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Xing Y, Li Q, Chen X, Li M, Wang S, Li Y, Wang T, Sun X, Li X. Preparation of isoelectric point-switchable polymer brush-grafted mesoporous silica using RAFT polymerization with high performance for Ni(II) adsorption. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Cantarano A, Yao J, Matulionyte M, Lifante J, Benayas A, Ortgies DH, Vetrone F, Ibanez A, Gérardin C, Jaque D, Dantelle G. Autofluorescence-Free In Vivo Imaging Using Polymer-Stabilized Nd 3+-Doped YAG Nanocrystals. ACS APPLIED MATERIALS & INTERFACES 2020; 12:51273-51284. [PMID: 33156603 DOI: 10.1021/acsami.0c15514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Neodymium-doped yttrium aluminum garnet (YAG:Nd3+) has been widely developed during roughly the past 60 years and has been an outstanding fluorescent material. It has been considered as the gold standard among multipurpose solid-state lasers. Yet, the successful downsizing of this system into the nanoregimen has been elusive, so far. Indeed, the synthesis of a garnet structure at the nanoscale, with enough crystalline quality for optical applications, was found to be quite challenging. Here, we present an improved solvothermal synthesis method producing YAG:Nd3+ nanocrystals of remarkably good structural quality. Adequate surface functionalization using asymmetric double-hydrophilic block copolymers, constituted of a metal-binding block and a neutral water-soluble block, provides stabilized YAG:Nd3+ nanocrystals with long-term colloidal stability in aqueous suspensions. These newly stabilized nanoprobes offer spectroscopic quality (long lifetimes, narrow emission lines, and large Stokes shifts) close to that of bulk YAG:Nd3+. The narrow emission lines of YAG:Nd3+ nanocrystals are exploited by differential infrared fluorescence imaging, thus achieving an autofluorescence-free in vivo readout. In addition, nanothermometry measurements, based on the ratiometric fluorescence of the stabilized YAG:Nd3+ nanocrystals, are demonstrated. The progress here reported paves the way for the implementation of this new stabilized YAG:Nd3+ system in the preclinical arena.
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Affiliation(s)
- Alexandra Cantarano
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Jingke Yao
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
| | - Marija Matulionyte
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, 1650 Boul. Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada
| | - José Lifante
- Fluorescence Imaging Group, Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Avda. Arzobispo Morcillo, 2, Madrid 28029, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Antonio Benayas
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Dirk H Ortgies
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Fiorenzo Vetrone
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, 1650 Boul. Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada
| | - Alain Ibanez
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Corine Gérardin
- ICGM, Univ. Montpellier, CNRS UMR 5253, ENSCM, 240 Avenue E. Jeanbrau, 34296 Montpellier cedex 5, France
| | - Daniel Jaque
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Géraldine Dantelle
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
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Molina E, Warnant J, Mathonnat M, Bathfield M, In M, Laurencin D, Jérôme C, Lacroix-Desmazes P, Marcotte N, Gérardin C. Drug-Polymer Electrostatic Complexes as New Structuring Agents for the Formation of Drug-Loaded Ordered Mesoporous Silica. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:12839-12844. [PMID: 26566256 DOI: 10.1021/acs.langmuir.5b03221] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Using aminoglycoside antibiotics as drug models, it was shown that electrostatic complexes between hydrophilic drugs and oppositely charged double-hydrophilic block copolymers can form ordered mesophases. This phase behavior was evidenced by using poly(acrylic acid)-block-poly(ethylene oxide) block copolymers in the presence of silica precursors, and this allowed preparing drug-loaded mesoporous silica directly from the drug-polymer complexes. The novel synthetic strategy of the hybrid materials is highly efficient, avoiding waste and multistep processes; it also ensures optimal drug loading and provides pH-dependence of the drug release from the materials.
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Affiliation(s)
- Emilie Molina
- Institut Charles Gerhardt UMR 5253 CNRS/ENSCM/UM, ENSCM, Montpellier F-34295 Cedex, France
| | - Jérôme Warnant
- Institut Charles Gerhardt UMR 5253 CNRS/ENSCM/UM, ENSCM, Montpellier F-34295 Cedex, France
- CERM, University of Liege , Sart Tilman, B-4000 Liege, Belgium
| | - Mélody Mathonnat
- Institut Charles Gerhardt UMR 5253 CNRS/ENSCM/UM, ENSCM, Montpellier F-34295 Cedex, France
| | - Maël Bathfield
- Institut Charles Gerhardt UMR 5253 CNRS/ENSCM/UM, ENSCM, Montpellier F-34295 Cedex, France
| | - Martin In
- Laboratory Charles Coulomb, UMR 5221 CNRS/UM, University of Montpellier , F-34095 Montpellier Cedex 5, France
| | - Danielle Laurencin
- Institut Charles Gerhardt UMR 5253 CNRS/ENSCM/UM, ENSCM, Montpellier F-34295 Cedex, France
| | | | | | - Nathalie Marcotte
- Institut Charles Gerhardt UMR 5253 CNRS/ENSCM/UM, ENSCM, Montpellier F-34295 Cedex, France
| | - Corine Gérardin
- Institut Charles Gerhardt UMR 5253 CNRS/ENSCM/UM, ENSCM, Montpellier F-34295 Cedex, France
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Bathfield M, Warnant J, Gérardin C, Lacroix-Desmazes P. Asymmetric neutral, cationic and anionic PEO-based double-hydrophilic block copolymers (DHBCs): synthesis and reversible micellization triggered by temperature or pH. Polym Chem 2015. [DOI: 10.1039/c4py01502a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The syntheses of three DHBCs (thermosensitive or ionizable) are described. To act as structure directing agents in mesoporous silica synthesis, their ability to undergo micellization under appropriate conditions was checked.
