule conformational tracking (SMCT) and selective-plane illumination differential dynamic microscopy (SPIDDM). We elucidate the transport and conformational properties of large DNA, crowded by custom-designed networks of actin and microtubules, to link single-molecule conformations with ensemble DNA transport and cytoskeleton structure. We show that actin crowding leads to DNA compaction and suppression of fluctuations, combined with subdiffusion and heterogeneous transport, whereas microtubules have much more subdued impact across all scales. In composite networks of both filaments, scale-dependent effects emerge such that actin dictates ensemble DNA transport while microtubules influence single-molecule dynamics. We show that these intriguing results arise from a complex interplay between network rigidity, mesh size, filament concentration, and DNA size.
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Affiliation(s)
- Kathryn Regan
- Department of Physics and Biophysics, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA.
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Chen X, Liu D, Cai D, Qiu J, Peng L, Luo K, Han P. Coaxial differential dynamic microscopy for measurement of Brownian motion in weak optical field. OPTICS EXPRESS 2018; 26:32083-32090. [PMID: 30650787 DOI: 10.1364/oe.26.032083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 11/13/2018] [Indexed: 06/09/2023]
Abstract
Weak optical fields cause less damage to active cells and are easier to realize than traditional and tightly focused optical fields. While these fields are promising for biomedical science and particle manipulation applications, they lack a method for precise particle diffusion measurement because the weak fields cause the small changes in particle motion caused by weak fields. In this paper, we present a coaxial differential dynamic microscopy (CDDM) technique that uses a differential dynamic microscopy system, combined with an adjustable optical field. We use this technique to study Brownian motion of colloidal particles in weak optical fields. CDDM can quantitatively measure both the intensity and the pattern of the weak optical field and the diffusion coefficient of the particles. While the light paths of both the weak optical field and the illumination are coaxially incident on the sample cell, they remain independent. The optical field can be designed to have any pattern and adjusted to any intensity, while the measurements' sample illumination requirements are also satisfied. To verify the accuracy of the technique, we measured particle diffusion in weak Gaussian optical fields of different strengths. The diffusion coefficient was found to decrease with increasing field strength. These experimental results agree well with those results predicted using the Fokker-Planck equation and Euler algorithm simulations. This technique is expected to provide an efficient tool for research into particle manipulation by using weak optical fields, particularly for delicate systems, such as colloidal particles and biological cells.
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Roller J, Pfleiderer P, Meijer JM, Zumbusch A. Detection and tracking of anisotropic core-shell colloids. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:395903. [PMID: 30141415 DOI: 10.1088/1361-648x/aadcbf] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Optical microscopy techniques with three dimensional (3D) resolution are powerful tools for the real-space imaging of the structure and dynamics of colloidal systems. While real-space imaging of spherical particles is well established, the observation of shape anisotropic particles has only recently met a lot of interest. Apart from translation, shape anisotropic particles also possess additional rotational degrees of freedom. In this manuscript, we introduce a novel technique to find the position and the orientation of anisotropic particles in 3D. It is based on an algorithm which is applicable to core-shell particles consisting of a spherical core and a shell with arbitrary shape. We demonstrate the performance of this algorithm using PMMA/PMMA (polymethyl methacrylate) core-shell ellipsoids. The algorithm is tested on artificial images and on experimental data. The correct identification of particle positions with subpixel accuracy and of their orientations with high angular precision in dilute and dense systems is shown. In addition, we developed an advanced particle tracking algorithm that takes both translational and rotational movements of the anisotropic particles into account. We show that our 3D detection and tracking technique is suitable for the accurate and reliable detection of large and dense colloidal systems containing several thousands of particles.
