Optical and morphological evolution of black TiOx synthesized in water by Nd:YAG laser. Issue 9 (27th July 2017)

• Record Type: Journal Article
• Authors: Spucches, D.; Zimbone, M.; Cacciato, G.; Ruffino, F.; Privitera, V.; Grimaldi, M. G.
• Is Part Of: Physica status solidi. Volume 14:Issue 9(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-27
• Subjects: accumulated fluence -- laser treatment -- nanoporous surface -- nanostructure -- titanium oxides; Solid state physics -- Congresses; Solid state physics -- Periodicals; Solid state physics; Conference proceedings; Periodicals; 530.41
• DOI: 10.1002/pssc.201700134
• Languages: English
• ISSNs: 1862-6351

Abstract

Abstract : Optical and morphological properties of nanostructured TiO x film formed by 532 nm nanosecond pulsed laser irradiation in water is analysed. We observe three different surface features: blackening, surface pits and sub‐surface bubbles. The appearance of these features is allowed once an irradiation fluence of 0.9 J cm −2 is used. Nevertheless, blackening, formation of pits and bubble are delayed until an accumulated fluence threshold of 7.5, 23 and 24 J cm −2 is achieved respectively. A fully evolved complex nano‐porous structure is obtained at an accumulated fluence of 100 J cm −2 . A possible mechanism of formation of these features was inferred.