20.500.12556/RUL-99797 Fractal nematic colloids Fractals are remarkable examples of self-similarity where a structure or dynamic pattern is repeated over multiple spatial or time scales. However, little is known about how fractal stimuli such as fractal surfaces interact with their local environment if it exhibits order. Here we show geometry-induced formation of fractal defect states in Koch nematic colloids, exhibiting fractal self-similarity better than 90% over three orders of magnitude in the length scales, from micrometers to nanometres. We produce polymer Koch-shaped hollow colloidal prisms of three successive fractal iterations by direct laser writing, and characterize their coupling with the nematic by polarization microscopy and numerical modelling. Explicit generation of topological defect pairs is found, with the number of defects following exponential-law dependence and reaching few 100 already at fractal iteration four. This work demonstrates a route for generation of fractal topological defect states in responsive soft matter. soft matter physics colloidal particles nematics fractals topology true false false Nature Publishing Group Angleški jezik Ni določen Neznano 2018-02-16 14:11:32 2018-02-16 14:11:32 2022-08-24 17:06:52 0000-00-00 00:00:00 2017 0 0 Str. 12106-1-14026-9 Vol. 8 2017 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 53 2041-1723 10.1038/ncomms14026 30202663 2315876 RAZ_Hashemi_S._M._i2017.pdf RAZ_Hashemi_S._M._i2017.pdf 1 95641B7810B5CDAE34875B72E54C50D7 f15c4c1be337ed67223fa9632fd132e2343dd387b231715d5235dd79bf1de088 a3844070-a1b4-11eb-a523-00155dcfd717 20.500.12556/rul/29e61045-6fe0-46e3-9b7b-9f03a7a23f52 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=109402 https://www.nature.com/articles/ncomms14026 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=141235 Fakulteta za matematiko in fiziko 0 0 0