By using several optical methods, dramatic improvement of dispersion of carbon nano-tubes (CNTs) in nematic liquid crystal (LC) E7 is found by adding a small amount (0.1wt.%) of Laponite particles modified with an ionic surfactant CTAB to the LC-CNT composite. This effect is explained by surrounding the nanotubes by Laponite particles that promoted their disaggregation. The enhanced dispersion of CNTs was accompanied with essential changes in electro-optical properties of the colloids, namely, in greatly improved optical transmittance and electro-optic contrast, as well as in reduction of Fredericks threshold.