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Affiliation(s)
- J Roller
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
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31
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Cerbino R, Cicuta P. Perspective: Differential dynamic microscopy extracts multi-scale activity in complex fluids and biological systems. J Chem Phys 2018; 147:110901. [PMID: 28938830 DOI: 10.1063/1.5001027] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Differential dynamic microscopy (DDM) is a technique that exploits optical microscopy to obtain local, multi-scale quantitative information about dynamic samples, in most cases without user intervention. It is proving extremely useful in understanding dynamics in liquid suspensions, soft materials, cells, and tissues. In DDM, image sequences are analyzed via a combination of image differences and spatial Fourier transforms to obtain information equivalent to that obtained by means of light scattering techniques. Compared to light scattering, DDM offers obvious advantages, principally (a) simplicity of the setup; (b) possibility of removing static contributions along the optical path; (c) power of simultaneous different microscopy contrast mechanisms; and (d) flexibility of choosing an analysis region, analogous to a scattering volume. For many questions, DDM has also advantages compared to segmentation/tracking approaches and to correlation techniques like particle image velocimetry. The very straightforward DDM approach, originally demonstrated with bright field microscopy of aqueous colloids, has lately been used to probe a variety of other complex fluids and biological systems with many different imaging methods, including dark-field, differential interference contrast, wide-field, light-sheet, and confocal microscopy. The number of adopting groups is rapidly increasing and so are the applications. Here, we briefly recall the working principles of DDM, we highlight its advantages and limitations, we outline recent experimental breakthroughs, and we provide a perspective on future challenges and directions. DDM can become a standard primary tool in every laboratory equipped with a microscope, at the very least as a first bias-free automated evaluation of the dynamics in a system.
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Affiliation(s)
- Roberto Cerbino
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Segrate 20090, Italy
| | - Pietro Cicuta
- Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
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Cerbino R. Quantitative optical microscopy of colloids: The legacy of Jean Perrin. Curr Opin Colloid Interface Sci 2018. [DOI: 10.1016/j.cocis.2018.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Arlt J, Martinez VA, Dawson A, Pilizota T, Poon WCK. Painting with light-powered bacteria. Nat Commun 2018; 9:768. [PMID: 29472614 PMCID: PMC5823856 DOI: 10.1038/s41467-018-03161-8] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 01/24/2018] [Indexed: 11/09/2022] Open
Abstract
Self-assembly is a promising route for micro- and nano-fabrication with potential to revolutionise many areas of technology, including personalised medicine. Here we demonstrate that external control of the swimming speed of microswimmers can be used to self assemble reconfigurable designer structures in situ. We implement such ‘smart templated active self assembly’ in a fluid environment by using spatially patterned light fields to control photon-powered strains of motile Escherichia coli bacteria. The physics and biology governing the sharpness and formation speed of patterns is investigated using a bespoke strain designed to respond quickly to changes in light intensity. Our protocol provides a distinct paradigm for self-assembly of structures on the 10 μm to mm scale. The ability to generate microscale patterns and control microswimmers may be useful for engineering smart materials. Here Arlt et al. use genetically modified bacteria with fast response to changes in light intensity to produce light-induced patterns.
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Affiliation(s)
- Jochen Arlt
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK.
| | - Vincent A Martinez
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK
| | - Angela Dawson
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK
| | - Teuta Pilizota
- School of Biological Sciences and Centre for Synthetic and Systems Biology, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh, EH9 3FF, UK
| | - Wilson C K Poon
- School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK
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Nack A, Seifert J, Passow C, Wagner J. Hindered nematic alignment of hematite spindles in poly(N-isopropylacrylamide) hydrogels: a small-angle X-ray scattering and rheology study. J Appl Crystallogr 2018. [DOI: 10.1107/s1600576717017411] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Field-induced changes to the mesostructure of ferrogels consisting of spindle-shaped hematite particles and poly(N-isopropylacrylamide) are investigated by means of small-angle X-ray scattering (SAXS). Related field-induced changes to the macroscopic viscoelastic properties of these composites are probed by means of oscillatory shear experiments in an external magnetic field. Because of their magnetic moment and magnetic anisotropy, the hematite spindles align with their long axis perpendicular to the direction of an external magnetic field. The field-induced torque acting on the magnetic particles leads to an elastic deformation of the hydrogel matrix. Thus, the field-dependent orientational distribution functions of anisotropic particles acting as microrheological probes depend on the elastic modulus of the hydrogel matrix. The orientational distribution functions are determined by means of SAXS experiments as a function of the varying flux density of an external magnetic field. With increasing elasticity of the hydrogels, tunedviathe polymer volume fraction and the crosslinking density, the field-induced alignment of these anisotropic magnetic particles is progressively hindered. The microrheological results are in accordance with macrorheological experiments indicating increasing elasticity with increasing flux density of an external field.
