| 초록 |
Lyotropic Liquid Crystals (LCs), formed by surfactants that self-assemble in rod- or disk-like micelles, are attractive hosts for carbon nanotubes (CNTs) because of the alignment control, achieved at macroscopic scale thus controlling the one-dimensional properties of CNTs. Surfactants are helpful for preventing CNT aggregation but their excess deteriorates CNT properties. We show that surfactant minimization is possible not only for the CNT dispersion but also for the formation of the organized composites, proving the CNT alignment by polarized Raman spectroscopy. Lyotropic LC phases can be also formed by CNTs or by graphene oxide in water. Because of the highly anisotropic shape the threshold for the formation of LC phases can be extremely low. Several factor influences the LC phase formation. We briefly introduce our work on the topic showing the optical characterization of the LC phase of graphene oxide at different concentrations, above and below the single phase region. |
