The initial interactions of oxygen with polycrystalline titanium surfaces

Azoulay, Adi; Shamir, N.; Fromm, E.; Mintz, M.H.

doi:10.1016/s0039-6028(96)00927-2

Cited by 49 publications

(19 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, we fit the O(1s) signal with two peaks at 530.8 eV and 531.6 eV, respectively, with a fixed FWHM of 1.5 eV. This is in agreement with earlier work on the oxidation of Ti, where also two oxygen peaks separated by 1.4 and 1.1 eV have been found [36,37]. In the present case one may speculate that the one (larger) peak relates to oxygen bound to Ti 4+ ions, and the other one to oxygen bound to Ti 3+ species.…”

Section: Chemical Composition Of the Tio X Filmssupporting

confidence: 90%

“…Data for paramagnetic forms such as Ti 3+ generally have lower ASF values than the diamagnetic forms (e.g., Ti 4+ ) [33]. Therefore we relate the Ti 4+ (2p) intensity to the O(1s) peak at 530.8 eV, which is close to the commonly observed O(1s) binding energy for TiO 2 [36,37,6]. Using ASF values of 1.8 for the Ti(2p) signal (typical for Ti 4+ [33]) and 0.66 for the O(1s) peak [33], we obtain an O:Ti atomic ratio of 2.2.…”

Section: Chemical Composition Of the Tio X Filmsmentioning

confidence: 60%

See 1 more Smart Citation

Structure and growth of ultrathin titanium oxide films on Ru(0001)

et al. 2005

View full text Add to dashboard Cite

Section: Chemical Composition Of the Tio X Filmssupporting

confidence: 90%

Section: Chemical Composition Of the Tio X Filmsmentioning

confidence: 60%

Structure and growth of ultrathin titanium oxide films on Ru(0001)

et al. 2005

View full text Add to dashboard Cite

“…On the other hand, the DRS studies 5,7 have concluded that the oxygen adsorbs on the overlayer sites of a polycrystalline titanium surface. Also, an argument for the initial stage of oxygen adsorption on the alkali metal covered surface arises.…”

Section: Peak Amentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12] At the initial stage of oxygen adsorption, the following characteristic behaviors have been reported, and the position of the adsorbed oxygen atoms has been discussed. [1][2][3][4] Recently, however, some researchers have concluded, 5,7 based on the results of direct recoil spectroscopy ͑DRS͒ measurements, that the adsorbed oxygen atoms initially occupy sites over the topmost atomic layer of a polycrystalline titanium surface. [1][2][3][4][5] In addition, the electron-and photon-stimulated ion desorption ͑ESD 6 and PSD, 1 respectively͒ rates exhibit an onset at 1-2 L. These results have been explained by a model in which the adsorbed oxygen atoms initially occupy subsurface sites.…”

Section: Introductionmentioning

confidence: 99%

Metastable deexcitation spectroscopy study of oxygen adsorption on a polycrystalline titanium surface

Kurahashi¹,

Yamauchi²

1999

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

View full text Add to dashboard Cite

Articles you may be interested inAdsorption and diffusion of 3d transition metal atoms on the GaN(0001) surface Modulation of surface reactivity via electron confinement in metal quantum well films: O 2 adsorption on Pb ∕ Si ( 111 ) Adsorption of oxygen on a polycrystalline titanium surface at room temperature has been studied by metastable deexcitation spectroscopy in conjunction with ultraviolet photoelectron spectroscopy and Auger electron spectroscopy. From the analysis of the obtained spectra, we have shown the following. ͑1͒ With increasing oxygen exposure at Ͻ2 L, the surface density of states decreases substantially 1-2 eV below the Fermi level (E F ) but it undergoes a small change at around the E F . ͑2͒ The TiO 2 phase appears on the outermost titanium surface at around 5 L. It grows with increasing oxygen exposure, but it is a minor phase even at Ͼ100 L.