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Giavazzi F, Edera P, Lu PJ, Cerbino R. Image windowing mitigates edge effects in Differential Dynamic Microscopy. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2017; 40:97. [PMID: 29119324 DOI: 10.1140/epje/i2017-11587-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 10/25/2017] [Indexed: 06/07/2023]
Abstract
Differential Dynamic Microscopy (DDM) analyzes traditional real-space microscope images to extract information on sample dynamics in a way akin to light scattering, by decomposing each image in a sequence into Fourier modes, and evaluating their time correlation properties. DDM has been applied in a number of soft-matter and colloidal systems. However, objects observed to move out of the microscope's captured field of view, intersecting the edges of the acquired images, can introduce spurious but significant errors in the subsequent analysis. Here we show that application of a spatial windowing filter to images in a sequence before they enter the standard DDM analysis can reduce these artifacts substantially. Moreover, windowing can increase significantly the accessible range of wave vectors probed by DDM, and may further yield unexpected information, such as the size polydispersity of a colloidal suspension.
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Affiliation(s)
- Fabio Giavazzi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, via F.lli Cervi 93, 20090, Segrate, Italy
| | - Paolo Edera
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, via F.lli Cervi 93, 20090, Segrate, Italy
| | - Peter J Lu
- Department of Physics and SEAS, Harvard University, 02138, Cambridge, MA, USA
| | - Roberto Cerbino
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, via F.lli Cervi 93, 20090, Segrate, Italy.
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Escobedo-Sánchez MA, Rojas-Ochoa LF, Laurati M, Egelhaaf SU. Investigation of moderately turbid suspensions by heterodyne near field scattering. SOFT MATTER 2017; 13:5961-5969. [PMID: 28770942 DOI: 10.1039/c7sm00816c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Light scattering has proven to be a very powerful technique to characterize soft matter systems. However, many samples are turbid and hence suffer from multiple scattering which can affect the signal considerably. Multiple scattering can be reduced by diluting the sample or changing the solvent, but often this alters the sample and hence is precluded. Here we study the dynamics of a model system. In particular, we investigate the effects of moderate multiple scattering on small-angle heterodyne near field scattering (HNFS). Varying the particle concentration and size we change the degree of multiple scattering, which is quantified by the transmission of light. In dependence of the degree of multiple scattering, we analyze the statistical properties of the HNFS signal, which is the difference between two intensity patterns separated by a delay time. The distribution of intensity differences follows a Gaussian distribution if single scattering dominates and a Laplace distribution in the presence of extreme multiple scattering. We also investigate the effects of multiple scattering on the measured intermediate scattering function and the hydrodynamic radius of the particles. Reliable data are obtained for sample transmissions down to about 0.7. This is confirmed by a comparison with results from a far field cross-correlation instrument that suppresses multiple scattering contributions. Therefore, HNFS represents a technically simple but powerful method to investigate samples that are moderately multiple scattering.
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Affiliation(s)
- M A Escobedo-Sánchez
- Condensed Matter Physics Laboratory, Heinrich Heine University, Universitätsstraße 1, 40225 Düsseldorf, Germany.
