Electron Spin Resonance (ESR), also known as Electron Paramagnetic Resonance (EPR), is a powerful analytical technique used to detect, analyze, and characterize unpaired electrons in a substance. Depending on the state of the electrons in a substance, its properties and functions can be significantly different. This makes ESR particularly important in evaluating materials.
This technique can be applied to various substances in solid, liquid, or gas states, such as electronic materials, catalysts, and biological samples. Appropriate attachments can be used in combination with the basic instrument to perform a broad range of ESR techniques.
It is well established that even a few unpaired electrons can significantly affect a material’s properties, driving the need for ESR measurements with lower detection limits and improved sensitivity. JEOL has met this demand with the JES X3 series, which features a low-noise Gunn oscillator to deliver enhanced sensitivity.
Image Credit: JEOL USA, Inc.
New data acquisition and analysis functions provide a streamlined workflow from initial experiment selection to detailed final measurements.
- An improved auto-tuning feature improves reproducibility and reduces tuning time.
- Sequential measurements are fully customisable, with parameters such as sample temperature and microwave power set in either progressive or randomised sequences.
- An optional foot-operated trigger allows hands-free data collection to support time-sensitive experiments, minimising dead time after mixing reagents that generate short-lived radicals.
Major New Functions
- The intuitive operation interface is compatible with Windows 10™.
- Hands-free measurement initiation is available via a foot switch.
- Sequential measurement parameters can be set using either progressive or randomized values.
- The JES-X3 offers improved visualization of multi-dimensional data.
- The device can batch process sequentially measured data, including background subtraction.
Major Features
- Standard universal cavity features a high-transmittance optical window for photo-irradiated radical detection.
- Auto-tuning offers high stability.
- All attachments are designed for easy installation and removal.
Available Models
Source: JEOL USA, Inc.
| |
Pole Diameter |
Pole Gap |
Max. Field (T) |
Homogeneity |
Sensitivity |
| JES-X310 |
15 cm |
60 mm |
0.65 |
5 x 10-6 |
5 x 109 spins / 10-4 T
(at 100 kHz modulation) |
| JES-X320 |
24 cm |
62 mm |
1.30 |
5 x 10-6 |
5 x 109 spins / 10-4 T
(at 100 kHz modulation) |
| JES-X330 |
36 cm |
75 mm |
1.40 |
5 x 10-6 |
5 x 109 spins / 10-4 T
(at 100 kHz modulation) |
Image Credit: JEOL USA, Inc.