Can Raman be applied at high/low temperatures, pressures or humidities?

Yes.  Specialised sample stages designed for microscopes can be used to allow Raman measurements to be made at high/low temperatures, pressures and humidities.  A range of stages are available:

A typical heating/cooling stage mounted on a microscope for Raman analysis
A typical heating/cooling stage mounted on a microscope for Raman analysis
  • Heating/Cooling – typically suitable for temperatures in the range -196oC to 600oC, or ambient to 1500oC, these stages can be used for solids, powders and liquids.
  • Catalysis – a variant of the heating/cooling stages above, but designed to have preheated gases forced through a catalyst matrix.  Suitable for temperatures up to 1000oC, and gas pressures up to 5bar.
  • Tensile Stress – allows structural changes in a sample to be monitored under tensile stress.  Forces up to 200N can be used with these stages.  Added heating/cooling from -196oC to 350oC ensure complete experimental control.
  • Pressure – Diamond Anvil Cells (DAC) allow analysis at pressures up to 50GPa, with elevated temperatures.
  • Humidity – control of sample temperature and humidity allows analysis of solvent-adsorbate interactions, and the effect of humidity on a sample’s structure.
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