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Feriani L, Juenet M, Fowler CJ, Bruot N, Chioccioli M, Holland SM, Bryant CE, Cicuta P. Assessing the Collective Dynamics of Motile Cilia in Cultures of Human Airway Cells by Multiscale DDM. Biophys J 2017; 113:109-119. [PMID: 28700909 PMCID: PMC5510766 DOI: 10.1016/j.bpj.2017.05.028] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 05/20/2017] [Accepted: 05/22/2017] [Indexed: 11/16/2022] Open
Abstract
The technique of differential dynamic microscopy is extended here, showing that it can provide a powerful and objective method of video analysis for optical microscopy videos of in vitro samples of live human bronchial epithelial ciliated cells. These cells are multiciliated, with motile cilia that play key physiological roles. It is shown that the ciliary beat frequency can be recovered to match conventional analysis, but in a fully automated fashion. Furthermore, it is shown that the properties of spatial and temporal coherence of cilia beat can be recovered and distinguished, and that if a collective traveling wave (the metachronal wave) is present, this has a distinct signature and its wavelength and direction can be measured.
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Affiliation(s)
- Luigi Feriani
- Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
| | - Maya Juenet
- Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
| | - Cedar J Fowler
- Laboratory of Clinical Infectious Diseases, National Institute of Health, Bethesda, Maryland; Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Nicolas Bruot
- Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
| | | | - Steven M Holland
- Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Clare E Bryant
- Laboratory of Clinical Infectious Diseases, National Institute of Health, Bethesda, Maryland
| | - Pietro Cicuta
- Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
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38
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Longbottom BW, Somuncuoğlu B, Punter JJ, Longbottom S, Bon SAF. Roughening up polymer microspheres and their diffusion in a liquid. SOFT MATTER 2017; 13:4285-4293. [PMID: 28573302 DOI: 10.1039/c7sm00589j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A simple, versatile approach for the roughening of polymer microparticles surfaces via a deformation technique in the presence of an inorganic matrix is presented here. The process consists of straightforward steps: (1) preparation of a bicomposite colloidal sol, that is polymer particles and inorganic particles, dispersed in a liquid, (2) drying of the mixture onto a suitable hard substrate, (3) heating the dried film above the glass transition temperature of the polymer, and (4) re-dispersion and chemical etching of the inorganic medium. The primary driver is capillary imbibition of the polymer melt into the inorganic colloidal template. In addition, 2D particle tracking experiments of dispersed rough particles in water were performed to probe the diffusional behaviour of the roughened objects in comparison with their smooth precursors. We show that, despite large scale roughness (up to 10% asperity size with respect to particle diameter), Stokes law is obeyed and the particle motion can be modelled simply with the Stokes-Einstein-Sutherland relation.
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Affiliation(s)
- Brooke W Longbottom
- The Department of Chemistry, The University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK. www.bonlab.info
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39
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Wulstein DM, Regan KE, Robertson-Anderson RM, McGorty R. Light-sheet microscopy with digital Fourier analysis measures transport properties over large field-of-view. OPTICS EXPRESS 2016; 24:20881-94. [PMID: 27607692 PMCID: PMC5946909 DOI: 10.1364/oe.24.020881] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Using light-sheet microscopy combined with digital Fourier methods we probe the dynamics of colloidal samples and DNA molecules. This combination, referred to as selective-plane illumination differential dynamic microscopy (SPIDDM), has the benefit of optical sectioning to study, with minimal photobleaching, thick samples allowing us to measure the diffusivity of colloidal particles at high volume fractions. Further, SPIDDM exploits the inherent spatially-varying thickness of Gaussian light-sheets. Where the excitation sheet is most focused, we capture high spatial frequency dynamics as the signal-to-background is high. In thicker regions, we capture the slower dynamics as diffusion out of the sheet takes longer.
