Abstract
Densest possible packings of identical spheroids in cylindrical confinement have been obtained through MonteCarlo simulations. By varying the shape anisotropy of spheroids and also the cylinder-to-spheroid size ratio, a variety of densest possible crystalline structures have been discovered, including achiral structures with specific orientations of particles and chiral helical structures with rotating orientations of particles. Our findings reveal a transition between confinement-induced chiral ordering and shape-anisotropy-induced orientational ordering and would serve as a guide for the fabrication of crystalline wires using anisotropic particles.
Highlights
Densest possible packings of identical spheroids in cylindrical confinement have been obtained through Monte Carlo simulations
Physicists and mathematicians have long been fascinated by problems of particle packing
Packings in confinement have become a subject of immense interest, as they are relevant to many different entities and applications such as cell morphology within epithelial tissues [5], phyllotaxis in plants like sunflower seeds and pine cones [6], droplet-based fabrication of microparticles [7], and drug delivery [8], as well as a number of self-assembled systems in cylindrical confinement [9,10,11,12,13,14,15,16,17,18,19,20]
Summary
Densest possible packings of identical spheroids in cylindrical confinement have been obtained through Monte Carlo simulations. Densest possible packings in such quasi-1D confinement can generally be referred to as columnar crystals, as they are periodic along the axial direction of the cylinder with every unit cell being a rotation (of twist angle α) of the previous one.
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