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Raman Microscopy - simple question

  1. May 28, 2008 #1
    What's the best way to hold a sample of micron-sized polystyrene beads for raman microscopy?
     
  2. jcsd
  3. Jun 2, 2008 #2

    chemisttree

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    My first attempt would be carbon tape of the type used in electron microscopy. Other than that, you might try to get one to sit still enough on a roughened glass slide. There should be enough confinement in the rough part of a glass slide to hold one still. I can tell you from experience that the rough glass slide won't hold micron-sized silicate particles still in the EM... too much charging and the particle flys off to find something to dump it's extra electrons onto.
     
  4. Jun 2, 2008 #3
    roughened glass? Wouldn't that diffract my focussed input beam? I'm thinking of either 'optically trapping' it, or just placing it in a drop of water on a microscope slide. Also, does anyone know by anychance why they use water in specific?
     
  5. Jun 2, 2008 #4

    chemisttree

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    See here. Visualizing the roughened surface of a diamond file, for example, is one of the applications of raman microscopy.
     
  6. Jun 2, 2008 #5
    I think that was more too do with Spontaneous Raman Microscopy. In which case the slide preparation isn't as important as Coherent Antistokes Raman Microscopy - which is what I'm doing.
     
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