Figure 1 | Scientific Reports

Figure 1

From: Long-term biopersistence of tangled oxidized carbon nanotubes inside and outside macrophages in rat subcutaneous tissue

Figure 1

Characterization of t-ox-MWCNTs used in this study.

(a) HRTEM image, (b) FT-IR spectrum and (c) Raman scattering spectrum of t-ox-MWCNTs. (d) ESR signals observed in the absence (top) and presence (bottom) of t-ox-MWCNTs. The signal intensity is proportional to the amount of the ·OH free radical generated by the Fenton reaction in solution. No signal was observed in the presence of t-ox-MWCNTs, which suggests that t-ox-MWCNTs possess scavenging activity. The HRTEM image is representative of greater than 100 independent observation areas. The FT-IR, Raman scattering and ESR spectra are representative of three, ten and two independent experiments, respectively.

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