SNOM combines interesting features of light microscopy and scanning microscopic methods, therefore providing high resolutions (nano structural). But there are not as many examples of it in articles as it should. I want to know the reason behind it.
The advantage of a SMOM over non-optical scanning probe methods is that conventional contrast microscopy techniques can be used, the sample can be examined nondestructively, and chemical information about the sample can be obtained, e.g. Raman effect signals in tip-enhanced Raman spectroscopy (TERS).
Disadvantages of SNOM are:
The high costs, because in addition the scanning probe method must be applied. Difficulties in evaluating the data obtained (occurrence of artifacts). Still existing theoretical problems of the description of contrast formation. That may be the reasons why the SNOM has not yet appeared so widespread.
Best regards,
Guenter Grundmann
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