Resumo

RAMIREZ-FERNANDEZ, O. et al. Plasma gradient modified scaffolds to generate a chemoattractant surface. Superf. vacío [online]. 2014, vol.27, n.1, pp.20-23. ISSN 1665-3521.

A gradient of plasma polymerization of pyrrole was generated to model a chemoattractant surface; it was obtained by changing the polymerization time to manipulate the thickness and the deposited layer. The polymerization was generated with a power of 30W on a cylindrical vacuum reactor, the coverslip was polymerized covered by a cavity with a surface exposed of 0.7 cm every 35 min., the cells seeded were liver stellate cells (Ito); it was evaluated against a coverslip with continuous plasma polymerization of pyrrole (Ppy). The results show similar protein secretions, but cells proliferation was selective in the surface gradient regions.

Palavras-chave : Chemotaxis; Chemoattractant; Plasma Polypyrrole; Ito cells; Cell Culture; Modified Surfaces; Biomaterials.

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