1. The vibrational properties of the alloy have been investigated by Raman spectroscopy . 2. Tip-enhanced Raman spectroscopy requires a confocal microscope, and a scanning probe microscope. 3. Raman spectroscopy has been successfully tested to detect explosives and their precursors.4. Both resonance Raman and resonance hyper Raman spectroscopy employ a tunable laser. 5. Illuminating disease and enlightening biomedicine : Raman spectroscopy as a diagnostic tool. 6. These two mode have also been combined with the near-field Raman spectroscopy . 7. Non-linear Raman spectroscopy tends to be more sensitive than conventional Raman spectroscopy . 8. Non-linear Raman spectroscopy tends to be more sensitive than conventional Raman spectroscopy. 9. E . g ., Raman tweezers, which combine Raman spectroscopy with optical tweezers. 10. Raman spectroscopy and other infrared techniques have been used to detect cancer lesions.