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40
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Cohen AP, Dorosz S, Schofield AB, Schilling T, Sloutskin E. Structural Transition in a Fluid of Spheroids: A Low-Density Vestige of Jamming. PHYSICAL REVIEW LETTERS 2016; 116:098001. [PMID: 26991202 DOI: 10.1103/physrevlett.116.098001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Indexed: 06/05/2023]
Abstract
A thermodynamically equilibrated fluid of hard spheroids is a simple model of liquid matter. In this model, the coupling between the rotational degrees of freedom of the constituent particles and their translations may be switched off by a continuous deformation of a spheroid of aspect ratio t into a sphere (t=1). We demonstrate, by experiments, theory, and computer simulations, that dramatic nonanalytic changes in structure and thermodynamics of the fluids take place, as the coupling between rotations and translations is made to vanish. This nonanalyticity, reminiscent of a second-order liquid-liquid phase transition, is not a trivial consequence of the shape of an individual particle. Rather, free volume considerations relate the observed transition to a similar nonanalyticity at t=1 in structural properties of jammed granular ellipsoids. This observation suggests a deep connection to exist between the physics of jamming and the thermodynamics of simple fluids.
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Affiliation(s)
- A P Cohen
- Physics Department and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - S Dorosz
- Research Unit for Physics and Materials Science, Université du Luxembourg, L-1511 Luxembourg, Luxembourg
| | - A B Schofield
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
| | - T Schilling
- Research Unit for Physics and Materials Science, Université du Luxembourg, L-1511 Luxembourg, Luxembourg
| | - E Sloutskin
- Physics Department and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
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41
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Bayles AV, Squires TM, Helgeson ME. Dark-field differential dynamic microscopy. SOFT MATTER 2016; 12:2440-52. [PMID: 26822331 DOI: 10.1039/c5sm02576a] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Differential dynamic microscopy (DDM) is an emerging technique to measure the ensemble dynamics of colloidal and complex fluid motion using optical microscopy in systems that would otherwise be difficult to measure using other methods. To date, DDM has successfully been applied to linear space invariant imaging modes including bright-field, fluorescence, confocal, polarised, and phase-contrast microscopy to study diverse dynamic phenomena. In this work, we show for the first time how DDM analysis can be extended to dark-field imaging, i.e. a linear space variant (LSV) imaging mode. Specifically, we present a particle-based framework for describing dynamic image correlations in DDM, and use it to derive a correction to the image structure function obtained by DDM that accounts for scatterers with non-homogeneous intensity distributions as they move within the imaging plane. To validate the analysis, we study the Brownian motion of gold nanoparticles, whose plasmonic structure allows for nanometer-scale particles to be imaged under dark-field illumination, in Newtonian liquids. We find that diffusion coefficients of the nanoparticles can be reliably measured by dark-field DDM, even under optically dense concentrations where analysis via multiple-particle tracking microrheology fails. These results demonstrate the potential for DDM analysis to be applied to linear space variant forms of microscopy, providing access to experimental systems unavailable to other imaging modes.
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Affiliation(s)
- Alexandra V Bayles
- Department of Chemical Engineering, University of California Santa Barbara, 3357 Engineering II, Santa Barbara, CA 93106, USA.
| | - Todd M Squires
- Department of Chemical Engineering, University of California Santa Barbara, 3357 Engineering II, Santa Barbara, CA 93106, USA.
| | - Matthew E Helgeson
- Department of Chemical Engineering, University of California Santa Barbara, 3357 Engineering II, Santa Barbara, CA 93106, USA.
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42
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Schwarz-Linek J, Arlt J, Jepson A, Dawson A, Vissers T, Miroli D, Pilizota T, Martinez VA, Poon WC. Escherichia coli as a model active colloid: A practical introduction. Colloids Surf B Biointerfaces 2016; 137:2-16. [DOI: 10.1016/j.colsurfb.2015.07.048] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/17/2015] [Accepted: 07/19/2015] [Indexed: 10/23/2022]
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43
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Safari MS, Vorontsova MA, Poling-Skutvik R, Vekilov PG, Conrad JC. Differential dynamic microscopy of weakly scattering and polydisperse protein-rich clusters. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:042712. [PMID: 26565277 DOI: 10.1103/physreve.92.042712] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Indexed: 05/09/2023]
Abstract
Nanoparticle dynamics impact a wide range of biological transport processes and applications in nanomedicine and natural resource engineering. Differential dynamic microscopy (DDM) was recently developed to quantify the dynamics of submicron particles in solutions from fluctuations of intensity in optical micrographs. Differential dynamic microscopy is well established for monodisperse particle populations, but has not been applied to solutions containing weakly scattering polydisperse biological nanoparticles. Here we use bright-field DDM (BDDM) to measure the dynamics of protein-rich liquid clusters, whose size ranges from tens to hundreds of nanometers and whose total volume fraction is less than 10(-5). With solutions of two proteins, hemoglobin A and lysozyme, we evaluate the cluster diffusion coefficients from the dependence of the diffusive relaxation time on the scattering wave vector. We establish that for weakly scattering populations, an optimal thickness of the sample chamber exists at which the BDDM signal is maximized at the smallest sample volume. The average cluster diffusion coefficient measured using BDDM is consistently lower than that obtained from dynamic light scattering at a scattering angle of 90°. This apparent discrepancy is due to Mie scattering from the polydisperse cluster population, in which larger clusters preferentially scatter more light in the forward direction.
