Laser hydrothermal reductive ablation of titanium monoxide: Hydrated TiO particles with modified Ti/O surface

Journal Article · Tue Jan 15 04:00:00 EST 2013 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.09.023· OSTI ID:22131196

Blazevska-Gilev, Jadranka ^[1]; Jandova, Vera ^[1]; Kupcik, Jaroslav ^[1]; Bastl, Zdenek ^[2]; Subrt, Jan; Bezdicka, Petr ^[3]; Pola, Josef ^[1]

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1. Laboratory of Laser Chemistry, Institute of Chemical Process Fundamentals, ASCR, Prague 16502 (Czech Republic)
2. J. Heyrovsky Institute of Physical Chemistry, ASCR, Prague 18223 (Czech Republic)
3. Institute of Inorganic Chemistry, ASCR, Rez 25068 (Czech Republic)

IR laser- and UV laser-induced ablation of titanium monoxide (TM) in hydrogen (50 Torr) is compared to the same process induced in vacuum and shown to result in deposition of hydrated surface modified nanostructured titanium suboxide films. Complementary analyses of the films deposited in vacuum and in hydrogen by Fourier transform infrared, Raman and X-ray photoelectron spectroscopy, X-ray diffraction and electron microscopy allowed to determine different features of both films and propose a mechanism of surface modification of ejected particles, which involves hydrothermal reduction of TM and subsequent reactions of evolved water. The films exert good adhesion to metal and quartz surfaces and are hydrophobic in spite of having their surface coated with adsorbed water. - Graphical abstract: Laser ablation of titanium monoxide (TiO) in hydrogen involves a sequence of H{sub 2} and H{sub 2}O eliminations and additions and yields hydrated amorphous nanostructured titanium suboxide which is richer in oxygen than TiO. Highlights: Black-Right-Pointing-Pointer IR and UV laser ablated particles of titanium monoxide (TiO) undergo amorphization. Black-Right-Pointing-Pointer Films deposited in vacuum have TiO stoichiometry and are oxidized in atmosphere. Black-Right-Pointing-Pointer Films deposited in hydrogen are hydrated and have more O in topmost layers. Black-Right-Pointing-Pointer Films modification in hydrogen is explained by reactions in hydrogen plasma.

• OSTI ID: 22131196
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 197; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABLATION
DEPOSITION
ELECTRON MICROSCOPY
FILMS
FOURIER TRANSFORMATION
HYDRATION
HYDROGEN
LASERS
LAYERS
NANOSTRUCTURES
PARTICLES
SURFACES
TITANIUM
TITANIUM OXIDES
WATER
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY