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    Electron Spin Resonance (ESR) Spectroscopy - NUS Chemistry ...
    Electron Spin Resonance (ESR) or Electron Paramagnetic Resonance (EPR) spectrometers, such as the JEOL JES X3 series, are non-destructive analytical tools used to study materials with unpaired electrons, such as free radicals, transition metal ions, and defects in solids. These instruments detect and characterize paramagnetic species in solids, liquids, or gases, essential for analyzing catalysts, polymers, and electronic materials. 
    Key Applications in Material Science 
    • Defect Analysis: Used for identifying defects in semiconductors and solid-state materials.
    • Polymer and Chemical Research: Analyzes free radicals in polymerization processes and monitors UV stability in polymers and coatings.
    • Catalysis: Studies paramagnetic centers in catalysts to understand their performance.
    • Carbon Materials: Analyzes the magnetic properties of carbon-based materials.
    • Environmental and Energy Materials: Evaluates environmentally persistent free radicals (EPFRs) in materials and studies battery materials. 
    Key Features of Modern ESR Spectrometers 
    • High Sensitivity: Modern instruments like the Rotunda Scientific ESR5000 offer high sensitivity for detecting low concentrations of radicals.
    • Operando Studies: Enables tracking of chemical or physical processes in real-time.
    • Wide Temperature Range: Accessories allow measurements at temperatures ranging from cryogenic to high temperatures.
    • Versatile Imaging: Advanced systems provide mapping of paramagnetic centers within materials. 
    Common Manufacturers and Models 
    • JEOL Ltd.: Known for the JES X3 series and FA series.
    • Bruker: Produces a wide range of EPR spectrometers (e.g., EMXplus, ELEXSYS).
    • CIQTEK: Known for industrial and laboratory ESR spectrometers. 
    ESR is a vital tool for materials scientists studying magnetism, catalytic activity, and structural integrity of new materials. 
    • Electron paramagnetic resonance - Wikipedia
      Applications. This low-temperature ESR-STM in the Center for Quantum Nanoscience is one of the first STMs globally to measure elec...
      Wikipedia
    • ESR of Material−Carbon | Applications Notes - JEOL Ltd.
      ESR of Material−Carbon | Applications Notes | JEOL Ltd. * Products. Scientific. Scientific Instruments. Electron Microscope Genera...
      JEOL Ltd.
    • Electron Spin Resonance Spectrometer (ESR) | Products - JEOL
      ESR is a method for observing the behavior (dynamics) of the electrons within a suitable molecule, and for analyzing various pheno...
      JEOL Ltd.
    Show all
    • Electron paramagnetic resonance - Wikipedia
      Applications. This low-temperature ESR-STM in the Center for Quantum Nanoscience is one of the first STMs globally to measure elec...
      Wikipedia
    • ESR of Material−Carbon | Applications Notes - JEOL Ltd.
      ESR of Material−Carbon | Applications Notes | JEOL Ltd. * Products. Scientific. Scientific Instruments. Electron Microscope Genera...
      JEOL Ltd.
    • Electron Spin Resonance Spectrometer (ESR) | Products - JEOL
      ESR is a method for observing the behavior (dynamics) of the electrons within a suitable molecule, and for analyzing various pheno...
      JEOL Ltd.
    • Understanding ESR/EPR Spectroscopy: Principles ...
      Sep 4, 2025 — Increasingly employed in environmental science, the ESR5000 measures free radicals in airborne particulates, water, and soil. This...
      Rotunda Scientific Technologies LLC
    • ESR Spectrometer | Electron Spin Resonance - JEOL USA Inc.
      Much better sensitivity using 'High Sensitivity Mode' Electron Spin Resonance (ESR), also known as Electron Paramagnetic Resonance...
      JEOL USA Inc.
    • esr spectrometers - CIQTEK
      Dec 28, 2023 — In the field of analytical instrumentation, both Electron Spin Resonance (ESR) spectrometers and Nuclear Magnetic Resonance (NMR) ...
      CIQTEK
    • Electron Spin Resonance (ESR)
      Nov 29, 2010 — my name is Aayan Ponsan and this is Norolk State's um center for material research lab. and this lab is actually our electron spin...
      5:20
      YouTube·cmditr
    • Electron Spin Resonance Spectrometer (ESR)
      ESR spectrometers have been widely used in studies of biological organisms and semiconductors, and used to measure magnetic proper...
      岐阜大学
    • Electron Spin Resonance Spectrometer (ESR - JEOL) - saif@iitb.ac.in
      Electron Spin Resonance, ESR, is a powerful non-destructive and non-intrusive analytical method. ESR yields meaningful structural ...
      saif@iitb.ac.in
    • Electron Spin Resonance (ESR) - Photon Center
      Material Analysis: ESR is used to identify properties of various materials, including metals, polymers, and organic compounds. Fre...
      Photon Center
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    Web results

    Electron Spin Resonance Spectrometer (ESR)


