I want to inquire whether nanomaterials merely act as the substrates for some molecules which are to be analyzed, or they themselves show lines in Raman spectroscopy.
For reference, an image of Raman spectra of nanoparticles has been attached below.
You forgot to attach the spectrum.
Enhancing is a special effect which strongly depends on the Laser and the material.
Stokes and Antistokes scattering is also possible for nanomaterials. Why not it’s only larger than molecules and smaller than microscopic or macroscopic materials?!?
The difference / advantage (of Raman in comparison to IR) is not only the possible measuring setup but also that Raman is “more sensitive “ to less-polar components so that the signals of organic modifications are stronger. Mist likely the signal of the modification is not at the same wave number as the ones of inorganice particles.
From my opinion a microscope should be used.
As Michael says, we are attachment lacking.... OK, attachments after we posted....
The Raman signal is very very weak scattering and even more so for smaller particles which is why it will be difficult to see. Nanoparticles ( < 100 nm) also need imaging under and electron microscope rather than manual. That's why typically particles > 1 or 2 microns are imaged for Raman. If you increase laser power to try to get more signal then it's possible to cook or even vaporize the sample.
PS I would have thought from India you would have used the term 'Raman' rather than 'raman' out of respect to the great scientist Sir Chandrasekhara Venkata Raman.......
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