Abstract
The implementation of the Ion Plating Plasma Assisted technology in the area of surface functionalization for structural color and relic preservation applications is presented. Interferometric structural colors on irregular bumped Titanium surfaces and transparent and achromatic nano films on ancient ceramic artifact have been investigated. Titanium metal and ceramic supports have been utilized for the surface functionalization tests: A metallic electron beam additive manufactured Titanium component and an ancient tile of the XIX century, which was characterized by strong chromatic valence and by a mixed porous and glazed surfaces, have been considered. A reactive magnetron sputtering Ion Plating Plasma Assisted apparatus operating in Argon or Oxygen atmospheres for TiO2 and SiO2 deposition has been utilized. Preliminary tests with two plasma treatments were carried out for optimal processing conditions definition. TiO2 nano-film deposition on irregular Ti surfaces has generated light direction depending color-changing surfaces while good achromatic and transparent coatings were obtained by using SiO2 coating. The high processing flexibility of the Ion plating technology is discussed. The SiO2 IPPA surfaces treatment resulted more convenient for restorative and preservation ancient historical tile was used to finally test the optimized process with Ion Beam Electron Microscopy, which was carried out on the tile porous structure, confirmed the high flexibility and efficiency of the innovative IPPA technology.
Highlights
Not all colors in nature come from the material inherent chemical structure coloring
Rayleigh (1917; 1919) used the electromagnetic theory to derive the concept to express the reflection properties from a regularly stratified medium. This theory was the base to explain the nature of the colors of crystals, feather and beetles and butterflies (Kwok et al, 1997), which varied with the incidence of light direction, were not inherent colors but structural colors (Aronov and Rosenman, 2007)
We present exploratory investigations that combine simple and complex surface morphologies to explain some fundamental optical properties underlying the structural colors
Summary
Not all colors in nature come from the material inherent chemical structure coloring. A complete understanding of these structures was first achieved with the use of the electron microscopy and more recently, by the ion double beam microscopy and Atomic force microscopy that enabled us the vision of the micro and nano structure morphology of natural born structural color generating systems These studies (Kinoshita and Yoshioka, 2005) have clarified that coloring are due to the presence of specific micro and nanostructures, which cannot be realized by the know present nanotechnologies that, need to be further technologically developed. The deposition of highly strength oxide layers such as SiO2 and TiO2 used in this study, has turned out to be rather satisfactory innovation of great practical significance in several field of application The use of such techniques in the area of aesthetic and historical heritage conservation is presented in this study. Additive manufactured Titanium samples of complex structure and ceramic tiles have been utilized for the tests: two contemporaneous production tiles, all characterized by strong chromatic valence and by mixed porous tile and glazed surfaces and a component electro beam manufactured in a plant for metal prostheses production have been used in our study
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