resumo
The chemical inertness of graphite and, in the case of tubes, of rolled up few layer graphene sheets, requires some degree of "defect engineering" for the fabrication of carbon based heterostructured materials. It is shown that atomic layer deposition provides a means to specifically label anchoring sites and can be used to characterize the surface functionality of differently treated carbon nanotubes. Direct observation of deposited titania by analytical transmission electron microscopy reveals the location and density of anchoring sites as well as structure related concentrations of functional groups on the surface of the tubes. Controlled functionalization of the tubes therefore allows us to tailor the distribution of deposited material and, hence, fabricate complex heterostructures.
palavras-chave
WALLED CARBON NANOTUBES; NANOPARTICLES; SPECTROSCOPY; NANOFIBERS; DEFECTS; PERFORMANCE; DECORATION; MICROSCOPY; CHEMISTRY
categoria
Chemistry; Materials Science
autores
Marichy, C; Tessonnier, JP; Ferro, MC; Lee, KH; Schlogl, R; Pinna, N; Willinger, MG
nossos autores
Nicola Pinna
InvestigadorGrupos
Projectos
Nanotubes and Nanowires based hybrid nanostructures (PTDC/CTM/098361/2008)
Structural and chemical characterization at the nanometer scale (PTDC/CTM/100468/2008)
RMNE-UA-National Network of Electron Microscopy (REDE/1509/RME/2005 )
agradecimentos
This work was partially supported by the WCU (World Class University) program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science and Technology (R31-10013) and FCT projects (PTDC/CTM/098361/2008), (PTDC/CTM/100468/2008), (REDE/1509/RME/2005) and (SFRH/BD/71453/2010).