Nanoporous silicon-based surface patterns fabricated by UV laser interference techniques for biological applications

The fabrication of selectively functionalized micropatterns based on nanostructured porous silicon (nanoPS) by phase mask ultraviolet laser interference is presented here. This single-step process constitutes a flexible method for the fabrication of surface patterns with tailored properties. These s...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2016-05, Vol.49 (22), p.225401-225408
Main Authors: Recio-Sánchez, G, Peláez, R J, Vega, F, Martín-Palma, R J
Format: Article
Language:English
Subjects:
Biocompatibility
Biological
Biomaterials
Biomedical materials
Cristalls fotònics
Enginyeria biomèdica
Enginyeria electrònica
Interference
Interferometria làser
laser interference
Laser interferometers
Lasers
Làser
Materials biomèdics
Materials nanoestructurats
Materials porosos
micropattern
Nanoparticles
Nanostructure
Nanostructured materials
nanostructured porous silicon
Optoelectrònica
Photonic crystals
Porosity
Porous materials
Porous silicon
Silicon
Àrees temàtiques de la UPC
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Summary:The fabrication of selectively functionalized micropatterns based on nanostructured porous silicon (nanoPS) by phase mask ultraviolet laser interference is presented here. This single-step process constitutes a flexible method for the fabrication of surface patterns with tailored properties. These surface patterns consist of alternate regions of almost untransformed nanoPS and areas where nanoPS is transformed into Si nanoparticles (Si NPs) as a result of the laser irradiation process. The size of the transformed areas as well as the diameter of the Si NPs can be straightforwardly tailored by controlling the main fabrications parameters including the porosity of the nanoPS layers, the laser interference period areas, and laser fluence. The surface patterns have been found to be appropriate candidates for the development of selectively-functionalized surfaces for biological applications mainly due to the biocompatibility of the untransformed nanoPS regions.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/49/22/225401