Fig. 1
From: Preparation and Transport Performances of High-Density, Aligned Carbon Nanotube Membranes
Characterization of the CNT arrays. a Cross-sectional SEM image of the VACNT array with 1 mm in thickness. b SEM image of the VACNT array surface under high-resolution magnification. c, d Cross-sectional SEM images of VACNT arrays before and after rolling down, respectively. e A representative TEM image for the determination of the CNT diameter, showing an inner diameter of about 5 nm. f Raman spectra of the VACNT membrane before and after rolling down