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Amine-Functionalized Multi-Walled Carbon Nanotubes: An Atomic Force Microscopy Study

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1,8-Diaminooctane (DO), octadecylamine (ODA), polyethylene glycol diamine (PEGDA), and polyethylenimine (PEI) as organic amine reagents were employed for functionalizing pristine multi-walled carbon nanotubes (MWNTs). The morphology of the functionalized MWNTs was characterized by atomic force microscopy (AFM). The information obtained from AFM topography analysis evidences on wrapping MWNTs by the amines. On one hand, DO-MWNTs were found to be rigid structures, which can be explained by the covalent linking between functionalized nanotubes. ODA-MWNTs are very regular structures that do not form aggregates between each other. On the other hand, PEGDA-MWNTs composite exhibits larger structures (more than 2 m in length). PEI-MWNTs composite forms wide aggregates in which the clumping of nanotubes is highly ordered, whereas commonly known bundles are not observed at all.
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Document Type: Research Article

Publication date: 01 December 2009

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  • Scanning probe microscopy (SPM) typically covers atomic force microscopy (AFM), scanning tunneling microscopy (STM), near-field scanning optical microscopy (NSOM, or SNOM) and related technologies. Since its invention in early 1980s, SPM has now been regarded as one of the major driving forces for the rapid development of nanoscience and nanotechnology, and the tool of choice in many areas of research. Journal of Scanning Probe Microscopy (JSPM) provides a forum for rapid dissemination of important developments in SPM technology. JSPM offers scientists, engineers and developers timely, peer-reviewed research on SPM science and technology of the highest quality. JSPM publishes original rapid communications, full research papers and timely state-of-the-art reviews (with author's photo and biography) encompassing the fundamental and applied research on SPM in all fields of science, engineering, and medicine.
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