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Optical and morphological properties of nanostructured TiOx 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.
WILEY‐VCH Verlag Berlin GmbH
Publication date: 
1 Sep 2017

D Spucches, M Zimbone, G Cacciato, F Ruffino, V Privitera, MG Grimaldi

Biblio References: 
Volume: 14 Issue: 9 Pages: 1700134
physica status solidi c