Helix-like structure formation of a semi-flexible chain confined in a cylinder channel

Wen Xiaohui^{1, 2, †,}, Sun Tieyu², Zhang Wei-Bing³, Lam Chi-Hang², Zhang Linxi⁴, Zang Huaping⁵

(a) cos(ϕ_i) and cos(φ_i) as a function of chain bond i for action radius R = 3, monomer number N = 100, and chain stiffness parameter b = 200. (b) Comparisons with identical chain monomer number N = 50 and chain stiffness parameter b = 200, but with different cylinder radius R = 2, 3, and 4 from the top to the bottom. Each plot has two curves corresponding to cos(ϕ_i) and cos(φ_i), respectively.