X-band EPR Imaging is a powerful technique combining sub-mm spatial resolution and the specificity of EPR. To help exploit these features, Bruker Biospin has developed the high power X-band gradients as an accessory to the ELEXSYS E-500.
EPR imaging is utilized in several
research areas where the high sensitivity available at X-band is
exploited to obtain high spatial resolution EPR Images. In materials
research endogenous free-radicals are monitored during material
treatment. In the biomedical field, EPR images are used in dermatology,
cardiology, and cellular biology. Critical in each of these fields is
achieving the highest spatial resolution possible.
The decreased air gap available with the X-band high power gradient
coils necessitates a slim design resonator: the ER 4108 TMHS. This
specially designed resonator fits the narrow air gap available while
maintaining a high sensitivity.
EPR imaging of natural and synthetic diamonds is used to locate the paramagnetic centers within the crystals. The set of EPR images below show two orientations of the same yellow diamond where in the right images the diamond has been rotated by 90°. Using the high power X-band gradients (top) allows improved localization of the paramagnetic centers as compared to low power gradients (bottom).
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