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Bolteau B, Gelebart F, Teisseire J, Barthel E, Fresnais J. Digital Microfluidics─How Magnetically Driven Orientation of Pillars Influences Droplet Positioning. ACS Appl Mater Interfaces 2023. [PMID: 37431993 DOI: 10.1021/acsami.3c05734] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
Interfaces between a water droplet and a network of pillars produce eventually superhydrophobic, self-cleaning properties. Considering the surface fraction of the surface in interaction with water, it is possible to tune precisely the contact angle hysteresis (CAH) to low values, which is at the origin of the poor adhesion of water droplets, inducing their high mobility on such a surface. However, if one wants to move and position a droplet, the lower the CAH, the less precise will be the positioning on the surface. While rigid surfaces limit the possibilities of actuation, smart surfaces have been devised with which a stimulus can be used to trigger the displacement of a droplet. Light, electron beam, mechanical stimulation like vibration, or magnetism can be used to induce a displacement of droplets on surfaces and transfer them from one position to the targeted one. Among these methods, only few are reversible, leading to anisotropy-controlled orientation of the structured interface with water. Magnetically driven superhydrophobic surfaces are the most promising reprogramming surfaces that can lead to the control of wettability and droplet guidance.
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Affiliation(s)
- Blandine Bolteau
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX─UMR 8234, F-75252 Paris Cedex 05, France
- Sciences et Ingénierie de la Matière Molle, ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 75005 Paris, France
- Surface du Verre et Interfaces, UMR 125 CNRS/Saint-Gobain, 39 Quai Lucien Lefranc, F-93303 Aubervilliers Cedex, France
| | - Frédéric Gelebart
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX─UMR 8234, F-75252 Paris Cedex 05, France
| | - Jérémie Teisseire
- Surface du Verre et Interfaces, UMR 125 CNRS/Saint-Gobain, 39 Quai Lucien Lefranc, F-93303 Aubervilliers Cedex, France
| | - Etienne Barthel
- Sciences et Ingénierie de la Matière Molle, ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 75005 Paris, France
| | - Jérôme Fresnais
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX─UMR 8234, F-75252 Paris Cedex 05, France
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2
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Benghouzi P, Louadj L, Pagani A, Garnier M, Fresnais J, Gonzato C, Sabbah M, Griffete N. Synthesis of Fluorescent, Small, Stable and Non-Toxic Epitope-Imprinted Polymer Nanoparticles in Water. Polymers (Basel) 2023; 15:polym15051112. [PMID: 36904354 PMCID: PMC10007256 DOI: 10.3390/polym15051112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
Molecularly imprinted polymers (MIPs) are really interesting for nanomedicine. To be suitable for such application, they need to be small, stable in aqueous media and sometimes fluorescent for bioimaging. We report herein, the facile synthesis of fluorescent, small (below 200 nm), water-soluble and water-stable MIP capable of specific and selective recognition of their target epitope (small part of a protein). To synthesize these materials, we used dithiocarbamate-based photoiniferter polymerization in water. The use of a rhodamine-based monomer makes the resulting polymers fluorescent. Isothermal titration calorimetry (ITC) is used to determine the affinity as well as the selectivity of the MIP for its imprinted epitope, according to the significant differences observed when comparing the binding enthalpy of the original epitope with that of other peptides. The toxicity of the nanoparticles is also tested in two breast cancer cell lines to show the possible use of these particle for future in vivo applications. The materials demonstrated a high specificity and selectivity for the imprinted epitope, with a Kd value comparable with the affinity values of antibodies. The synthesized MIP are not toxic, which makes them suitable for nanomedicine.
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Affiliation(s)
- Perla Benghouzi
- Physico-Chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
| | - Lila Louadj
- Physico-Chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
- Saint-Antoine Research Center (CRSA) INSERM, CNRS, Sorbonne Université, 75012 Paris, France
| | - Aurélia Pagani
- Physico-Chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
- Saint-Antoine Research Center (CRSA) INSERM, CNRS, Sorbonne Université, 75012 Paris, France
| | - Maylis Garnier
- Physico-Chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
- Saint-Antoine Research Center (CRSA) INSERM, CNRS, Sorbonne Université, 75012 Paris, France
| | - Jérôme Fresnais
- Physico-Chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
| | - Carlo Gonzato
- Laboratory for Enzyme and Cell Engineering UMR 7025, CNRS, Université de Technologie de Compiègne, Rue du Docteur Schweitzer, 60203 Compiègne, France
| | - Michèle Sabbah
- Saint-Antoine Research Center (CRSA) INSERM, CNRS, Sorbonne Université, 75012 Paris, France
| | - Nébéwia Griffete
- Physico-Chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
- Correspondence:
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3
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Poirier A, Le Griel P, Hoffmann I, Perez J, Pernot P, Fresnais J, Baccile N. Ca 2+ and Ag + orient low-molecular weight amphiphile self-assembly into "nano-fishnet" fibrillar hydrogels with unusual β-sheet-like raft domains. Soft Matter 2023; 19:378-393. [PMID: 36562421 DOI: 10.1039/d2sm01218a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Low-molecular weight gelators (LMWGs) are small molecules (Mw < ∼1 kDa), which form self-assembled fibrillar network (SAFiN) hydrogels in water when triggered by an external stimulus. A great majority of SAFiN gels involve an entangled network of self-assembled fibers, in analogy to a polymer in a good solvent. In some rare cases, a combination of attractive van der Waals and repulsive electrostatic forces drives the formation of bundles with a suprafibrillar hexagonal order. In this work, an unexpected micelle-to-fiber transition is triggered by Ca2+ or Ag+ ions added to a micellar solution of a novel glycolipid surfactant, whereas salt-induced fibrillation is not common for surfactants. The resulting SAFiN, which forms a hydrogel above 0.5 wt%, has a "nano-fishnet" structure, characterized by a fibrous network of both entangled fibers and β-sheet-like rafts, generally observed for silk fibroin, actin hydrogels or mineral imogolite nanotubes, but not known for SAFiNs. The β-sheet-like raft domains are characterized by a combination of cryo-TEM and SAXS and seem to contribute to the stability of glycolipid gels. Furthermore, glycolipid is obtained by fermentation from natural resources (glucose, rapeseed oil), thus showing that naturally engineered compounds can have unprecedented properties, when compared to the wide range of chemically derived amphiphiles.
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Affiliation(s)
- Alexandre Poirier
- Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP, F-75005 Paris, France.
| | - Patrick Le Griel
- Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP, F-75005 Paris, France.
| | | | - Javier Perez
- Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin, BP48, 91192 Gif-sur-Yvette Cedex, France
| | - Petra Pernot
- ESRF - The European Synchrotron, CS40220, 38043 Grenoble, France
| | - Jérôme Fresnais
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX - UMR 8234, F-75252, Paris Cedex 05, France
| | - Niki Baccile
- Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP, F-75005 Paris, France.
