Arsonic Acid As a Robust Anchor Group for the Surface Modification of Fe3O4
| Autor: | Jin-Kyu Lee, Jihoon Ahn, Doo-Sik Moon |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Molecular Structure
Surface Properties Chemistry Arsonic acid Nanoparticle Surfaces and Interfaces Condensed Matter Physics Ferric Compounds Arsenicals Colloid chemistry.chemical_compound Chemical engineering Group (periodic table) Electrochemistry Nanoparticles Surface modification Organic chemistry General Materials Science Spectroscopy Iron oxide nanoparticles |
| Zdroj: | Langmuir. 29:14912-14918 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la402939r |
| Popis: | In order to use iron oxide nanoparticles (Fe3O4) in various applications, a surface modification that provides colloidal stability and additional functionality to the nanoparticles is necessary. For the modification of the nanoparticle surface with ligand molecules, the ligand molecule should contain an anchor group that has a strong affinity for the surface. However, currently used anchor groups have shown some problems such as low affinity and stability as well as reactivity with the surface. In this study, arsonic acid (RAsO(OH)2) was investigated as a novel anchor group. It was possible to introduce azide groups on the surface of iron oxide nanoparticles using 4-azidophenylarsonic acid, and the desired functional molecules could be chemically attached to the surface via copper-catalyzed azide-alkyne cycloaddition (click chemistry). By quantifying and comparing the amount of attached anchors on the surface, it was found that arsonic acid displays better affinity than other currently used anchors (catechol, carboxylic acid). Furthermore, we examined the binding reversibility, long-term anchoring stability, and anchoring stability at various pH values. It was revealed that arsonic acid is a stable anchor in various conditions. |
| Databáze: | OpenAIRE |
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