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Small diameter single‐walled carbon nanotubes can be filled with carbon‐rich molecules if the latter are small enough. For HiPco tubes ferrocene turned out to be appropriate. After filling and high temperature treatment (transformation) new Raman lines are observed. Here we show that these lines appear also for small diameter DIPS tubes after similar temperature treatment and that all new lines originate...
Carbon‐rich fillers like ferrocene can be transformed into an inner tube with extremely small diameter if they are filled into HiPco tubes. For ferrocene@HiPco three new Raman bands appear in the D‐band region during this transformation. These bands do not show dispersion and exhibit a strong resonance for red laser excitation. The observed resonance is for the outgoing phonon at 1247 cm for an...
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