title: Tunable single-walled carbon nanotube microstructure in the liquid and solid states using poly(acrylic acid).
abstract: Poly(acrylic acid) is shown to control the level of SWNT dispersion in aqueous mixtures and the state of dispersion in a solid composite. At low pH, PAA-stabilized suspensions containing 0.1 wt % SWNT have a waterlike viscosity, but this mixture thickens as the pH is raised. This behavior is reversed when pH is again lowered. Changing pH varies the SWNT microstructure between aggregated and well-exfoliated states, as evidenced by electron microscopy and electrical conductivity measurements.
authors: Department of Mechanical Engineering, Polymer Technology Center, Texas A and M University, College Station, Texas 77843-3123, USA. jgrunlan@tamu.edu
authors: Jaime C
authors: JC
authors: Grunlan
authors: Lei
authors: L
authors: Liu
authors: Yeon Seok
authors: YS
authors: Kim