Is there any restriction on recording range e. g. can micro Raman measure Raman shift below 200 cm-1?
Restrictions to measure raman shift below 200 cm-1 by micro raman spectrsopcy depend on your interferential filter (edge filter or notch filter). It's now possible to obtain raman shift down to 5 cm-1 with special edge filter (i don't remember the name), but there is no problem to measure raman shift in the range 100 cm-1 to 200 cm-1.
Hi, Find an article in the attachment. Hope it helps a little to you.
Second attachment and find the link below :
http://onlinelibrary.wiley.com/doi/10.1002/masy.200550503/abstract
The term "micro" mean that you laser pass through a microscope (objective X50 or X100) and that you are able to analyze surface of the order of 3 to 6 microns of diameter. It does not depend on the size of your sample.
In Micro-Raman, Laser light can be focused on the sample through a microscope lens at allows for the analysis of very small regions (down to 1 micrometer diameter). That is a very convenient situation when dealing with highly inhomogeneous samples where a study performed on a macroscopic area would contain signals from many different components. Small grains are often made of a single or a few components thus the interpretation of the spectrum is much simpler.
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