Difference between revisions of "Raman microscope"
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=== Significance === | === Significance === | ||
<swf width="500" height="400">images/7/7f/Ramanmic.swf</swf> | |||
Micro Raman spectroscopy is a useful technique for determining the number of layers of small samples of graphene. | Micro Raman spectroscopy is a useful technique for determining the number of layers of small samples of graphene. | ||
Revision as of 14:31, 15 June 2011
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Overview
The Confocal Raman microscope is an optical microscope through which an monochromatic laser source is directed at a sample. The sample absorbs energy and scatters the light at different wavelengths which is then read with a CCD camera. Raman is based inelastic scattering due to characteristic vibrational modes of the material being studied.
File:Raman energy levels.svg
Energy level diagram showing the states involved in Raman signal. The line thickness is roughly proportional to the signal strength from the different transitions.
Significance
<swf width="500" height="400">images/7/7f/Ramanmic.swf</swf>
Micro Raman spectroscopy is a useful technique for determining the number of layers of small samples of graphene.