Artigo Revisado por pares

In vitro behaviour of nanocrystalline silver-sputtered thin films

2007; IOP Publishing; Volume: 18; Issue: 10 Linguagem: Inglês

10.1088/0957-4484/18/10/105103

ISSN

1361-6528

Autores

Ana P. Piedade, M.T. Vieira, Ana Rita Silva Martins, Fernando Silva,

Tópico(s)

Gold and Silver Nanoparticles Synthesis and Applications

Resumo

Silver thin films were deposited with different preferential orientations and special attention was paid to the bioreactivity of the surfaces. The study was essentially focused on the evaluation of the films by x-ray diffraction (XRD), atomic force microscopy (AFM), high-resolution transmission electron microscopy (HRTEM), electron probe microanalysis (EPMA) and contact angle measurements. The deposited thin films were characterized before and after immersion in S-enriched simulated human plasma in order to estimate the influence of the preferential crystallographic orientation on the in vitro behaviour. Silver thin films with and without (111) preferential crystallographic orientation were deposited by r.f. magnetron sputtering to yield nanocrystalline coatings, high compact structures, very hydrophobic surfaces and low roughness. These properties reduce the chemisorption of reactive species onto the film surface. The in vitro tests indicate that silver thin films can be used as coatings for biomaterials applications.

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