Functionalization of surfactant wrapped graphenenanosheets with alkylazides for enhanced dispersibility
| Autor: | Yong Ping Zhang, Suresh Valiyaveettil, Sajini Vadukumpully, Jhinuk Gupta, Guo Qin Xu |
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| Rok vydání: | 2011 |
| Předmět: |
Azides
Materials science Graphene Composite number Metal Nanoparticles Infrared spectroscopy Nanotechnology Nanostructures law.invention Nanomaterials Surface-Active Agents law Transmission electron microscopy Colloidal gold Surface modification Graphite Spectrophotometry Ultraviolet General Materials Science Gold Scanning tunneling microscope |
| Zdroj: | Nanoscale. 3:303-308 |
| ISSN: | 2040-3372 2040-3364 |
| DOI: | 10.1039/c0nr00547a |
| Popis: | A facile and simple approach for the covalent functionalization of surfactant wrapped graphene sheets is described. The approach involves functionalization of dispersible graphene sheets with various alkylazides and 11-azidoundecanoic acid proved the best azide for enhanced dispersibility. The functionalization was confirmed by infrared spectroscopy and scanning tunneling microscopy. The free carboxylic acid groups can bind to gold nanoparticles, which were introduced as markers for the reactive sites. The interaction between gold nanoparticles and the graphene sheets was followed by UV-vis spectroscopy. The gold nanoparticle-graphene composite was characterized by transmission electron microscopy and atomic force microscopy, demonstrating the uniform distribution of gold nanoparticles all over the surface. Our results open the possibility to control the functionalization on graphene in the construction of composite nanomaterials. |
| Databáze: | OpenAIRE |
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