8 research outputs found
Surface Functionalisation and Characterization of Diamond Thin Films for Sensing Applications
In this thesis work nanoscrystalline optical properties of diamond and two recent new NCD functionalisation techniques involving UV light (one step method and photochemical oxidation) have been investigated.
Firstly the oxidation of diamond surface caused by the irradiation of the surface with UV-light in oxygen atmosphere was considered.
Two different experiments in situ were realized in order to understand the physic-chemistry of this method. The chemical bonds between oxygen and surface carbon atoms were investigated by firstly performing an annealing treatment in ultra hight vacuum of a oxidized UV surface and then comparing the obtained result with annealing treatments of two different oxygenated diamond surfaces using other two
techniques: plasma oxidation and piranha solution oxidation.
An other interesting aspect on which clarity has to be made deal with amination process of diamond surface. As a first fundamental step, the efficiency on hydrogenated diamond surface was investigate. Successively the role of oxygen
in the chemistry of amination process was studied performing in situ experiments using different terminated diamond surface (hydrogenated, chemically oxidized, UV
oxidized) and different gaese (pure NH3 or NH3 + O2)
Characterization of Gold nanoclusters synthesized on carbon nanotubes film: evaluation of the size distributions by means of X-ray photoelectron spectroscopy
In situ XPS study of photochemical amination of nanocrystalline diamond in pure ammonia gas
X-ray photoelectron spectroscopy of SiO 2 -HfO 2 amorphous and glass-ceramic waveguides: a comparative study
Synthesis and characterization of PMMA-based superhydrophobic surfaces
Recently, superhydrophobic surfaces are gaining much interest because they may be employed in a series of applications, spanning from the realization of self-cleaning surfaces to microfluidics to special water-impermeable tissues allowing perspiration. It is well-known that superhydrophobicity strictly depends on the combination of superficial micro- and nano-structures. Then, key factors in the process of surface synthesis are the parameters which will define the surface conformation. In this work, we deal with the fabrication of polymer-based superhydrophobic surfaces. We developed a new method to have a good control of the structure of the synthesised surface. A high stability of the superhydrophobic character during time was obtained. Moreover, the synthesis process is green and easily transferable to industry for large production