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Article Dans Une Revue Thin Solid Films Année : 2014

Structure in Nascent Carbon Nanotubes Revealed by Spatially Resolved Raman Spectroscopy

Résumé

The understanding of carbon nanotubes (CNT) growth is crucial for the control of their production. In particular, the identification of structural changes of carbon possibly occurring near the catalyst particle in the very early stages of their formation is of high interest. In this study, samples of nascent CNT obtained during nucleation step and samples of vertically aligned CNT obtained during growth step are analysed by combined spatially resolved Raman spectroscopy and X-Ray diffraction measurements. Spatially resolved Raman spectroscopy reveals that iron-based phases and carbon phases are co-localised at the same position, and indicates that sp2 carbon nucleates preferentially on iron-based particles during this nucleation step. Depth scan Raman spectroscopy analysis, performed on nascent CNT, highlights that carbon structural organisation is significantly changing from defective graphene layers surrounding the iron-based particles at their base up to multi-walled nanotube structures in the upper part of iron-based particles.
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Dates et versions

hal-01003939 , version 1 (10-06-2014)

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Perine Landois, Mathieu Pinault, Mickaël Huard, Valérie Reita, Stéphan Rouzière, et al.. Structure in Nascent Carbon Nanotubes Revealed by Spatially Resolved Raman Spectroscopy. Thin Solid Films, 2014, 568, pp.102-110. ⟨10.1016/j.tsf.2014.07.016⟩. ⟨hal-01003939⟩
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