This project studies chiral assembly of chromophores at nanoscale by using chirality-defined single-wall carbon nanotubes (SWCNTs) as templates. New findings at NIST have established a general strategy to assemble a wide variety of dye molecules on to nanotube surfaces. The atomic lattice of a SWCNT is expected to exert strong orienting force on the adsorbed dye molecules, thus making it possible to control the overall chirality of the coating chromophores. This project will investigate design rules governing chirally-defined molecular assembly, and explore new functions arising from interactions of the new chiral materials with polarized light.