Patterns on Non-Planar Surface Driven by Stress(<Special Issue>Prospective Crystal Growth)

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  • Patterns on non-planar surface driven by stress

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The triangular tessellation and the Fibonacci spiral patterns of definite chirality can be reproduced through stress manipulation on the Ag core/ SiO_2 shell microstructures. These results will be very helpful for the design and fabrication of patterned structures on curved surfaces that can find useful applications in photonics and foldable electronics. Furthermore, these results obtained in a purely inorganic material system hint at the role of stress in influencing the plant patterns. We speculate that the prerequisite for the occurrence of Fibonacci spiral patterns as stressed buckling modes be the availability of a conical support. The robust adherence of the stressed patterns to the geometry of the supports sheds some light on the mechanical rationale underlying the formation of particular plant patterns. Of course, a comprehensive model for the formation of plant patterns should incorporate as well the biochemical and genetic processes that alter growth at deeper levels.

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