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Dhillon K, Aizel K, Broomhall TJ, Secret E, Goodman T, Rotherham M, Telling N, Siaugue JM, Ménager C, Fresnais J, Coppey M, El Haj AJ, Gates MA. Directional control of neurite outgrowth: emerging technologies for Parkinson's disease using magnetic nanoparticles and magnetic field gradients. J R Soc Interface 2022; 19:20220576. [PMID: 36349444 PMCID: PMC9653228 DOI: 10.1098/rsif.2022.0576] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/19/2022] [Indexed: 08/08/2023] Open
Abstract
A challenge in current stem cell therapies for Parkinson's disease (PD) is controlling neuronal outgrowth from the substantia nigra towards the targeted area where connectivity is required in the striatum. Here we present progress towards controlling directional neurite extensions through the application of iron-oxide magnetic nanoparticles (MNPs) labelled neuronal cells combined with a magnetic array generating large spatially variant field gradients (greater than 20 T m-1). We investigated the viability of this approach in both two-dimensional and organotypic brain slice models and validated the observed changes in neurite directionality using mathematical models. Results showed that MNP-labelled cells exhibited a shift in directional neurite outgrowth when cultured in a magnetic field gradient, which broadly agreed with mathematical modelling of the magnetic force gradients and predicted MNP force direction. We translated our approach to an ex vivo rat brain slice where we observed directional neurite outgrowth of transplanted MNP-labelled cells from the substantia nigra towards the striatum. The improved directionality highlights the viability of this approach as a remote-control methodology for the control and manipulation of cellular growth for regenerative medicine applications. This study presents a new tool to overcome challenges faced in the development of new therapies for PD.
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Affiliation(s)
- K. Dhillon
- Healthcare Technologies Institute, Department of Chemical Engineering, University of Birmingham, Birmingham, UK
| | - K. Aizel
- Institut Curie, PSL Research University, CNRS, Sorbonne Université, Physico Chimie, Paris, France
| | - T. J. Broomhall
- Healthcare Technologies Institute, Department of Chemical Engineering, University of Birmingham, Birmingham, UK
| | - E. Secret
- Sorbonne Université, CNRS, Laboratoire Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, 75005 Paris, France
| | - T. Goodman
- School of Pharmacy and Bioengineering, Guy Hilton Research Centre, Keele University, Staffordshire, UK
| | - M. Rotherham
- Healthcare Technologies Institute, Department of Chemical Engineering, University of Birmingham, Birmingham, UK
| | - N. Telling
- School of Pharmacy and Bioengineering, Guy Hilton Research Centre, Keele University, Staffordshire, UK
| | - J. M. Siaugue
- Sorbonne Université, CNRS, Laboratoire Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, 75005 Paris, France
| | - C. Ménager
- Sorbonne Université, CNRS, Laboratoire Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, 75005 Paris, France
| | - J. Fresnais
- Sorbonne Université, CNRS, Laboratoire Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, 75005 Paris, France
| | - M. Coppey
- Institut Curie, PSL Research University, CNRS, Sorbonne Université, Physico Chimie, Paris, France
| | - A. J. El Haj
- Healthcare Technologies Institute, Department of Chemical Engineering, University of Birmingham, Birmingham, UK
| | - M. A. Gates
- School of Pharmacy and Bioengineering, Guy Hilton Research Centre, Keele University, Staffordshire, UK
- School of Medicine, Keele University, Staffordshire, UK
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Demirelli M, Peyre V, Sirieix-Plénet J, Malikova N, Fresnais J. Influence of polycation/cation competition on the aggregation threshold of magnetic nanoparticles. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Ayeb H, Derbali M, Mouhli A, Soltani T, Jomni F, Fresnais J, Lacaze E. Viscoelastic and dielectric properties of 5CB nematic liquid crystal doped by magnetic and nonmagnetic nanoparticles. Phys Rev E 2020; 102:052703. [PMID: 33327168 DOI: 10.1103/physreve.102.052703] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 11/06/2020] [Indexed: 11/07/2022]
Abstract
In this article we show how spherical nanoparticles (NPs) imposing planar anchoring can strongly impact the viscoelastic, dielectric, and electro-optical properties of a nematic liquid crystal when they are not aggregated. We also demonstrate that when the NPs are magnetic, most nematic properties are more impacted than when they are nonmagnetic. With magnetic NPs a molecular disorder is induced that decreases the nematic order parameter, this decrease impacting the values of elastic constants, viscosity, and response time. The impact on 5CB liquid crystal (LC) has been investigated with spherical nanoparticles (NPs) of identical size around 6 nm, magnetic (γFe_{2}O_{3}), and nonmagnetic (CeO_{2}) ones that are both surface functionalized by poly(aminopropylmethylsiloxane-b-dimethylsiloxane) (PAPMS-b-PDMS) block copolymer ligands to promote planar anchoring. In the presence of nonmagnetic NPs, despite an almost constant nematic order parameter, a significant decrease of elastic constants (25.4%), viscosity (22%), and response time (23%) is measured. It suggests a dilution effect for the intermolecular interactions in the presence of NPs. This hypothesis is supported by the observation of an enhanced decrease of the same nematic parameters in the presence of magnetic NPs that can be fully explained by the corresponding order parameter decrease. This finally leads to a remarkable decrease of the splay elastic constant by 51% in the presence of magnetic NPs. The decrease of the nematic order parameter by 18% in the presence of magnetic NPs demonstrates that the NP magnetic moments are only weakly coupled to the nematic director and consequently only induce a disorder in the composite system. A significant influence of the expected large LC structural modifications in the presence of magnetic NPs is, however, shown by a particularly large increase of the diffusion coefficient 43% and large decrease of the dielectric anisotropy (43%). We believe that the observed impact of NPs with planar anchoring on nematic properties could be extended to most spherical NPs if their aggregation can be avoided. In particular, the difference between magnetic and nonmagnetic NPs could be extended to ferroelectric and nonferroelectric NPs.
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Affiliation(s)
- Habib Ayeb
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR99ES16 Laboratoire de Physique de la Matière Molle et de la Modélisation Electromagnétique, 2092 Tunis, Tunisie
| | - Mouna Derbali
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR99ES16 Laboratoire de Physique de la Matière Molle et de la Modélisation Electromagnétique, 2092 Tunis, Tunisie
| | - Ahmed Mouhli
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR99ES16 Laboratoire de Physique de la Matière Molle et de la Modélisation Electromagnétique, 2092 Tunis, Tunisie
| | - Taoufik Soltani
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR99ES16 Laboratoire de Physique de la Matière Molle et de la Modélisation Electromagnétique, 2092 Tunis, Tunisie
| | - Fathi Jomni
- Université de Tunis El Manar, Laboratoire Matériaux Organisation et Propriétés (LR99ES17), 2092, Tunis, Tunisie
| | - Jérôme Fresnais
- Sorbonne Universités, UPMC Université Paris 06, UMR 8234, PHENIX, F75005 Paris, France
| | - Emmanuelle Lacaze
- Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 7588, Institut des Nano-Sciences de Paris (INSP), F75005 Paris, France
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7
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Bongaerts M, Aizel K, Secret E, Jan A, Nahar T, Raudzus F, Neumann S, Telling N, Heumann R, Siaugue JM, Ménager C, Fresnais J, Villard C, El Haj A, Piehler J, Gates MA, Coppey M. Parallelized Manipulation of Adherent Living Cells by Magnetic Nanoparticles-Mediated Forces. Int J Mol Sci 2020; 21:ijms21186560. [PMID: 32911745 PMCID: PMC7555211 DOI: 10.3390/ijms21186560] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/01/2020] [Accepted: 09/04/2020] [Indexed: 12/14/2022] Open
Abstract
The remote actuation of cellular processes such as migration or neuronal outgrowth is a challenge for future therapeutic applications in regenerative medicine. Among the different methods that have been proposed, the use of magnetic nanoparticles appears to be promising, since magnetic fields can act at a distance without interactions with the surrounding biological system. To control biological processes at a subcellular spatial resolution, magnetic nanoparticles can be used either to induce biochemical reactions locally or to apply forces on different elements of the cell. Here, we show that cell migration and neurite outgrowth can be directed by the forces produced by a switchable parallelized array of micro-magnetic pillars, following the passive uptake of nanoparticles. Using live cell imaging, we first demonstrate that adherent cell migration can be biased toward magnetic pillars and that cells can be reversibly trapped onto these pillars. Second, using differentiated neuronal cells we were able to induce events of neurite outgrowth in the direction of the pillars without impending cell viability. Our results show that the range of forces applied needs to be adapted precisely to the cellular process under consideration. We propose that cellular actuation is the result of the force on the plasma membrane caused by magnetically filled endo-compartments, which exert a pulling force on the cell periphery.
