EPR Imaging
Adding the Spatial Dimension to EPR
X-Band EPR Imaging (EPRI) extends conventional EPR spectroscopy by adding spatial information, allowing researchers to visualize the distribution of paramagnetic species, free radicals, and spin probes within a sample. Using magnetic field gradients applied at multiple orientations, EPR spectra are converted into projections that can be reconstructed into 1D, 2D, or 3D images. X-band EPRI operates around 9.8 GHz and is particularly well suited for:
- Materials science and defect analysis
- Polymer degradation studies
- Battery materials, Li deposition, and dendrite imaging
- Irradiation and aging studies
- Dynamic process tracking
- Oxygen and spin probe mapping
The technique combines the sensitivity and specificity of EPR with spatial resolution, making it a powerful tool for studying dynamic processes and heterogeneous samples. Available as an accessory for ELEXSYS E500 and E580 systems.
| Gradients | Directions | Gradient Strength | Water Cooling | 10” Magnet | Resonator | Compatibility with VT systems (LN2 and He) |
| 2D | Z, Y | 200 G/cm in Z-direction 170 G/cm in Y-direction | Yes | 72 mm air gap or 56 mm air gap with optional pole tips | ER4108TMHS | Yes |
| 3D | Z, Y, X | 40 G/cm | Yes | 100 mm air gap | ER4122SHQE | Yes |
Dedicated X-band Resonator for 2D Gradient Coils
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.
Features
- 9.8 GHz empty resonance
- 15 G maximum modulation amplitude
- 23 mm width in B0 direction
- Compatible with N2 and He variable temperature systems
- Optical window for sample irradiation
Application Areas of X-Band EPRI:
- Polymer degradation studies - visualize spatial distributions of radicals formed during UV exposure, thermal aging, and oxidative degradation of polymers
- Battery research - Image lithium deposits and dendrite formation within battery components and separators
- Materials science - Investigate defects, phase distributions, and radical formation in advanced materials
- Radiation and irradiation studies - Track radical generation and migration in gamma-irradiated and UV-exposed materials
- Oximetry (pO₂ mapping) - Measure and visualize oxygen concentration distributions using suitable paramagnetic probes
- Reactive oxygen species (ROS) mapping - Detect and localize ROS generation in chemical and biological systems
- Drug development and biomedical research - Study local microenvironments, probe distribution, and physiological parameters in in-vitro systems
- Dynamic process monitoring - Follow spatial changes in radicals and paramagnetic species during chemical reactions, aging, or degradation processes
- Structural analysis of heterogeneous samples - Reveal the spatial distribution of spin-containing species within complex materials.
Not Just Carbs, Pasta Goes Paramagnetic
AquaX 19 Bore Tube
From Gradient Projections to the Image Using BDPA Phantom
Acquire projections
Acquire a reference spectrum
Inspect the sinogram
Apply spectral deconvolution
Reconstruct image using filtered backprojection
More Information
LabScape
Service & Life Cycle Support for Magnetic Resonance and Preclinical Imaging
Bruker’s commitment to provide customers with unparalleled help throughout the buying cycle, from initial inquiry to evaluation, installation, and the lifetime of the instrument is now characterized by the LabScape service concept.
LabScape Maintenance Agreements, On-Site On-Demand and Enhance Your Lab are designed to offer a new approach to maintenance and service for the modern laboratory