show abstract

“…Passivation of the Ti surface with oxides and nitrides or modification of it with ion implantation is therefore of practical importance. For realizing passivation of the Ti surface with oxides, the initial oxidation kinetics of polycrystalline Ti films has been investigated by X-ray photoelectron spectroscopy (XPS) [1][2][3], Auger electron spectroscopy (AES) [4][5][6] and ultraviolet photoelectron spectroscopy (UPS) [7]. These studies clarified that a mixture of different oxidation states of Ti (0, +1, +2, +3, +4) are present during the whole course of O 2 exposure, while TiO 2 grows preferentially, and oxygen accumulates beneath the surface at room temperature.…”

mentioning

confidence: 99%

Time-resolved photoelectron spectroscopy:

Erdmann¹,

Rubner²,

Shen³

et al. 2002

Journal of Organometallic Chemistry

View full text Add to dashboard Cite

High-resolution photoelectron spectroscopy using synchrotron radiation was applied for monitoring in real time the oxidation kinetics on the Ti(0001) surface at 405 o C with dry O 2 gas. The time evolution of O 1s photoelectron intensity showed a linear uptake curve up tõ 90 L followed by a sudden saturation up to ~160 L and then a restart of the linear increase, indicating that O 2 adsorption obeys a zero-order reaction scheme before and after the saturation. Corresponding to the first linear uptake and saturation, the surface core level shift (SCLS) component of Ti 2p decreased predominantly and disappeared completely, and appeared again after the saturation and remained persistently during TiO 2 growth. Thus the zero-order reaction of O 2 adsorption on the Ti (0001) IntroductionTitanium (Ti) is utilized in extensive applications such as space shuttle, aircraft, automobile, medicine and computer, because of its superior properties of light weight, strong, anticorrosive and heat-resistance. However, Ti surfaces are so reactive as to form easily compounds with any molecule except for rare gases. Passivation of the Ti surface with oxides and nitrides or modification of it with ion implantation is therefore of practical importance. For realizing passivation of the Ti surface with oxides, the initial oxidation kinetics of polycrystalline Ti films has been investigated by X-ray photoelectron spectroscopy (XPS) [1][2][3], Auger electron spectroscopy (AES) [4][5][6] and ultraviolet photoelectron spectroscopy (UPS) [7]. These studies clarified that a mixture of different oxidation states of Ti (0, +1, +2, +3, +4) are present during the whole course of O 2 exposure, while TiO 2 grows preferentially, and oxygen accumulates beneath the surface at room temperature.For the single crystal Ti(0001) surface, detailed studies on the initial oxidation kinetics were performed with respect to the lattice site of adsorbed oxygen by X-ray photoelectron diffraction (XPD) [8], the oxygen adsorption state by photon-stimulated desorption (PSD) [9], the oxygen uptake curve by AES [10] and the electronic structure by electron energy loss spectroscopy (EELS) and UPS [11]. The uptake curve of O KVV Auger electron intensity showed three significant breaks at which the increase rate slows down, indicating that the reaction kinetics for O 2 adsorption and oxide growth changes depending on O 2 dose. It was observed by XPS [8] and AES [10] that such changes are associated with progress of the oxidation state from TiO to Ti 2 O 3 and TiO 2 . However, identification of the oxidation state was not clear for lack of the energy resolution in XPS and AES. Although most of the previous studies have been performed at room temperature, further interesting results were reported for oxidation at high temperature. In the case of polycrystalline Ti, it was observed that upon increasing the O 2 dose the work function shows a larger decrease at higher temperature above 100 o C followed by an increase and a subsequent plateau [12], suggesting that ads...

show abstract

The initial interactions of oxygen with polycrystalline titanium surfaces

Cited by 49 publications

References 41 publications

Structure and growth of ultrathin titanium oxide films on Ru(0001)

Structure and growth of ultrathin titanium oxide films on Ru(0001)

Metastable deexcitation spectroscopy study of oxygen adsorption on a polycrystalline titanium surface

Time-resolved photoelectron spectroscopy:

Contact Info

Product

Resources

About