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Affiliation(s)
- Maud Bongaerts
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS, 75005 Paris, France; (M.B.); (K.A.)
| | - Koceila Aizel
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS, 75005 Paris, France; (M.B.); (K.A.)
| | - Emilie Secret
- Physico-chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, Sorbonne Université, CNRS, F-75005 Paris, France; (E.S.); (J.-M.S.); (C.M.); (J.F.)
| | - Audric Jan
- Laboratoire Physico Chimie Curie, Institut Pierre Gilles de Gène, Institut Curie, PSL Research University, Sorbonne Université, CNRS, 75005 Paris, France; (A.J.); (C.V.)
| | - Tasmin Nahar
- Guy Hilton Research Centre, School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire ST4 7QB, UK; (T.N.); (N.T.)
| | - Fabian Raudzus
- Department of Biochemistry II – Molecular Neurobiochemistry, Faculty of Chemistry and Biochemistry, Ruhr-Universität Bochum, 44801 Bochum, Germany; (F.R.); (S.N.); (R.H.)
- Department of Clinical Application, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto 606-8507, Japan
| | - Sebastian Neumann
- Department of Biochemistry II – Molecular Neurobiochemistry, Faculty of Chemistry and Biochemistry, Ruhr-Universität Bochum, 44801 Bochum, Germany; (F.R.); (S.N.); (R.H.)
| | - Neil Telling
- Guy Hilton Research Centre, School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire ST4 7QB, UK; (T.N.); (N.T.)
| | - Rolf Heumann
- Department of Biochemistry II – Molecular Neurobiochemistry, Faculty of Chemistry and Biochemistry, Ruhr-Universität Bochum, 44801 Bochum, Germany; (F.R.); (S.N.); (R.H.)
| | - Jean-Michel Siaugue
- Physico-chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, Sorbonne Université, CNRS, F-75005 Paris, France; (E.S.); (J.-M.S.); (C.M.); (J.F.)
| | - Christine Ménager
- Physico-chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, Sorbonne Université, CNRS, F-75005 Paris, France; (E.S.); (J.-M.S.); (C.M.); (J.F.)
| | - Jérôme Fresnais
- Physico-chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, Sorbonne Université, CNRS, F-75005 Paris, France; (E.S.); (J.-M.S.); (C.M.); (J.F.)
| | - Catherine Villard
- Laboratoire Physico Chimie Curie, Institut Pierre Gilles de Gène, Institut Curie, PSL Research University, Sorbonne Université, CNRS, 75005 Paris, France; (A.J.); (C.V.)
| | - Alicia El Haj
- Healthcare Technology Institute, Institute of Translational Medicine, University of Birmingham, Birmingham B15 2TT, UK;
| | - Jacob Piehler
- Department of Biology/Chemistry, University of Osnabrück, Barbarastr. 11, 49076 Osnabrück, Germany;
| | - Monte A. Gates
- Institute of Pharmacy and Bioengineering, School of Medicine, Keele University, Keele ST5 5BG, UK;
| | - Mathieu Coppey
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS, 75005 Paris, France; (M.B.); (K.A.)
- Correspondence:
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Rigoni C, Fresnais J, Talbot D, Massart R, Perzynski R, Bacri JC, Abou-Hassan A. Magnetic Field-Driven Deformation, Attraction, and Coalescence of Nonmagnetic Aqueous Droplets in an Oil-Based Ferrofluid. Langmuir 2020; 36:5048-5057. [PMID: 32302141 DOI: 10.1021/acs.langmuir.0c00060] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Stimuli-responsive compartments are attracting more and more attention through the years motivated by their wide applications in different fields including encapsulation, manipulation, and triggering of chemical reactions on demand. Among others, magnetic responsive compartments are particularly attractive due to the numerous advantages of magnetic fields compared to other external stimuli. In this article, we used an oil-based ferrofluid where the magnetic nanoparticles have been coated with different polymers to increase their amphiphilic character and surface activity, consequently rendering the interface magnetically responsive. Microliter aqueous nonmagnetic droplets dispersed in the oil-based ferrofluid were used as a model of microreactors. A comprehensive experimental and theoretical study of the deformation, attraction, and coalescence processes of the nonmagnetic water droplets coated with the magnetic nanoparticles under an applied magnetic field in the continuous oil-based ferrofluid phase is provided. To manipulate the packing of the nanoparticles at the water/oil interface, the ionic strength of the aqueous droplets was varied using different NaCl concentrations, and its effect on modulating the coalescence of the droplets was probed. Our results show that the water droplets deform along the magnetic field depending on the magnetic properties of the ferrofluid itself and on the surface properties of the interface, attract in pairs under the action of the magnetic dipole force, and coalesce by the action of the same force with a stochastic behavior. We have studied all of these phenomena as a function of the magnetic field applied, evaluating in each case the forces and/or pressures acting on the droplets with particular attention to roles of magnetic attraction, interface properties, and viscosity in the system. This work offers an overall set of tools to understand and predict the behavior of multiple water droplets in an oil-based ferrofluid for lab-on-a-chip applications.
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Affiliation(s)
- C Rigoni
- Dipartimento di Fisica e Astronomia "G. Galilei", Università di Padova, via Marzolo 8, 35131 Padova, Italy
- Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Espoo, Finland
| | - J Fresnais
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), F-75005 Paris, France
| | - D Talbot
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), F-75005 Paris, France
| | - R Massart
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), F-75005 Paris, France
| | - R Perzynski
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), F-75005 Paris, France
| | - J-C Bacri
- Laboratoire Matière et Systèmes Complexes, CNRS UMR 7057, Université de Paris, 10 Rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
| | - A Abou-Hassan
- Sorbonne Université, CNRS, PHysico-chimie des Electrolytes, Nanosystèmes InterfaciauX (PHENIX), F-75005 Paris, France
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9
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Bolteau B, Dos Santos K, Gélébart F, Gomes J, Teisseire J, Barthel E, Fresnais J. New Platform for Gravitational Microfluidic Using Ferrofluids. Langmuir 2019; 35:9133-9138. [PMID: 31144817 DOI: 10.1021/acs.langmuir.8b03423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Among the large variety of microfluidic platforms, surface devices are a world apart. Electrowetting systems are used to control the displacement of droplets among predetermined pathways. More confidential, superhydrophobic surfaces are more and more described as new elements to guide spherical droplet reactors. As such, they can exhibit confinement properties analogous to channel-based microfluidics. In this article, we describe a new strategy to use superhydrophobic surfaces as a permanently tilted microfluidic platform, on which droplets containing iron oxide nanoparticles are guided with permanent magnets. These droplets are fed with water through a capillary tube until their weight exceeds the magnetic field force. Thus, the volume at which the droplet rolls off the surface is only governed by the initial quantity of magnetic nanoparticles and the tilting angle of the surface. This phenomenon provides a strategy for droplet dilution in a simple and reproducible manner, which is not that easy in microchannels, and a key advantage of open systems. As a proof of concept, we used this platform to prepare magnetic filaments by a salting-out process already described in large batches. By reducing salt concentration on the platform, we are able to control the electrostatic attractive interactions between iron oxide nanoparticles coated with poly(acrylic acid) and a positively charged polyelectrolyte [poly(diallyldimethylammonium chloride)]. The formation of nanostructured filaments was conducted in 2 min while more than 30 min was required for dialysis. Our results also illustrate the power of microfluidic reaction processes because such magnetic filaments could not be obtained through direct batch dilution because of mixing issues. Such microfluidic platforms could be useful for the efficient and simple dilution of systems where reactivity is controlled by concentration.
