Short-range order in ultrathin film titanium dioxide studied by Raman spectroscopy

Abstract

It is demonstrated here that nonresonant Raman spectroscopy can be used for unequivocal determination of short-range order in ultrathin films, using different structures of titanium dioxide as the model system. Titania films as thin as 7 nm sputter deposited on 〈111〉 Si have been analyzed and their phase content determined.

Improved optical response for N-doped anatase TiO2 films prepared by pulsed laser deposition in N2/NH3/O2 mixture

“…5. These spectra have the similar characteristics with the five Raman peaks around 155, 202, 399, 511, and 624 cm À1 , corresponding to the Raman active fundamental modes for anatase phase [49,50]. No other phases like rutile or TiN were detected.…”

MicroRaman study of the effect of oxide layer on nitriding of Ti–6Al–4V

“…That the a grains under go faster dissolution can be seen from the Raman spectra from the a grains where fewer Raman features are found in Fig. 3A in the range expected for titanium oxides [23][24][25][26][27][28]. The broadness of the Raman peaks in Fig.…”

Surface modification of Ti by an Ar‐O mixture dc plasma

“…As the temperature increases above 500 Figure 5 depicts the Raman spectrum between 300 and 800 cm -1 . Taken at a 500 o C and 550 °C, the peaks at 447.9 and 612 cm -1 [13] correspond to the rutile phase of TiO 2 . It should be observed that at higher temperatures new peaks can be originated.…”