Figure 1.

Typical helical structures in CDLC system. (a) Low pitch helical ribbon with a pitch angle ψ = 11 ± 2°. (b) High pitch helical ribbons with a pitch angle ψ = 54 ± 2°. (c) Intermediate pitch helical ribbons with a pitch angle ψ = 40.8 ± 3.8°.