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Orientador(es)
Resumo(s)
Microfibers with their elongated shape and translation symmetry can act as important components in various soft materials, notably for their mechanics on the microscopic level. Here we demonstrate the mechanical response of a micro-object to imposed chirality, in this case, the tilt of disclination rings in an achiral nematic medium caused by the chiral surface anchoring on an immersed microfiber. This coupling between chirality and mechanical response, used to demonstrate sensing of chirality of electrospun cellulose microfibers, is revealed in the optical micrographs due to anisotropy in the elastic response of the host medium. We provide an analytical explanation of the chirogyral effect supported with numerical simulations and perform an experiment to test the effect of the cell confinement and fiber size. We controllably twist the microfibers and demonstrate the response of the nematic medium. More generally the demonstrated study provides means for experimental discrimination of surface properties and allows mechanical control over the shape of disclination rings.
Descrição
Palavras-chave
Contexto Educativo
Citação
COPAR. S. [et al] - Sensing and tuning microfiber chirality with nematic chirogyral effect. Physical Review E. ISSN 2470-0045. Vol. 93, N. º 3 (2016), pp. 032703-1-032703-7
Editora
American Physical Society