Fig. 1. Experimental materials and cell preparation process. (a) Chemical structures of nematic liquid crystal, chiral dopant (CB15), OTS, and PMMAZO; (b) cell preparation process

Fig. 2. Morphologies of CLCs confined in cells with different cell thicknesses and grafting densities of PMMAZO for scale bar of 25 μm

Fig. 3. Average size of fingerprint domain in cells with 7 μm and 9 μm thicknesses. (a) OTS; (b) mass fraction of PMMAZO is 0.03%, σ=1.800×10^-2 chain/nm²; (c) mass fraction of PMMAZO is 0.06%, σ=2.060×10^-2 chain/nm²; (d) mass fraction of PMMAZO is 0.08%, σ=2.362×10^-2 chain/nm²; (e) mass fraction of PMMAZO is 0.12%, σ=2.680×10^-2 chain/nm²; (f) average size of fingerprint domain for OTS and different PMMAZO mass fractions when σ=1.800×10^-2 chain/nm²

Fig. 4. Morphologies of CLCs in cells with different thicknesses when mass fraction of PMMAZO is 0.03% and scale bar is 10 μm. (a) 0.1 μm; (b) 1 μm; (c) 2 μm; (d) 3 μm; (e) 5 μm; (f) 7 μm; (g) 9 μm; (h) 10 μm; (i) 12 μm; (j) 14 μm

Fig. 5. Period of helix versus thickness of cell under different PMMAZO concentrations. (a) OTS; (b) mass fraction of PMMAZO is 0.03%; (c) mass fraction of PMMAZO is 0.06%; (d) mass fraction of PMMAZO is 0.08%; (e) mass fraction of PMMAZO is 0.12%