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Scanning Confocal Raman spectroscopy (+AFM)

Conventional mode (Laser excitation wavelengths of 488, 532 and 633 nm):

  • High-pass filters have signal cutoff below ~100 cm-1.
  • No anti-Stokes Raman scattering.

Rayshield mode (Laser excitation wavelength of 532 nm):

  • Two volume Bragg gratings produce narrow cutoff within [-10, 10] cm-1.
  • Capable of displaying the anti-Stokes and Stokes Raman scattering simultaneously.
  • Requires a separate training session.

AFM AC- and Contact-modes:

  • Useful for quick large-scale topographical analysis.
  • Small-scale analysis is limited to ~25 nm/px resolution because of acoustic and mechanical vibrations.
  • The area of interest (in Raman) can be AFM-imaged in less than ~30 min.
  • Requires a separate training session.

 

Tool name:
Micro-Raman
Area/room:
M2 F13 Analysis Lab
Category:
Characterization
Manufacturer:
WITec
Model:
WITec alpha300 RA

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