I have been working on 1D and 2D materials; now, I would like to measure the vibrational properties using the Raman spectroscopy of these samples in the liquid state measurement.
Akash Gupta
Raman spectroscopy is a light scattering technique, so all that is required to collect a spectrum is to direct the incident beam directly at the sample and then collect the scattered light. The thickness of the sample does not cause problems for Raman spectroscopy (in contrast to IR spectroscopy when analyzing samples for transmission), and the surrounding atmosphere makes an insignificant contribution to the Raman spectra. Therefore, there is no need to evacuate or dry the sample cell compartment. Glass, water, and plastic packaging themselves have very weak Raman spectra, which makes the method even easier to use. Samples can often be analyzed directly in a glass bottle or plastic bag without opening the package and without risk of contamination. The aqueous solutions are ready for analysis, no water removal is required to analyze the dissolved sample, and since atmospheric humidity is irrelevant, there is no need to purge the spectrometer. Moreover, there are no two molecules that have the same Raman spectra, and the intensity of the scattered light is related to the amount of matter. This makes it easy to obtain both quantitative and qualitative information about the sample, makes it possible to interpret the spectrum, process the data using computer methods of quantitative analysis.
Hi Akash,
Sample preparation for Raman is very simple. Disperse a small amount of sample in a solvent in which the sample is soluble, and place the solution in a sample holder. Ideally, do different tests at various proportions and contrast the result with that of the solvent alone. There are times when the signal is not very strong and you have to increase your concentration a bit.
Hi Akash,
Sample preparation for Raman is very simple. Disperse a small amount of sample in a solvent in which the sample is soluble, and place the solution in a sample holder. Ideally, do different tests at various proportions and contrast the result with that of the solvent alone. There are times when the signal is not very strong and you have to increase your concentration a bit.
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