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Affiliation(s)
- Blandine Bolteau
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX-UMR 8234 , F-75252 Paris Cedex 05 , France
- Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, CNRS, Sorbonne Université , 75005 Paris , France
- Surface du Verre et Interfaces, UMR 125 CNRS/Saint-Gobain , 39 Quai Lucien Lefranc , F-93303 Aubervilliers Cedex , France
| | - Kevin Dos Santos
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX-UMR 8234 , F-75252 Paris Cedex 05 , France
| | - Frédéric Gélébart
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX-UMR 8234 , F-75252 Paris Cedex 05 , France
| | - José Gomes
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX-UMR 8234 , F-75252 Paris Cedex 05 , France
| | - Jérémie Teisseire
- Surface du Verre et Interfaces, UMR 125 CNRS/Saint-Gobain , 39 Quai Lucien Lefranc , F-93303 Aubervilliers Cedex , France
| | - Etienne Barthel
- Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, CNRS, Sorbonne Université , 75005 Paris , France
| | - Jérôme Fresnais
- Sorbonne Université, CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX-UMR 8234 , F-75252 Paris Cedex 05 , France
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Cazares-Cortes E, Cabana S, Boitard C, Nehlig E, Griffete N, Fresnais J, Wilhelm C, Abou-Hassan A, Ménager C. Recent insights in magnetic hyperthermia: From the "hot-spot" effect for local delivery to combined magneto-photo-thermia using magneto-plasmonic hybrids. Adv Drug Deliv Rev 2019; 138:233-246. [PMID: 30414493 DOI: 10.1016/j.addr.2018.10.016] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/21/2018] [Accepted: 10/31/2018] [Indexed: 12/25/2022]
Abstract
Magnetic hyperthermia which exploits the heat generated by magnetic nanoparticles (MNPs) when exposed to an alternative magnetic field (AMF) is now in clinical trials for the treatment of cancers. However, this thermal therapy requires a high amount of MNPs in the tumor to be efficient. On the contrary the hot spot local effect refers to the use of specific temperature profile at the vicinity of nanoparticles for heating with minor to no long-range effect. This magneto-thermal effect can be exploited as a relevant external stimulus to temporally and spatially trigger drug release. In this review, we focus on recent advances in magnetic hyperthermia. Indirect experimental proofs of the local temperature increase are first discussed leading to a good estimation of the temperature at the surface (from 0.5 to 6 nm) of superparamagnetic NPs. Then we highlight recent studies illustrating the hot-spot effect for drug-release. Finally, we present another recent strategy to enhance the efficacity of thermal treatment by combining photothermal therapy with magnetic hyperthermia mediated by magneto-plasmonic nanoplatforms.
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11
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Cazares-Cortes E, Nerantzaki M, Fresnais J, Wilhelm C, Griffete N, Ménager C. Magnetic Nanoparticles Create Hot Spots in Polymer Matrix for Controlled Drug Release. Nanomaterials (Basel) 2018; 8:nano8100850. [PMID: 30340389 PMCID: PMC6215271 DOI: 10.3390/nano8100850] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/09/2018] [Accepted: 10/11/2018] [Indexed: 12/24/2022]
Abstract
Herein, original magnetic drug delivery nanomaterials for cancer therapy are developed and compared, with the purpose to show active control over drug release by using an alternative magnetic field (AMF). The rationale is to combine polymers and superparamagnetic nanoparticles to trigger such drug release under AMF. Two magnetic nanosystems are thus presented: magnetic nanogels made of thermosensitive and biocompatible polymers and core-shell nanoparticles with a magnetic core and a molecularly imprinted polymer as shell. Both encapsulate doxorubicin (DOX) and the DOX controlled release was investigated in vitro and in cells under AMF excitation. It confirms that the local heat profile at the vicinity of the iron oxide core can be used for the DOX controlled release. It also shows that both nanosystems help delivering more DOX inside the cells compared to internalization of free DOX. Finally, the DOX intracellular release could be remotely triggered under AMF, in athermal conditions, thus enhancing DOX cytotoxicity.
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Affiliation(s)
- Esther Cazares-Cortes
- Sorbonne Université, CNRS, PHysico-Chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, F-75005 Paris, France.
| | - Maria Nerantzaki
- Sorbonne Université, CNRS, PHysico-Chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, F-75005 Paris, France.
| | - Jérôme Fresnais
- Sorbonne Université, CNRS, PHysico-Chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, F-75005 Paris, France.
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057, CNRS and Université Paris Diderot, 75205 Paris CEDEX 05, France.
| | - Nébéwia Griffete
- Sorbonne Université, CNRS, PHysico-Chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, F-75005 Paris, France.
| | - Christine Ménager
- Sorbonne Université, CNRS, PHysico-Chimie des Electrolytes et Nanosystèmes InterfaciauX, PHENIX, F-75005 Paris, France.
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12
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Affiliation(s)
- Jérôme Fresnais
- CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux (PHENIX), Sorbonne Université, Paris, France
| | - QianQian Ma
- CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux (PHENIX), Sorbonne Université, Paris, France
| | - Linda Thai
- CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux (PHENIX), Sorbonne Université, Paris, France
| | - Patrice Porion
- CNRS, Laboratoire Interfaces, Confinement, Matériaux et Nanostructures (ICMN), Université d’Orléans, Orléans, France
| | - Pierre Levitz
- CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux (PHENIX), Sorbonne Université, Paris, France
| | - Anne-Laure Rollet
- CNRS, Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux (PHENIX), Sorbonne Université, Paris, France
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13
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Kanzaki R, Guibert C, Fresnais J, Peyre V. Dispersion mechanism of polyacrylic acid-coated nanoparticle in protic ionic liquid, N,N-diethylethanolammonium trifluoromethanesulfonate. J Colloid Interface Sci 2018; 516:248-253. [DOI: 10.1016/j.jcis.2018.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/30/2017] [Accepted: 01/02/2018] [Indexed: 11/29/2022]
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Blin T, Niederberger A, Benyahia L, Fresnais J, Montembault V, Fontaine L. Thermoresponsive hybrid double-crosslinked networks using magnetic iron oxide nanoparticles as crossing points. Polym Chem 2018. [DOI: 10.1039/c8py01006d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Preparation and characterization of stimuli-sensitive hybrid double-crosslinked hydrogels based on iron oxide nanoparticles as the nano-crosslinkers and a difuran-functionalized PEO as the diene partner for the thermoreversible Diels–Alder reaction.
