Raman study of phase transformation of TiO2 rutile single crystal ...
2007年7月15日 · Titanium dioxide (TiO 2) rutile single crystal was irradiated by infrared femtosecond (fs) laser pulses with repetition rate of 250 kHz and phase transformation of rutile TiO 2 was observed. Micro-Raman spectra show that the intensity of E g Raman vibrating mode of rutile phase increases and that of A 1g Raman vibrating mode decreases ...
Asymmetric Lattice Vibrational Characteristics of Rutile TiO2 as ...
Here we present laser power dependence Raman spectroscopic studies of rutile TiO 2 to reveal the response of various Raman-active lattice vibrations. Apparently, different vibrational modes display distinctive and reversible trends with the change of laser power.
Lattice dynamics and Raman spectrum of rutile TiO2: The role …
2012年11月15日 · Using the plane-wave pseudopotential technique based on the first-principles density functional perturbation theory (DFPT), we have studied the vibrational properties and Raman susceptibility tensor at ambient and high pressure of rutile phase of TiO 2.
Raman spectra of (a) anatase, and (b) rutile TiO 2 - ResearchGate
To characterize the presence of TiO 2 in the composite, we analyzed the Raman spectra of the pure TiO 2 and the TiO 2 -PPy nanocomposites ( Figure 2b). Anatase TiO 2 exhibits...
UV Raman Spectroscopic Study on TiO2. I. Phase Transformation …
2005年12月10日 · Phase transformation of TiO 2 from anatase to rutile is studied by UV Raman spectroscopy excited by 325 and 244 nm lasers, visible Raman spectroscopy excited by 532 nm laser, X-ray diffraction (XRD), and transmission electron microscopy (TEM).
Raman scattering of TixV1‐xO2 thin films on (110) rutile TiO2 in …
2024年5月23日 · The impact of Ti doping of VO2 thin films on (110) rutile TiO2 substrates was studied by Raman spectroscopy. The scattering geometry of the Raman experiment defines the relationships between the expe...
Raman spectra of titanium dioxide (anatase, rutile) with identified ...
Six representative isotope-labeled samples of titanium dioxide were synthesized: Ti16O2, Ti17O2 and Ti18O2, each in anatase and rutile forms. Their Raman scattering was analyzed at temperatures down to 5 K. Spectral assignment was supported by numerical simulation using DFT calculations.
Size-dependent modifications of the Raman spectrum of rutile TiO2 ...
2006年10月18日 · Crystallite-size-dependent variations in the Raman spectrum of rutile Ti O 2 have been characterized and compared with those of the well-investigated rutile Sn O 2 . For an average crystallite size below ∼ 25 nm , the Raman spectrum of rutile Ti O 2 nanocrystals displays an additional low-frequency, possibly surface vibrational, mode ...
2012年3月27日 · Raman mode. A dominant role of phonon-phonon kinematics on phonon shifts and broad-enings is reported. Force field molecular dynamics (MD) calculations with the Fourier-transformed velocity autocorrelation method were also used to perform a quantitative stud.
Quantification of titanium dioxide (TiO2) anatase and rutile …
2023年9月19日 · This article presents an interlaboratory comparison (ILC) on Raman spectroscopy as a technique for relative quantification of the two most common polymorphs of titanium dioxide (TiO 2)—anatase and rutile—in binary mixtures.