I have obtained the raman shift peaks at 225 cm-1, 1580 cm-1 and 2935 cm-1. What does these raman shift peaks signify? Does bulk silver produce raman peaks? Why does the silver nanowires have high intensity raman peaks compared to the other materials which were analyzed using the same light source?
Light source: 532 nm laser
Hello, the Raman peaks give information about the chemical composition and crystal structure, so it's first an identificator of the materials, because each material have well defined peaks at given positions. The slight change in peak positions, relative intensity, and width of the peaks can give information about the crystallite size, defect, conductivity, and specific dopants of the material.
A quick search shows that bulk silver does not produce Raman peaks as its vibrations are not Raman active, but silver nanowires can produce peaks because of phonon confinement, so silver nanowires may produce strong Raman peaks.
It should be noted that the interpretation is quite complex since the raman peaks depend on so many variables. I struggled with the interpretation many times.
Lokesh Murali you are welcome, you can mark my answer as best if it answers yourr question.
Aurelio Sanz Arranz I have herewith attached the image file of raman sectra obtained for silver nanowires
Well, a combination of peaks near 1350/cm and 1550/cm such as your image shows is a classical fingerprint of (disordered) carbon (including the second harmonic at 2930/cm).
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