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Affiliation(s)
- Thomas Blin
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Antoine Niederberger
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Lazhar Benyahia
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Jérôme Fresnais
- Laboratoire de Physico-chimie des Electrolytes et Nanosystèmes Interfaciaux (PHENIX)
- UMR 8234 CNRS
- Sorbonne Université
- 75252 Paris Cedex 05
- France
| | - Véronique Montembault
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Laurent Fontaine
- Institut des Molécules et Matériaux du Mans (IMMM)
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
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15
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Mouhli A, Ayeb H, Othman T, Fresnais J, Dupuis V, Nemitz IR, Pendery JS, Rosenblatt C, Sandre O, Lacaze E. Influence of a dispersion of magnetic and nonmagnetic nanoparticles on the magnetic Fredericksz transition of the liquid crystal 5CB. Phys Rev E 2017; 96:012706. [PMID: 29347110 DOI: 10.1103/physreve.96.012706] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Indexed: 06/07/2023]
Abstract
A long time ago, Brochard and de Gennes predicted the possibility of significantly decreasing the critical magnetic field of the Fredericksz transition (the magnetic Fredericksz threshold) in a mixture of nematic liquid crystals and ferromagnetic particles, the so-called ferronematics. This phenomenon is rarely measured to be large, due to soft homeotropic anchoring induced at the nanoparticle surface. Here we present an optical study of the magnetic Fredericksz transition combined with a light scattering study of the classical nematic liquid crystal: the pentylcyanobiphenyl (5CB), doped with 6 nm diameter magnetic and nonmagnetic nanoparticles. Surprisingly, for both nanoparticles, we observe at room temperature a net decrease of the threshold field of the Fredericksz transition at low nanoparticle concentrations, which appears associated with a coating of the nanoparticles by a brush of polydimethylsiloxane copolymer chains inducing planar anchoring of the director on the nanoparticle surface. Moreover, the magnetic Fredericksz threshold exhibits nonmonotonic behavior as a function of the nanoparticle concentration for both types of nanoparticles, first decreasing down to a value from 23% to 31% below that of pure 5CB, then increasing with a further increase of nanoparticle concentration. This is interpreted as an aggregation starting at around 0.02 weight fraction that consumes more isolated nanoparticles than those introduced when the concentration is increased above c=0.05 weight fraction (volume fraction 3.5×10^{-2}). This shows the larger effect of isolated nanoparticles on the threshold with respect to aggregates. From dynamic light scattering measurements we deduced that, if the decrease of the magnetic threshold when the nanoparticle concentration increases is similar for both kinds of nanoparticles, the origin of this decrease is different for magnetic and nonmagnetic nanoparticles. For nonmagnetic nanoparticles, the behavior may be associated with a decrease of the elastic constant due to weak planar anchoring. For magnetic nanoparticles there are non-negligible local magnetic interactions between liquid crystal molecules and magnetic nanoparticles, leading to an increase of the average order parameter. This magnetic interaction thus favors an easier liquid crystal director rotation in the presence of external magnetic field, able to reorient the magnetic moments of the nanoparticles along with the molecules.
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Affiliation(s)
- Ahmed Mouhli
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR99ES16 Laboratoire de Physique de la Matiere Molle et de la Modélisation Electromagnétique (LP3ME), 2092 Tunis, Tunisie
| | - Habib Ayeb
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR99ES16 Laboratoire de Physique de la Matiere Molle et de la Modélisation Electromagnétique (LP3ME), 2092 Tunis, Tunisie
| | - Tahar Othman
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR99ES16 Laboratoire de Physique de la Matiere Molle et de la Modélisation Electromagnétique (LP3ME), 2092 Tunis, Tunisie
| | - Jérôme Fresnais
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, F75005 Paris, France
| | - Vincent Dupuis
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8234, PHENIX, F75005 Paris, France
| | - Ian R Nemitz
- Dept. of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Joel S Pendery
- Dept. of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Charles Rosenblatt
- Dept. of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Olivier Sandre
- Univ. Bordeaux, Bordeaux INP, CNRS UMR5629, Laboratoire de Chimie des Polymères Organiques, F33607 Pessac, France
| | - Emmanuelle Lacaze
- Sorbonne Universités, UPMC Univ Paris 06, CNRS UMR 7588, Institut des Nano-Sciences de Paris (INSP), F75005 Paris, France
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Faucon A, Benhelli-Mokrani H, Fleury F, Dubreil L, Hulin P, Nedellec S, Doussineau T, Antoine R, Orlando T, Lascialfari A, Fresnais J, Lartigue L, Ishow E. Tuning the architectural integrity of high-performance magneto-fluorescent core-shell nanoassemblies in cancer cells. J Colloid Interface Sci 2016; 479:139-149. [PMID: 27388127 DOI: 10.1016/j.jcis.2016.06.064] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 06/24/2016] [Accepted: 06/27/2016] [Indexed: 01/21/2023]
Abstract
High-density nanoarchitectures, endowed with simultaneous fluorescence and contrast properties for MRI and TEM imaging, have been obtained using a simple self-assembling strategy based on supramolecular interactions between non-doped fluorescent organic nanoparticles (FON) and superparamagnetic nanoparticles. In this way, a high-payload core-shell structure FON@mag has been obtained, protecting the hydrophobic fluorophores from the surroundings as well as from emission quenching by the shell of magnetic nanoparticles. Compared to isolated nanoparticles, maghemite nanoparticles self-assembled as an external shell create large inhomogeneous magnetic field, which causes enhanced transverse relaxivity and exacerbated MRI contrast. The magnetic load of the resulting nanoassemblies is evaluated using magnetic sedimentation and more originally electrospray mass spectrometry. The role of the stabilizing agents (citrate versus polyacrylate anions) revealed to be crucial regarding the cohesion of the resulting high-performance magneto-fluorescent nanoassemblies, which questions their use after cell internalization as nanocarriers or imaging agents for reliable correlative light and electron microcopy.
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Affiliation(s)
- Adrien Faucon
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | | | - Fabrice Fleury
- UFIP-UMR CNRS 6204, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Laurence Dubreil
- Pan Ther-UMR 703, INRA-ONIRIS, Atlanpole-Chanterie, 44307 Nantes, France
| | - Philippe Hulin
- INSERM UMS 016-UMS CNRS 3556, 8 quai Moncousu, 44007 Nantes, France
| | - Steven Nedellec
- INSERM UMS 016-UMS CNRS 3556, 8 quai Moncousu, 44007 Nantes, France
| | - Tristan Doussineau
- Institut Lumière Matière-UMR CNRS 5306, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Rodolphe Antoine
- Institut Lumière Matière-UMR CNRS 5306, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Tomas Orlando
- Department of Physics, Università di Pavia, via Bassi, 27100 Pavia, Italy
| | - Alessandro Lascialfari
- Department of Physics, Università di Pavia, via Bassi, 27100 Pavia, Italy; Department of Physics, Università degli Studi di Milano and INSTM, via Celoria 16, 20133 Milano, Italy
| | - Jérôme Fresnais
- Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire PHENIX, 4 place Jussieu, 75005 Paris, France
| | - Lénaïc Lartigue
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Eléna Ishow
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France.
