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Impact of Surface Nano-textured Stainless Steel Prepared by Focused Ion Beam on Endothelial Cell Growth

Abstract : The modification of stent surfaces with nano-structures has the potential for limiting late stent restenosis. We report here the patterning of 316L austentitic stainless steel with arrays of nano-pits of two nominal diameters: 120 and 180 nm. These nano-textured surfaces were prepared by focused ion beam milling. The influence of the ion beam current on the nano-features was investigated by scanning electron and atomic force microscopies. The optimum ion beam currents were 280 pA for 120 nm nano-pits and 920 pA for 180 nm nano-pits. The depths of the nano-pits formed were (65 +/- 24) nm (120 nm) and (84 +/- 36) nm (180 nm). This wide distribution of the depths is due to the polycrystalline nature of 316 L stainless steel, which has a strong influence on the milling rates. Endothelial cells were grown in vitro on these substrates for 1, 3 and 5 days. The cells were viable for the duration of the cell culture on the nano-textured substrates. There was no significant difference in the adhesion and the proliferation based on the nano-pit diameter.
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https://hal.univ-lorraine.fr/hal-01501645
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Submitted on : Tuesday, April 4, 2017 - 2:40:57 PM
Last modification on : Friday, February 26, 2021 - 2:42:01 PM

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Feroze Nazneen, Michael Schmidt, Eve Mcloughlin, Nikolay Petkov, Gregoire Herzog, et al.. Impact of Surface Nano-textured Stainless Steel Prepared by Focused Ion Beam on Endothelial Cell Growth. Journal of Nanoscience and Nanotechnology, American Scientific Publishers, 2013, 13 (8), pp.5283 - 5290. ⟨10.1166/jnn.2013.7476⟩. ⟨hal-01501645⟩

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