Is it possible to use the variation or the movement of IR or Raman spectral lines to determine nanomaterial particle size? Has anyone performed this task experimentally?
I think, Mudar, you sum it up quite well: It is theoretically possible, but since the spectra are influenced by a range of factors (including several size-dependent properties), I believe it would be difficult to get reliable data, depending on the material you wish to sample. I would only use micro-Raman Spectroscopy as a complementary tool to XRD (which is easier to calibrate for size-analysis) and electron microscopy; I do not believe it could be used as the sole method for a sample.
Thanks for all respected contributors to the present question. From the answers of respected contributors it seems that IR and Raman is eligible for such a task, but, another question rises: is it going to be as precise and easy as is the case for other common methods used for this purpose?
I think, Mudar, you sum it up quite well: It is theoretically possible, but since the spectra are influenced by a range of factors (including several size-dependent properties), I believe it would be difficult to get reliable data, depending on the material you wish to sample. I would only use micro-Raman Spectroscopy as a complementary tool to XRD (which is easier to calibrate for size-analysis) and electron microscopy; I do not believe it could be used as the sole method for a sample.
I think it is not possible by using the above spectroscopies. Particle size hardly influences the spectra. Both of them are used for qualitative and quantitative analysis. Particle size can be measured through any of the microscopy or some time even Powder X-ray diffraction.
Please read this article and references
http://m.phys.org/news/2014-09-sensor-tiny-individual-nanoparticles.html
Dear Karthikeyan
Thanks for your answer. Some theoretical works proofs that it is possible to determine differences in Raman or IR spectra as the particle size changes, however, experimentally it is more difficult to proof the same.
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