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17
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Caetano BL, Guibert C, Fini R, Fresnais J, Pulcinelli SH, Ménager C, Santilli CV. Magnetic hyperthermia-induced drug release from ureasil-PEO-γ-Fe2O3 nanocomposites. RSC Adv 2016. [DOI: 10.1039/c6ra08127d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A multifunctional hybrid material suitable for cancer therapy, combining stimuli-responsive properties for drug delivery and magnetic hyperthermia.
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Affiliation(s)
- B. L. Caetano
- Instituto de Química
- UNESP
- 14800-900 Araraquara
- Brazil
- Sorbonne Universités
| | - C. Guibert
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Laboratoire PHENIX
- F-75005 Paris
| | - R. Fini
- Instituto de Química
- UNESP
- 14800-900 Araraquara
- Brazil
| | - J. Fresnais
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Laboratoire PHENIX
- F-75005 Paris
| | | | - C. Ménager
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Laboratoire PHENIX
- F-75005 Paris
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18
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Griffete N, Fresnais J, Espinosa A, Wilhelm C, Bée A, Ménager C. Design of magnetic molecularly imprinted polymer nanoparticles for controlled release of doxorubicin under an alternative magnetic field in athermal conditions. Nanoscale 2015; 7:18891-18896. [PMID: 26515533 DOI: 10.1039/c5nr06133d] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An innovative magnetic delivery nanomaterial for triggered cancer therapy showing active control over drug release by using an alternative magnetic field is proposed. In vitro and In vivo release of doxorubicin (DOX) were investigated and showed a massive DOX release under an alternative magnetic field without temperature elevation of the medium.
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Affiliation(s)
- N Griffete
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire PHENIX, Case 51, 4 place Jussieu, F-75005 Paris, France.
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19
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Guibert C, Dupuis V, Fresnais J, Peyre V. Controlling nanoparticles dispersion in ionic liquids by tuning the pH. J Colloid Interface Sci 2015; 454:105-11. [DOI: 10.1016/j.jcis.2015.04.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 04/28/2015] [Indexed: 11/16/2022]
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20
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Vitorazi L, Ould-Moussa N, Sekar S, Fresnais J, Loh W, Chapel JP, Berret JF. Evidence of a two-step process and pathway dependency in the thermodynamics of poly(diallyldimethylammonium chloride)/poly(sodium acrylate) complexation. Soft Matter 2014; 10:9496-9505. [PMID: 25347132 DOI: 10.1039/c4sm01461h] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recent studies have pointed out the importance of polyelectrolyte assembly in the elaboration of innovative nanomaterials. Beyond their structures, many important questions on the thermodynamics of association remain unanswered. Here, we investigate the complexation between poly(diallyldimethylammonium chloride) (PDADMAC) and poly(sodium acrylate) (PANa) chains using a combination of three techniques: isothermal titration calorimetry (ITC), static and dynamic light scattering and electrophoresis. Upon addition of PDADMAC to PANa or vice-versa, the results obtained by the different techniques agree well with each other, and reveal a two-step process. The primary process is the formation of highly charged polyelectrolyte complexes of size 100 nm. The secondary process is the transition towards a coacervate phase made of rich and poor polymer droplets. The binding isotherms measured are accounted for using a phenomenological model that provides the thermodynamic parameters for each reaction. Small positive enthalpies and large positive entropies consistent with a counterion release scenario are found throughout this study. Furthermore, this work stresses the importance of the underestimated formulation pathway or mixing order in polyelectrolyte complexation.
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Affiliation(s)
- L Vitorazi
- Matière et Systèmes Complexes, UMR 7057 CNRS Université Denis Diderot Paris-VII, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France.
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21
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Faucon A, Maldiney T, Clément O, Hulin P, Nedellec S, Robard M, Gautier N, De Meulenaere E, Clays K, Orlando T, Lascialfari A, Fiorini-Debuisschert C, Fresnais J, Ishow E. Highly cohesive dual nanoassemblies for complementary multiscale bioimaging. J Mater Chem B 2014; 2:7747-7755. [DOI: 10.1039/c4tb01199f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Core–shell nanoarchitectures made of non-doped fluorescent organic platforms capped with magnetic nanoparticles display high bioimaging performances.
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Affiliation(s)
- Adrien Faucon
- CEISAM – UMR CNRS 6230
- Université de Nantes
- 44322 Nantes, France
| | - Thomas Maldiney
- Paris Cardiovascular Research Center – PARCC
- Université Paris Descartes
- INSERM U970
- 75015 Paris, France
| | - Olivier Clément
- Paris Cardiovascular Research Center – PARCC
- Université Paris Descartes
- INSERM U970
- 75015 Paris, France
| | | | | | | | | | - Evelien De Meulenaere
- Department of Chemistry
- KULeuven
- 3001 Heverlee, Belgium
- Department of Bioscience Engineering
- KULeuven
| | - Koen Clays
- Department of Chemistry
- KULeuven
- 3001 Heverlee, Belgium
| | - Tomas Orlando
- Department of Physics and INSTM
- Università di Pavia
- 27100 Pavia, Italy
| | | | | | - Jérôme Fresnais
- PECSA – UMR CNRS 7195
- Université Pierre et Marie Curie
- 75005 Paris, France
| | - Eléna Ishow
- CEISAM – UMR CNRS 6230
- Université de Nantes
- 44322 Nantes, France
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22
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N'Guyen TTT, Duong HTT, Basuki J, Montembault V, Pascual S, Guibert C, Fresnais J, Boyer C, Whittaker MR, Davis TP, Fontaine L. Functional Iron Oxide Magnetic Nanoparticles with Hyperthermia-Induced Drug Release Ability by Using a Combination of Orthogonal Click Reactions. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306724] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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N'Guyen TTT, Duong HTT, Basuki J, Montembault V, Pascual S, Guibert C, Fresnais J, Boyer C, Whittaker MR, Davis TP, Fontaine L. Functional Iron Oxide Magnetic Nanoparticles with Hyperthermia-Induced Drug Release Ability by Using a Combination of Orthogonal Click Reactions. Angew Chem Int Ed Engl 2013; 52:14152-6. [DOI: 10.1002/anie.201306724] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/24/2013] [Indexed: 11/07/2022]
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Fresnais J, Yan M, Courtois J, Bostelmann T, Bée A, Berret JF. Poly(acrylic acid)-coated iron oxide nanoparticles: quantitative evaluation of the coating properties and applications for the removal of a pollutant dye. J Colloid Interface Sci 2012; 395:24-30. [PMID: 23305885 DOI: 10.1016/j.jcis.2012.12.011] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 11/26/2012] [Accepted: 12/01/2012] [Indexed: 10/27/2022]
Abstract
In this work, 6-12 nm iron oxide nanoparticles were synthesized and coated with poly(acrylic acid) chains of molecular weight 2100 g mol(-1). Based on a quantitative evaluation of the dispersions, the bare and coated particles were thoroughly characterized. The number densities of polymers adsorbed at the particle surface and of available chargeable groups were found to be 1.9±0.3 nm(-2) and 26±4 nm(-2), respectively. Occurring via a multi-site binding mechanism, the electrostatic coupling leads to a solid and resilient anchoring of the chains. To assess the efficacy of the particles for pollutant remediation, the adsorption isotherm of methylene blue molecules, a model of pollutant, was determined. The excellent agreement between the predicted and the measured amounts of adsorbed dyes suggests that most carboxylates participate to the complexation and adsorption mechanisms. An adsorption of 830 mg g(-1) was obtained. This quantity compares well with the highest values available for this dye.
