I want to take Raman for Graphene oxide solution. To do that, I planned to perform by placing a drop of graphene oxide in between two glass plates. is it a good method or bad method?
Dear SP
This is not a good method for taking Raman spectra of graphene oxide. Raman spectroscopy requires a laser to be focused on the sample, and the laser light must be able to interact with the sample. Placing a drop of graphene oxide between two glass plates will not allow the laser light to interact with the sample, and thus will not yield any useful data. A better method would be to deposit the graphene oxide onto a substrate, such as a silicon wafer, and then use a Raman microscope to focus the laser light onto the sample.
This is not a good idea to measure Raman spectra. I deposited my sample usually on a substrate (Au-decorated substrated for example).
Graphene oxide is soluble in water, organic solvents such as ethanol, and aqueous solutions of acids and bases. It can also be suspended in a variety of solvents, including water, ethanol, and dimethylformamide.
Well, I don't know specifically about graphene oxide, but I measure Raman and SERS spectra of droplets between microscopy slide and a coverslide (the weight of the coverslide is just enough to squeeze a couple-microliter droplet to a suitable thickness for measurement) all the time with good results.
Apart from this, you can obviously measure a free surface of the solution (maybe larger reservoir with flat surface would be better for this than just a droplet (the problems with curvature and fast evaporation in such a small volume).
In both cases, using objective with suitable working distance, you are free to dive into the liquid as deep as you will.
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