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- W2034503579 abstract "Nanoscale surface modification of biomedical implant materials offers enhanced biological activity concerning protein adsorption and cell adherence. Nanoporous anodic alumina oxide (AAO) layers were prepared by electrochemical oxidation of thin Al-seed layers in 0.22 M C2H2O4, applying anodization voltages of 20–60 V. The AAO layers are characterized by a mean pore diameter varying from 15 to 40 nm, a mean pore distance of 40–130 nm, a total porosity of ∼10% and a thickness of 560 ± 40 nm. Zeta potential and isoelectric point (iep) were derived from streaming potential measurements and correlated to the topology variation of the nanoporous AAO layers. With decreasing pore diameter a shift of iep from ∼7.9 (pore diameter 40 nm) to ∼6.7 (pore diameter 15 nm) was observed. Plain alumina layers, however, possess an iep of ∼9. Compared to the plain alumina surface an enhanced adherence and activity of hFOB cells was observed on the nanoporous AAO after 24 h culture with a maximum at a pore size of 40 nm. The topology-induced change of the electrochemical surface state may have a strong impact on protein adsorption as well as on cell adhesion, which offers a high potential for the development of bioactive AAO coatings on various biomaterial substrates." @default.
- W2034503579 created "2016-06-24" @default.
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- W2034503579 date "2014-02-01" @default.
- W2034503579 modified "2023-10-01" @default.
- W2034503579 title "Morphological zeta-potential variation of nanoporous anodic alumina layers and cell adherence" @default.
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- W2034503579 doi "https://doi.org/10.1016/j.actbio.2013.09.023" @default.
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