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Affiliation(s)
- J Fresnais
- Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques (PECSA), UMR 7195 CNRS-UPMC-ESPCI, Paris, France.
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Qi L, Fresnais J, Muller P, Theodoly O, Berret JF, Chapel JP. Interfacial activity of phosphonated-PEG functionalized cerium oxide nanoparticles. Langmuir 2012; 28:11448-11456. [PMID: 22794100 DOI: 10.1021/la302173g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In a recent publication, we have highlighted the potential of phosphonic acid terminated PEG oligomers to functionalize strong UV absorption cerium oxide nanoparticles, which yield suspensions that are stable in aqueous or organic solvents and are redispersible in different solvents after freeze-drying. In the present work, we highlight the interfacial activity of the functional ceria nanoparticles and their potential to modify hydrophobic surfaces. We first investigated the phosphonated-PEG amphiphilic oligomers behavior as strong surface active species forming irreversibly adsorbed layers. We then show that the oligomers interfacial properties translate to the functional nanoparticles. In particular, the addition of a small fraction of phosphonated-PEG oligomers with an extra C16 aliphatic chain (stickers) into the formulation enabled the tuning of (i) the nanoparticles adsorption at the air/water, polystyrene/water, oil/water interfaces and (ii) the particle/particle interaction in aqueous solutions. We also found that dense and closely packed two-dimensional monolayers of nanoceria can be formed by spontaneous adsorption or surface compression using a Langmuir trough. A hexagonal organization controlled by reversible and repulsive interaction has been characterized by GISAXS. Mono- or multilayers can also be stably formed or transferred on solid surfaces. Our results are key features in the field of polymer surface modification, solid-stabilized emulsions (Pickering), or supracolloidal assemblies.
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Affiliation(s)
- L Qi
- Complex Assemblies of Soft Matter Laboratory (COMPASS)-CNRS UMI3254, Rhodia Center for Research and Technology in Bristol, Bristol, Pennsylvania 19007, United States
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Vuong QL, Berret JF, Fresnais J, Gossuin Y, Sandre O. A universal scaling law to predict the efficiency of magnetic nanoparticles as MRI T(2)-contrast agents. Adv Healthc Mater 2012. [PMID: 23184784 DOI: 10.1002/adhm.201200078] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Magnetic particles are very efficient magnetic resonance imaging (MRI) contrast agents. In recent years, chemists have unleashed their imagination to design multi-functional nanoprobes for biomedical applications including MRI contrast enhancement. This study is focused on the direct relationship between the size and magnetization of the particles and their nuclear magnetic resonance relaxation properties, which condition their efficiency. Experimental relaxation results with maghemite particles exhibiting a wide range of sizes and magnetizations are compared to previously published data and to well-established relaxation theories with a good agreement. This allows deriving the experimental master curve of the transverse relaxivity versus particle size and to predict the MRI contrast efficiency of any type of magnetic nanoparticles. This prediction only requires the knowledge of the size of the particles impermeable to water protons and the saturation magnetization of the corresponding volume. To predict the T(2) relaxation efficiency of magnetic single crystals, the crystal size and magnetization - obtained through a single Langevin fit of a magnetization curve - is the only information needed. For contrast agents made of several magnetic cores assembled into various geometries (dilute fractal aggregates, dense spherical clusters, core-shell micelles, hollow vesicles…), one needs to know a third parameter, namely the intra-aggregate volume fraction occupied by the magnetic materials relatively to the whole (hydrodynamic) sphere. Finally a calculation of the maximum achievable relaxation effect - and the size needed to reach this maximum - is performed for different cases: maghemite single crystals and dense clusters, core-shell particles (oxide layer around a metallic core) and zinc-manganese ferrite crystals.
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Affiliation(s)
- Quoc L Vuong
- Université de Mons, Biological Physics Department, 20 Place du Parc, 7000 Mons, Belgium
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Yan M, Fresnais J, Sekar S, Chapel JP, Berret JF. Magnetic nanowires generated via the waterborne desalting transition pathway. ACS Appl Mater Interfaces 2011; 3:1049-1054. [PMID: 21401080 DOI: 10.1021/am101188y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report a simple and versatile waterborne synthesis of magnetic nanowires following the innovative concept of electrostatic "desalting transition". Highly persistent superparamagnetic nanowires are generated from the controlled assembly of oppositely charged nanoparticles and commercially available polyelectrolytes. The wires have diameters around 200 nm and lengths between 1 μm and 0.5 mm, with either positive or negative charges on their surface. Beyond, we show that this soft-chemistry assembly approach is a general phenomenon independent of the feature of the macromolecular building blocks, opening significant perspectives for the design of multifunctional materials.
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Affiliation(s)
- M Yan
- Matière et Systèmes Complexes, UMR 7057 CNRS, Université Denis Diderot Paris-VII , Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris, France
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Breton M, Prével G, Audibert JF, Pansu R, Tauc P, Pioufle BL, Français O, Fresnais J, Berret JF, Ishow E. Solvatochromic dissociation of non-covalent fluorescent organic nanoparticles upon cell internalization. Phys Chem Chem Phys 2011; 13:13268-76. [DOI: 10.1039/c1cp20877b] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fresnais J, Ishow E, Sandre O, Berret JF. Electrostatic co-assembly of magnetic nanoparticles and fluorescent nanospheres: a versatile approach towards bimodal nanorods. Small 2009; 5:2533-2536. [PMID: 19676076 DOI: 10.1002/smll.200900703] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Jérôme Fresnais
- Laboratoire de Physico-chimie des Electrolytes, Colloïdes et Sciences Analytiques, UMR 7195, UPMC Univ Paris 6/CNRS/ESPCI, 4 place Jussieu, 75252 Paris Cedex 05, France
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Chanteau B, Fresnais J, Berret JF. Electrosteric enhanced stability of functional sub-10 nm cerium and iron oxide particles in cell culture medium. Langmuir 2009; 25:9064-9070. [PMID: 19572532 DOI: 10.1021/la900833v] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Applications of nanoparticles in biology require that the nanoparticles remain stable in solutions containing high concentrations of proteins and salts, as well as in cell culture media. In this work, we developed simple protocols for the coating of sub-10 nm nanoparticles and evaluated the colloidal stability of dispersions in various environments. Ligands (citric acid), oligomers [phosphonate-terminated poly(ethylene oxide)], and polymers [poly(acrylic acid)] were used as nanometer-thick adlayers for cerium (CeO2) and iron (gamma-Fe2O3) oxide nanoparticles. The organic functionalities were adsorbed on the particle surfaces via physical (electrostatic) forces. Stability assays at high ionic strengths and in cell culture media were performed by static and dynamic light scattering. Of the three coatings examined, we found that only poly(acrylic acid) fully preserved the dispersion stability over the long term (longer than weeks). The improved stability was explained by the multipoint attachments of the chains onto the particle surface and by the adlayer-mediated electrosteric interactions. These results suggest that anionically charged polymers represent an effective alternative to conventional coating agents.