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Affiliation(s)
- Mohammad S Safari
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA
| | - Maria A Vorontsova
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA
| | - Ryan Poling-Skutvik
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA
| | - Peter G Vekilov
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA
- Department of Chemistry, University of Houston, Houston, Texas 77204-4004, USA
| | - Jacinta C Conrad
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA
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Wittmeier A, Holterhoff AL, Johnson J, Gibbs JG. Rotational Analysis of Spherical, Optically Anisotropic Janus Particles by Dynamic Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10402-10. [PMID: 26352095 DOI: 10.1021/acs.langmuir.5b02864] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We analyze the rotational dynamics of spherical colloidal Janus particles made from silica (SiO2) with a hemispherical gold/palladium (Au/Pd) cap. Since the refractive index difference between the surrounding fluid and a two-faced, optically anisotropic Janus microsphere is a function of the particle's orientation, it is possible to observe its rotational dynamics with bright-field optical microscopy. We investigate rotational diffusion and constant rotation of single Janus microspheres which are partially tethered to a solid surface so they are free to rotate but show little or no translational motion. Also, since the metal cap is a powerful catalyst in the breakdown of hydrogen peroxide, H2O2, the particles can be activated chemically. In this case, we analyze the motion of coupled Janus dimers which undergo a stable rotary motion about a mutual center. The analysis of both experimental and simulation data, which are microscopy and computer-generated videos, respectively, is based upon individual particle tracking and differential dynamic microscopy (DDM). DDM, which typically requires ensemble averages to extract meaningful information for colloidal dynamics, can be effective in certain situations for systems consisting of single entities. In particular, when translational motion is suppressed, both rotational diffusion and constant rotation can be probed.
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Affiliation(s)
- Andrew Wittmeier
- Department of Physics and Astronomy and ‡Center for Bioengineering Innovation, Northern Arizona University , S San Francisco St., Flagstaff, Arizona 86011, United States
| | - Andrew Leeth Holterhoff
- Department of Physics and Astronomy and ‡Center for Bioengineering Innovation, Northern Arizona University , S San Francisco St., Flagstaff, Arizona 86011, United States
| | - Joel Johnson
- Department of Physics and Astronomy and ‡Center for Bioengineering Innovation, Northern Arizona University , S San Francisco St., Flagstaff, Arizona 86011, United States
| | - John G Gibbs
- Department of Physics and Astronomy and ‡Center for Bioengineering Innovation, Northern Arizona University , S San Francisco St., Flagstaff, Arizona 86011, United States
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45
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Stolzer L, Vigovskaya A, Barner-Kowollik C, Fruk L. A Self-Reporting Tetrazole-Based Linker for the Biofunctionalization of Gold Nanorods. Chemistry 2015; 21:14309-13. [DOI: 10.1002/chem.201502070] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Indexed: 11/11/2022]
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Oprisan A, Oprisan SA, Hegseth JJ, Garrabos Y, Lecoutre C, Beysens D. Direct imaging of long-range concentration fluctuations in a ternary mixture. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2015; 38:17. [PMID: 25788436 DOI: 10.1140/epje/i2015-15017-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 11/10/2014] [Accepted: 02/04/2015] [Indexed: 06/04/2023]
Abstract
We used a direct imaging technique to investigate concentration fluctuations enhanced by thermal fluctuations in a ternary mixture of methanol (Me), cyclohexane (C), and partially deuterated cyclohexane (C*) within 1mK above its consolute critical point. The experimental setup used a low-coherence white-light source and a red filter to visualize fluctuation images. The red-filtered images were analyzed off-line using a differential dynamic microscopy algorithm that allowed us to determine the correlation time, τ, of concentration fluctuations. From τ, we determined the mutual mass diffusion coefficient, D, very near and above the critical point of Me-CC* mixtures. We also numerically estimated both the background and critical contributions to D and compared the results against our experimental values determined from τ. We found that the experimental value of D is close to the prediction based on Stokes-Einstein diffusion law with Kawasaki's correction.
