Effect of Dipolar Interactions on the Assembly Process of Iron Oxide Nanoparticles Promoted by the CuAAC 'Click' Chemistry Reaction
| Autor: | Yu-ting Lei, Céline Kiefer, Benoit P. Pichon, Mathias Dolci, Lise-Marie Lacroix, Sylvie Begin-Colin, Cédric Leuvrey |
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| Přispěvatelé: | Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Kinetics Iron oxide Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cycloaddition 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Nanomaterials chemistry.chemical_compound General Energy chemistry Click chemistry Magnetic nanoparticles [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics Physical and Theoretical Chemistry 0210 nano-technology Iron oxide nanoparticles |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2019, 123 (45), pp.27927-27936. ⟨10.1021/acs.jpcc.9b08135⟩ |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.9b08135 |
| Popis: | Nanoparticle assemblies are very attractive because they allow the fine-tuning of magnetic properties by taking advantage of collective behavior ruled by interparticle interactions. Nevertheless, great efforts to control the spatial arrangement of nanoparticles still have to be developed in order to integrate such nanomaterials in devices for applications in fields such as sensors and recording media. Herein, we report on the assembly of iron oxide magnetic nanoparticles promoted by copper-catalyzed alkyne-azide cycloaddition (CuAAC) “click” reaction. Azido-terminated nanoparticles were assembled onto alkyne-terminated gold substrates. The assembly mechanism was investigated by monitoring the density of nanoparticles as a function of their size and concentration. The kinetics of the assembly process is exponential and is favored by the increase of the nanoparticle size and of the concentration. We show that the assembly of nanoparticles is controlled by the random sequential adsorption (RSA) mechanism below a critical size. In contrast, large nanoparticles allow strong dipolar interactions which participate actively in the assembly process, thus they avoid the RSA pathway. These two different mechanism pathways have a significant influence on the spatial arrangement of nanoparticles. The RSA results in rather isolated small nanoparticles at the earliest reaction times which become gradually a discontinuous monolayer. In contrast, the dipolar interaction assisted RSA mechanism (DIA-RSA) favors linear or 2D small assemblies which quickly grow in tight-packed monolayers of nanoparticles. Finally, the magnetic collective properties of these assemblies are markedly favored by the increase of the nanoparticle size. |
| Databáze: | OpenAIRE |
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