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Affiliation(s)
- B Chanteau
- Matière et Systèmes Complexes, UMR 7057 CNRS Université Denis Diderot Paris-VII, Bâtiment Condorcet, 10 rue Alice Domon et Leonie Duquet, F-75205 Paris, France
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Fresnais J, Berret JF, Qi L, Chapel JP, Castaing JC, Sandre O, Frka-Petesic B, Perzynski R, Oberdisse J, Cousin F. Universal scattering behavior of coassembled nanoparticle-polymer clusters. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 78:040401. [PMID: 18999367 DOI: 10.1103/physreve.78.040401] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2008] [Revised: 09/09/2008] [Indexed: 05/27/2023]
Abstract
Water-soluble clusters made from 7-nm inorganic nanoparticles have been investigated by small-angle neutron scattering. The internal structure factor of the clusters was derived and exhibited a universal behavior as evidenced by a correlation hole at intermediate wave vectors. Reverse Monte Carlo calculations were performed to adjust the data and provided an accurate description of the clusters in terms of interparticle distance and volume fraction. Additional parameters influencing the microstructure were also investigated, including the nature and thickness of the nanoparticle adlayer.
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Affiliation(s)
- J Fresnais
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057 CNRS & Université Paris Diderot, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, Paris, France
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Qi L, Sehgal A, Castaing JC, Chapel JP, Fresnais J, Berret JF, Cousin F. Redispersible hybrid nanopowders: cerium oxide nanoparticle complexes with phosphonated-PEG oligomers. ACS Nano 2008; 2:879-88. [PMID: 19206484 DOI: 10.1021/nn700374d] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Rare earth cerium oxide (ceria) nanoparticles are stabilized using end-functional phosphonated-PEG oligomers. The complexation process and structure of the resulting hybrid core-shell singlet nanocolloids are described, characterized, and modeled using light and neutron scattering data. The adsorption mechanism is nonstoichiometric, yielding the number of adsorbed chains per particle N(ads) = 270 at saturation. Adsorption isotherms show a high affinity of the phosphonate head for the ceria surface (adsorption energy DeltaG(ads) approximately -16kT) suggesting an electrostatic driving force for the complexation. The ease, efficiency, and integrity of the complexation is highlighted by the formation of nanometric sized cerium oxide particles covered with a well anchored PEG layer, maintaining the characteristics of the original sol. This solvating brushlike layer is sufficient to solubilize the particles and greatly expand the stability range of the original sol (<pH 3) up to pH = 9. We underscore two key attributes of the tailored sol: (i) strong UV absorption capability after functionalization and (ii) ability to redisperse after freeze-drying as powder in aqueous or organic solvents in varying concentrations as singlet nanocolloids. This robust platform enables translation of intrinsic properties of mineral oxide nanoparticles to critical end use.
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Affiliation(s)
- Ling Qi
- Complex Fluid Laboratory, UMR CNRS/Rhodia 166, CRTB Rhodia Inc., 350 G. Patterson Boulevard, Bristol, Pennsylvania 19007, USA
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Qi L, Chapel JP, Castaing JC, Fresnais J, Berret JF. Organic versus hybrid coacervate complexes: co-assembly and adsorption properties. Soft Matter 2008; 4:577-585. [PMID: 32907224 DOI: 10.1039/b716178f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report the co-assembly and adsorption properties of coacervate complexes made from polyelectrolyte-neutral block copolymers and oppositely charged nanocolloids. The nanocolloids put under scrutiny were ionic surfactant micelles and highly charged 7 nm cerium oxide (CeO2) nanoparticles. Static and dynamic light scattering was used to investigate the microstructure and stability of the organic and hybrid complexes. For five different systems of nanocolloids and polymers, we first demonstrated that the electrostatic complexation resulted in the formation of stable core-shell aggregates in the 100 nm range. The microstructure of the CeO2-based complexes was resolved using cryogenic transmission electronic microscopy (Cryo-TEM), and it revealed that the cores were clusters made from densely packed nanoparticles, presumably through complexation of the polyelectrolyte blocks by the surface charges. The cluster stability was monitored by systematic light scattering measurements. In the concentration range of interest, c = 10-4-1 wt.%, the surfactant-based complexes were shown to exhibit a critical association concentration (cac) whereas the nanoparticle-polymer hybrids did not. The adsorption properties of the same complexes were investigated above the cac by stagnation point adsorption reflectometry. The adsorbed amount was measured as a function of time for polymers and complexes using anionically charged silica and hydrophobic poly(styrene) substrates. It was found that all complexes adsorbed readily on both types of substrates up to a level of 1-2 mg m-2 at stationary state. Upon rinsing however, the adsorbed layer was removed for the surfactant-based systems, but not for the cerium oxide clusters. As for the solution properties, these finding were interpreted in terms of a critical association concentrations, which are very different for organic and hybrid complexes. Combining the efficient adsorption and strong stability of the CeO2-based core-shell hybrids on various substrates, it is finally suggested that these systems could be used appropriately for coating and anti-biofouling applications.
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Affiliation(s)
- Ling Qi
- Complex Fluid Laboratory, UMR CNRS/Rhodia 166, Rhodia North-America, R&D Headquarters CRTB, 350 George Patterson Blvd, Bristol, PA 19007, USA
| | - Jean-Paul Chapel
- Complex Fluid Laboratory, UMR CNRS/Rhodia 166, Rhodia North-America, R&D Headquarters CRTB, 350 George Patterson Blvd, Bristol, PA 19007, USA
| | - Jean-Christophe Castaing
- Complex Fluid Laboratory, UMR CNRS/Rhodia 166, Rhodia North-America, R&D Headquarters CRTB, 350 George Patterson Blvd, Bristol, PA 19007, USA
| | - Jérôme Fresnais
- Matière et Systèmes Complexes, UMR 7057 CNRS Université Denis Diderot Paris-VII, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, Paris 75205, France.
| | - Jean-François Berret
- Matière et Systèmes Complexes, UMR 7057 CNRS Université Denis Diderot Paris-VII, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, Paris 75205, France.
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Qi L, Chapel JP, Castaing JC, Fresnais J, Berret JF. Stability and adsorption properties of electrostatic complexes: design of hybrid nanostructures for coating applications. Langmuir 2007; 23:11996-11998. [PMID: 17949119 DOI: 10.1021/la702074j] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report the presence of a correlation between the bulk and interfacial properties of electrostatic coacervate complexes. Complexes were obtained by co-assembly between cationic-neutral diblocks and oppositely charged surfactant micelles or 7 nm cerium oxide nanoparticles. Light scattering and reflectometry measurements revealed that the hybrid nanoparticle aggregates were more stable through both dilution and rinsing (from either a polystyrene or a silica surface) than their surfactant counterparts. These findings were attributed to a marked difference in critical association concentration between the two systems and to the frozen state of the hybrid structures.
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Affiliation(s)
- Ling Qi
- Complex Fluid Laboratory, UMR CNRS/Rhodia 166, Rhodia North-America, R&D Headquarters CRTB, 350 George Patterson Boulevard, Bristol, PA 19007, USA
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Fresnais J, Benyahia L, Poncin-Epaillard F. Dynamic (de)wetting properties of superhydrophobic plasma-treated polyethylene surfaces. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2235] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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