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Affiliation(s)
- Ana Oprisan
- Department of Physics and Astronomy, College of Charleston, 29424, Charleston, SC, USA,
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Roeder L, Bender P, Kundt M, Tschöpe A, Schmidt AM. Magnetic and geometric anisotropy in particle-crosslinked ferrohydrogels. Phys Chem Chem Phys 2015; 17:1290-8. [DOI: 10.1039/c4cp04493b] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Particle-crosslinked polymer composites and gels have recently been shown to possess novel or improved properties due to a covalent particle–matrix interaction.
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Affiliation(s)
- Lisa Roeder
- Department Chemie
- Institut für Physikalische Chemie
- Universität zu Köln
- D-50939 Köln
- Germany
| | - Philipp Bender
- Technische Physik
- Universität des Saarlandes
- D-66041 Saarbrücken
- Germany
| | - Matthias Kundt
- Department Chemie
- Institut für Physikalische Chemie
- Universität zu Köln
- D-50939 Köln
- Germany
| | - Andreas Tschöpe
- Technische Physik
- Universität des Saarlandes
- D-66041 Saarbrücken
- Germany
| | - Annette M. Schmidt
- Department Chemie
- Institut für Physikalische Chemie
- Universität zu Köln
- D-50939 Köln
- Germany
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48
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Reufer M, Besseling R, Schwarz-Linek J, Martinez VA, Morozov AN, Arlt J, Trubitsyn D, Ward FB, Poon WCK. Switching of Swimming Modes in Magnetospirillium gryphiswaldense. Biophys J 2014; 106:37-46. [PMID: 24411235 DOI: 10.1016/j.bpj.2013.10.038] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 10/16/2013] [Accepted: 10/28/2013] [Indexed: 10/25/2022] Open
Abstract
The microaerophilic magnetotactic bacterium Magnetospirillum gryphiswaldense swims along magnetic field lines using a single flagellum at each cell pole. It is believed that this magnetotactic behavior enables cells to seek optimal oxygen concentration with maximal efficiency. We analyze the trajectories of swimming M. gryphiswaldense cells in external magnetic fields larger than the earth's field, and show that each cell can switch very rapidly (in <0.2 s) between a fast and a slow swimming mode. Close to a glass surface, a variety of trajectories were observed, from straight swimming that systematically deviates from field lines to various helices. A model in which fast (slow) swimming is solely due to the rotation of the trailing (leading) flagellum can account for these observations. We determined the magnetic moment of this bacterium using a to our knowledge new method, and obtained a value of (2.0±0.6) × 10(-16) A · m(2). This value is found to be consistent with parameters emerging from quantitative fitting of trajectories to our model.