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Affiliation(s)
- Maël Bathfield
- Ingénierie et Architectures Macromoléculaires (ICG-IAM)
- Institut Charles Gerhardt - UMR 5253 CNRS/UM2/ENSCM/UM1
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier Cedex 5
- France
| | - Jérôme Warnant
- Ingénierie et Architectures Macromoléculaires (ICG-IAM)
- Institut Charles Gerhardt - UMR 5253 CNRS/UM2/ENSCM/UM1
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier Cedex 5
- France
| | - Corine Gérardin
- Matériaux Avancés pour la Catalyse et la Santé (ICG-MACS)
- Institut Charles Gerhardt - UMR 5253 CNRS/UM2/ENSCM/UM1
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier Cedex 5
- France
| | - Patrick Lacroix-Desmazes
- Ingénierie et Architectures Macromoléculaires (ICG-IAM)
- Institut Charles Gerhardt - UMR 5253 CNRS/UM2/ENSCM/UM1
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier Cedex 5
- France
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Sanson N, Bouyer F, Destarac M, In M, Gérardin C. Hybrid polyion complex micelles formed from double hydrophilic block copolymers and multivalent metal ions: size control and nanostructure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3773-3782. [PMID: 22242909 DOI: 10.1021/la204562t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Hybrid polyion complex (HPIC) micelles are nanoaggregates obtained by complexation of multivalent metal ions by double hydrophilic block copolymers (DHBC). Solutions of DHBC such as the poly(acrylic acid)-block-poly(acrylamide) (PAA-b-PAM) or poly(acrylic acid)-block-poly(2-hydroxyethylacrylate) (PAA-b-PHEA), constituted of an ionizable complexing block and a neutral stabilizing block, were mixed with solutions of metal ions, which are either monoatomic ions or metal polycations, such as Al(3+), La(3+), or Al(13)(7+). The physicochemical properties of the HPIC micelles were investigated by small angle neutron scattering (SANS) and dynamic light scattering (DLS) as a function of the polymer block lengths and the nature of the cation. Mixtures of metal cations and asymmetric block copolymers with a complexing block smaller than the stabilizing block lead to the formation of stable colloidal HPIC micelles. The hydrodynamic radius of the HPIC micelles varies with the polymer molecular weight as M(0.6). In addition, the variation of R(h) of the HPIC micelle is stronger when the complexing block length is increased than when the neutral block length is increased. R(h) is highly sensitive to the polymer asymmetry degree (block weight ratio), and this is even more true when the polymer asymmetry degree goes down to values close to 3. SANS experiments reveal that HPIC micelles exhibit a well-defined core-corona nanostructure; the core is formed by the insoluble dense poly(acrylate)/metal cation complex, and the diffuse corona is constituted of swollen neutral polymer chains. The scattering curves were modeled by an analytical function of the form factor; the fitting parameters of the Pedersen's model provide information on the core size, the corona thickness, and the aggregation number of the micelles. For a given metal ion, the micelle core radius increases as the PAA block length. The radius of gyration of the micelle is very close to the value of the core radius, while it varies very weakly with the neutral block length. Nevertheless, the radius of gyration of the micelle is highly dependent on the asymmetry degree of the polymer: if the neutral block length increases in a large extent, the micelle radius of gyration decreases due to a decrease of the micelle aggregation number. The variation of the R(g)/R(h) ratio as a function of the polymer block lengths confirms the nanostructure associating a dense spherical core and a diffuse corona. Finally, the high stability of HPIC micelles with increasing concentration is the result of the nature of the coordination complex bonds in the micelle core.
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Affiliation(s)
- Nicolas Sanson
- Institut Charles Gerhardt, UMR 5253 CNRS/ENSCM/UM2/UM1, 8 Rue de L'Ecole Normale, 34296 Montpellier Cedex 5, France
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