Structured Assemblies of Ferromagnetic Particles through Covalent Immobilization on Functionalized Polymer Surfaces Obtained by Surface Segregation

Bousquet, Antoine; Ibarboure, Emmanuel; Labrugère, Christine; Papon, Eric; Rodriguez-Hernández, Juan

doi:10.1021/la700255e

Cited by 18 publications

(12 citation statements)

References 20 publications

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“…Series of PS‐ b ‐PAA block copolymers were prepared by two consecutive ATRP polymerization reaction steps in which the conditions employed were adapted to obtain block copolymers with variable composition (i.e., the percentage of acrylic acid units) and molar masses 29. The molecular characteristics of the block copolymers prepared are summarized in Table 1.…”

Section: Resultsmentioning

confidence: 99%

pH responsive surfaces with nanoscale topography

Bousquet

Ibarboure

Terán

et al. 2010

J. Polym. Sci. A Polym. Chem.

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We report the preparation of nanostructured adaptive polymer surfaces by diffusion of an amphihilic block copolymer toward the interface. The surface segregation of a diblock copolymer, polystyrene-block-poly(acrylic acid) (PS-b-PAA), occurred when blended with high molecular weight polystyrene employed as a matrix. On annealing, the polymer surfaces changed both the chemical composition and the hydrophilicity depending on the environment and pH, respectively. By exposure to either water vapor or air, the surface wettability varied between hydrophilic and hydrophobic. In addition, surface enrichment on diblock copolymer by water vapor annealing led to self-assembly occurring at the interface. Hence, nanostructured domains can be observed by AFM in liquid media. Moreover, the PAA segments placed at the interface respond to pH and can switch from an extended hydrophilic state at basic pH values to a collapsed hydrophobic state in acidic media. Accordingly, the surface morphology changed from swelled micelles to nanometer size holes. V C 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48:

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Section: Resultsmentioning

confidence: 99%

pH responsive surfaces with nanoscale topography

Bousquet

Ibarboure

Terán

et al. 2010

J. Polym. Sci. A Polym. Chem.

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“…Afterwards, the activated CPP-Co nanoparticles were organized over the functionalized gold surface following a two-step incubation process: 1) the functionalized gold surfaces were immersed in a buffer solution of CPP-Co nanoparticles at room temperature and 2) addition of NHS with overnight (ca. 18 h) stirring [16,17] and the following experimental conditions: 0.75 mg/mL CPP-Co, 0.25 mg/mL EDC, 0.15 mg/mL NHS, in sodium phosphate buffer (20 nM), at pH 9.0. SEM and AFM images of the functionalized gold surface, after several washes with ethanol, clearly evidence that nearly 85-90% of the substrate was covered with the nanoparticles (see Figure 2a -b).…”

Section: Insert Schemementioning

confidence: 99%

Covalent Grafting of Coordination Polymers on Surfaces: The Case of Hybrid Valence Tautomeric Interphases

González-Monje

Novio

Ruiz‐Molina

2015

Chemistry A European J

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We have developed a novel approach for grafting coordination polymers, structured as nanoparticles bearing surface reactive carboxylic groups, to amino-functionalized surfaces through a simple carbodiimide-mediated coupling reaction. As a proof-of concept to validate our approach and on the quest for novel hybrid interphases with potential technological applications, we have used valence tautomeric nanoparticles exhibiting spin transition around room temperature. SEM and AFM characterization reveal that the nanoparticles were organized chiefly into a single monolayer while XPS measurements confirm that the nanoparticles retain a temperature-induced electronic redistribution upon surface anchorage. Our results represent an effective approach towards the challenging manufacturing of coordination polymers.

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“…A different approach consists of the use of a functionalized polymer surface for the covalent immobilization of MNPs. For instance, a polystyrene polymer matrix containing –COOH functional groups was used for the carbodiimide‐mediated anchoring of γ ‐Fe 2 O 3 particles (∼200 nm) coated with an amino‐decorated polymeric shell 77. This procedure led to a single‐layer of randomly distributed particles on top of the polymeric film.…”

Section: Assisted Self‐assembly and Organizationmentioning

confidence: 99%

Structuration and Integration of Magnetic Nanoparticles on Surfaces and Devices

Bellido

Domingo

Ojea-Jiménez

et al. 2012

Small

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Different experimental approaches used for structuration of magnetic nanoparticles on surfaces are reviewed. Nanoparticles tend to organize on surfaces through self-assembly mechanisms controlled by non-covalent interactions which are modulated by their shape, size and morphology as well as by other external parameters such as the nature of the solvent or the capping layer. Further control on the structuration can be achieved by the use of external magnetic fields or other structuring techniques, mainly lithographic or atomic force microscopy (AFM)-based techniques. Moreover, results can be improved by chemical functionalization or the use of biological templates. Chemical functionalization of the nanoparticles and/or the surface ensures a proper stability as well as control of the formation of a (sub)monolayer. On the other hand, the use of biological templates facilitates the structuration of several families of nanoparticles, which otherwise may be difficult to form, simply by establishing the experimental conditions required for the structuration of the organic capsule. All these experimental efforts are directed ultimately to the integration of magnetic nanoparticles in sensors which constitute the future generation of hybrid magnetic devices.

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Structured Assemblies of Ferromagnetic Particles through Covalent Immobilization on Functionalized Polymer Surfaces Obtained by Surface Segregation

Cited by 18 publications

References 20 publications

pH responsive surfaces with nanoscale topography

pH responsive surfaces with nanoscale topography

Covalent Grafting of Coordination Polymers on Surfaces: The Case of Hybrid Valence Tautomeric Interphases

Structuration and Integration of Magnetic Nanoparticles on Surfaces and Devices

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