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Affiliation(s)
- M Reufer
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom.
| | - R Besseling
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
| | - J Schwarz-Linek
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
| | - V A Martinez
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
| | - A N Morozov
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
| | - J Arlt
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
| | - D Trubitsyn
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom; Institute of Cell Biology, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
| | - F B Ward
- Institute of Cell Biology, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
| | - W C K Poon
- SUPA and COSMIC, School of Physics and Astronomy, The University of Edinburgh, King's Buildings, Edinburgh, United Kingdom
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49
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Giavazzi F, Crotti S, Speciale A, Serra F, Zanchetta G, Trappe V, Buscaglia M, Bellini T, Cerbino R. Viscoelasticity of nematic liquid crystals at a glance. SOFT MATTER 2014; 10:3938-3949. [PMID: 24728549 DOI: 10.1039/c4sm00145a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polarised microscopy is shown to be a powerful alternative to light scattering for the determination of the viscoelasticity of aligned nematic liquid crystals. We perform experiments in a wide range of temperatures by using an adapted version of the recently introduced differential dynamic microscopy technique, which enables us to extract scattering information directly from the microscope images. A dynamic analysis of the images acquired in different geometries provides the splay, twist and bend viscoelastic ratios. A static analysis allows a successful determination of the bend elastic constant. All our results are in excellent agreement with those obtained with the far more time-consuming depolarised light scattering techniques. Remarkably, a noteworthy extension of the investigated temperature-range is observed, owing to the lower sensitivity of microscopy to multiple scattered light. Moreover, we show that the unique space-resolving capacities of our method enable us to investigate nematics in the presence of spatial disorder, where traditional light scattering fails. Our findings demonstrate that the proposed scattering-with-images approach provides a space-resolved probe of the local sample properties, applicable also to other optically anisotropic soft materials.
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Affiliation(s)
- Fabio Giavazzi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Universitá degli Studi di Milano, via F.lli Cervi 93, 20090 Segrate, Italy.
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50
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Russell S, Samkoe KS, Gunn JR, Hoopes PJ, Nguyen TA, Russell MJ, Alfano RR, Pogue BW. Spatial frequency analysis of anisotropic drug transport in tumor samples. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:15005. [PMID: 24395585 PMCID: PMC4019416 DOI: 10.1117/1.jbo.19.1.015005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 11/20/2013] [Accepted: 11/27/2013] [Indexed: 05/30/2023]
Abstract
Directional Fourier spatial frequency analysis was used on standard histological sections to identify salient directional bias in the spatial frequencies of stromal and epithelial patterns within tumor tissue. This directional bias is shown to be correlated to the pathway of reduced fluorescent tracer transport. Optical images of tumor specimens contain a complex distribution of randomly oriented aperiodic features used for neoplastic grading that varies with tumor type, size, and morphology. The internal organization of these patterns in frequency space is shown to provide a precise fingerprint of the extracellular matrix complexity, which is well known to be related to the movement of drugs and nanoparticles into the parenchyma, thereby identifying the characteristic spatial frequencies of regions that inhibit drug transport. The innovative computational methodology and tissue validation techniques presented here provide a tool for future investigation of drug and particle transport in tumor tissues, and could potentially be used a priori to identify barriers to transport, and to analyze real-time monitoring of transport with respect to therapeutic intervention.
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Affiliation(s)
- Stewart Russell
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire 03755
- City College of New York, Mechanical Engineering Department, New York, New York 10031
- City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Physics Department, New York, New York 10031
- New York Structural Biology Center, New York, New York 10027
| | - Kimberley S. Samkoe
- Dartmouth College, Geisel School of Medicine, Department of Surgery, Hanover, New Hampshire 03755
| | - Jason R. Gunn
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire 03755
| | - P. Jack Hoopes
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire 03755
- Dartmouth College, Geisel School of Medicine, Department of Surgery, Hanover, New Hampshire 03755
| | - Thienan A. Nguyen
- City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Physics Department, New York, New York 10031
| | - Milo J. Russell
- New York Structural Biology Center, New York, New York 10027
- City College of New York, Chemistry Department, New York, New York 10031
| | - Robert R. Alfano
- City College of New York, Institute for Ultrafast Spectroscopy and Lasers, Physics Department, New York, New York 10031
| | - Brian W. Pogue
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire 03755
- Dartmouth College, Geisel School of Medicine, Department of Surgery, Hanover, New Hampshire 03755
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