Template-Free Preparation of Thermoresponsive Magnetic Cilia Compatible with Biological Conditions

Autor(es)

Grein-Iankovski, Aline ^{[1, 2]} ; Graillot, Alain ^[3] ; Radiom, Milad ^[1] ; Loh, Watson ^[2] ; Berret, Jean-Francois ^[1]

Afiliação do(s) autor(es)

^[1] Univ Paris, CNRS, Matiere & Syst Complexes, F-75013 Paris - France

^[2] Univ Campinas UNICAMP, Inst Chem, BR-13083970 Campinas - Brazil

^[3] Specif Polymers, ZAC Via Domitia, F-34160 Castries - France

• Tipo de documento: Artigo Científico
• Fonte: Journal of Physical Chemistry C; v. 124, n. 47, p. 26068-26075, NOV 25 2020.
• Citações Web of Science: 0

Resumo

Bio-inspired materials are commonly used in the development of functional devices. The fabrication of artificial cilia mimicking the biological functions has emerged as a promising strategy for fluid manipulation in miniaturized systems. In this study, we propose a different physicochemical insight for the preparation of magnetic cilia based on the temperature-triggered reversible assembly of coated iron oxide nanoparticles in a bio-compatible template-free approach. The length of the prepared cilia could be tuned between 10 and 100 mu m reaching aspect ratios up to 100 in a very dense array of flexible structures with persistence lengths around 8 mu m. Magnetic actuation of the cilia revealed robust structures (over several hours of actuation) with a wide range of bending amplitudes resulting from high susceptibility of the filaments. The results demonstrate that the proposed strategy is an efficient and versatile alternative for templated fabrication methods and producing cilia with remarkable characteristics and dimensions within the template-free approaches. (AU)

• Processo FAPESP: 17/04571-3 - Nanopartículas Janus magnéticas
• Beneficiário: Aline Grein Iankovski
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/16330-3 - Nanopartículas termo e magneto-responsivas para a fabricação de novos biomarcadores
• Beneficiário: Aline Grein Iankovski
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado