Fig. 3: Structural and dedoping characterizations of p-doped carbon nanotube materials.
From: Complex chemistry of carbon nanotubes toward efficient and stable p-type doping
a Scanning electron microscope images of the as-prepared and HNO3-doped CNT films. Scale bars correspond to the length of 1 μm. b Raman spectra of the CNT films before and after HNO3 doping. Spectra of the CNT samples doped with the other protonic acids are shown in Supplementary Fig. 2. Variations of (c) electrical conductivity (σ) and (d) Seebeck coefficient (S) upon repeated doping by HNO3 and dedoping by NaOH. Data statistics: n = 3. Error bars indicate the corresponding SDs.
