Transmission electron microscope (TEM) photographs of functionalized carbon nanotubes: A. low magnification (2.0 KV × 1,500, 10 um), B: high magnification (2.0 KV × 50,000, 100 nm) C: Inside multiwall nature of the carbon nanotube (10 nm inner diameter, 9 concentric walls, and a clear inner channel), D: Dispersed MWCNT after sonication.