Unoriented micro-Raman spectra were obtained at Turin University with a HoribaJobin Yvon LabRam HRVIS apparatus, equipped with a motorized x-y stage and an Olympus microscope. The backscattered Raman signal was collected with a 50× objective, and the Raman spectrum was obtained for a non-oriented position. The 632.8 nm line of a He-Ne laser was used as the excitation wavelength; laser power was controlled by a series of density filters. The minimum lateral and depth resolution was set to a few µm. The system was calibrated using the 520.6 cm–1 Raman band of silicon before each experimental session. The spectra were collected in 8 to 10 acquisitions with single counting times ranging between 40 and 120 seconds. Spectral manipulation such as baseline adjustment, smoothing, and normalization were performed using the LabSpec 5 software package (HoribaJobin Yvon, 2004 and 2005). For band component analysis, we used the Fityk software package (Wojdyr, 2010), which enabled us to select the type of fitting function and fix or vary specific parameters accordingly. The spectra were recorded for the 100–1300 cm–1 range using the LabSpec 5 program.
Unoriented micro-Raman spectra were obtained at Turin University with a HoribaJobin Yvon LabRam HRVIS apparatus, equipped with a motorized x-y stage and an Olympus microscope. The backscattered Raman signal was collected with a 50× objective, and the Raman spectrum was obtained for a non-oriented position. The 632.8 nm line of a He-Ne laser was used as the excitation wavelength; laser power was controlled by a series of density filters. The minimum lateral and depth resolution was set to a few µm. The system was calibrated using the 520.6 cm–1 Raman band of silicon before each experimental session. The spectra were collected in 8 to 10 acquisitions with single counting times ranging between 40 and 120 seconds. Spectral manipulation such as baseline adjustment, smoothing, and normalization were performed using the LabSpec 5 software package (HoribaJobin Yvon, 2004 and 2005). For band component analysis, we used the Fityk software package (Wojdyr, 2010), which enabled us to select the type of fitting function and fix or vary specific parameters accordingly. The spectra were recorded for the 100–1300 cm–1 range using the LabSpec 5 program.
การแปล กรุณารอสักครู่..