INQUISUR   21779
INSTITUTO DE QUIMICA DEL SUR
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Silicon Nanowires: fabrication and bio-film formation
Autor/es:
JUAN M. RUSO, NATALIA HASSAN, VALERIA VERDINELLI, PAULA V. MESSINA.
Lugar:
Malmö
Reunión:
Congreso; ECIS 2012. 26th Conference of the European Colloid and Interface Society; 2012
Resumen:
Silica-based nanomaterials are of great interest because of their potential applications in technical and biological devices. Here we first report the use of a microemulsion droplet system as a simple and controllable route for the synthesis of opals-CT materials with and unusual microstructure and interesting optoelectronic characteristics. Very long fibrils of 30-50 nm diameter and more than 20 m length showing simultaneous short and long wavelength light emissions. Then, thinking in the future use of Si-nanofibers in three-dimensional, 3D, scaffolds for the construction of implantable artificial devices, the correlation among the material surface characteristics and the amount, structure and distribution of adsorbed fibrinogen (Fb) molecules was analyzed. The Fb adsorption process on the Si-nanofibers occurs in a stepwise fashion with an initial rapid adsorption, an intermediate reorganization and finally a second slower adsorption regime over a longer time period. There was a partial protein desorption after the first adsorption process, which demonstrate that this step is reversible until the first 2  104 seconds. Nevertheless the whole process is irreversible with a high distortion of the original material morphology. The fibrous structure and the similitude in size between the fibrillar substrate and the Fb molecules are proposed to be the key for the adsorption enhance process and the final acquired material topography.