Raman-Spektroskopie
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
- 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.
