The formation of hierarchical structures consisting of microstripe barriers decorated with nanorough ablated materials prepared by direct laser writing is described. Linear features of circa 25 μm width and 12 μm height are achieved on amorphous and …
The main purpose of his project is the development of biosensors based on substrates of nanostructured silicon compounds. Among these materials we have chosen porous silicon (PS) with controlled nanocrystal size and nanostructured silica in the form MCM41.
Investigation of ion beam techniques for the development of micro- and nanostructures showing (a) Optical contrast that could be exploited as photonic structures of interest in optoelectronics, and (b) Electrical properties contrast that could be used as electric protocols to stimulate specific processes of biological cell differentiation
The effects of high-energy silicon (5 MeV, 7.5 MeV and 30 MeV) irradiations have been optically investigated by the dark-mode m-lines technique. In all cases, an optically isotropic homogeneous layer is created after a certain critical fluence that …
The influence of the anodization time on some structural characteristics (dissolved mass, maximum porous layer thickness, porosity, crystallite size, etc.) of p-type porous silicon has been investigated. It is shown that chemical dissolution of the …
We have studied the stress in porous silicon films with different porosities at the interface with the substrate. Micro-Raman spectra were measured along a cleaved cross section to sample different layer depths. Each spectrum was fit to the phonon …