    JEOL Ltd.
    https://www.jeol.com › products › science › esr
    JEOL Ltd.
    https://www.jeol.com › products › science › esr
    With an ESR instrument, a static magnetic field and microwaves are used to observe the behavior of the unpaired electrons in the material being studied. The ...Read more
    Videos
    How we built an EPR Spectrometer in the lab - ESR ...
    YouTube · Systemic Creative
    Mar 13, 2024
    YouTube · Systemic Creative
    31:54
    Build a continuous wave radio frequency EPR spectrometer using Helmholtz coils, RF signal generator, directional coupler, coupling loop, electrical resonator, modulation coils, and a lock-in amplifier.
    Systemic Creative
    YouTube·
    Mar 13, 2024

    How we built an EPR Spectrometer in the lab - ESR ...

    YouTube·Systemic Creative·Mar 13, 2024
    YouTube
    In this video
    • 00:00
      Intro
    • 00:54
      EPR Theory
    • 03:36
      Circuit Diagram
    • 07:24
      Instrumentation and Components
    • 11:30
      3D Design in Autodesk Inventor
    • 13:59
      Differential Screw and Machining
    • 16:45
      Resonator Design and Build
    • 19:39
      How it Works
    • 21:19
      Lock-In Amplifier and Signal
    • 26:45
      Demo - Critical Coupling
    • 28:35
      Demo - Measurement
    Electron Spin Resonance (ESR)
    YouTube · cmditr
    Nov 29, 2010
    YouTube · cmditr
    5:20
    ESR spectroscopy uses a strong magnetic field and electromagnetic radiation to analyze paramagnetic materials with a spin greater than zero.
    cmditr
    YouTube·
    Nov 29, 2010

    Electron Spin Resonance (ESR)

    YouTube·cmditr·Nov 29, 2010
    YouTube
    In this video
    • 00:15
      What is ESR?
    • 00:39
      ESR Machine
    • 01:03
      Sample Cavity
    • 01:18
      ESR sample
    • 01:33
      ESR sample cavity
    • 02:41
      Tuning the signal
    • 03:05
      Calibrating the ESR signal
    • 03:52
      Analyzing the signal
    • 04:46
      Conclusion
    RESONANCE SPECTROSCOPY L.4.10 ESR Instrumentation ...
    YouTube · Dr.A JOHN PETER
    Apr 10, 2025
    YouTube · Dr.A JOHN PETER
    13:54
    An ESR spectrometer uses a static magnetic field & microwaves to observe unpaired electrons. Key parts: magnet, microwave source, sample cavity, detector.
    Dr.A JOHN PETER
    YouTube·
    Apr 10, 2025

    RESONANCE SPECTROSCOPY L.4.10 ESR Instrumentation ...

    YouTube·Dr.A JOHN PETER·Apr 10, 2025
    YouTube
    View all

    Web results

    ESR Spectrometer | Electron Spin Resonance | Supplier


    JEOL USA Inc.
    https://www.jeolusa.com › PRODUCTS › Electron-Spin...
    JEOL USA Inc.
    https://www.jeolusa.com › PRODUCTS › Electron-Spin...
    A powerful analytical method to detect, analyze and determine the characteristics of unpaired electrons in a substance.Read more

    Understanding ESR/EPR Spectroscopy: Principles, ...


    Rotunda Scientific Technologies LLC
    https://www.rotundascitech.com › blogs › exploring-appl...
    Rotunda Scientific Technologies LLC
    https://www.rotundascitech.com › blogs › exploring-appl...
    Sep 4, 2025 — Researchers use ESR to detect reactive oxygen and nitrogen species (ROS/RNS), nitric oxide, and radical-generating systems, as well as spin- ...Read more

    esr spectrometers


    CIQTEK
    https://www.ciqtekglobal.com › blog › esr-spectrometer...
    CIQTEK
    https://www.ciqtekglobal.com › blog › esr-spectrometer...
    Dec 28, 2023 — Electron Paramagnetic Resonance (EPR) or Electron Spin Resonance (ESR) spectroscopy is a powerful analytical technique that plays a vital role ...Read more

    Bruker Elexsys II X-band Electron Spin Resonance (ESR/EPR ...


    Stavropoulos Center for Complex Quantum Matter
    https://quantummatter.nd.edu › instruments › bruker-el...
    Stavropoulos Center for Complex Quantum Matter
    https://quantummatter.nd.edu › instruments › bruker-el...
    ESR is a powerful tool to study conducting electrons, as well as localized spin centers. It can thus yield direct information regarding the nature of the spin ...Read more

    ESR/EPR Spectrometers Information


    GlobalSpec
    https://www.globalspec.com › learnmore › esrepr_spect...
    GlobalSpec
    https://www.globalspec.com › learnmore › esrepr_spect...
    ESR/EPR Spectrometers measure the spectrum produced by the magnetic energy level transitions of electrons having a net spin and orbital angular momentum.Read more

    Micro-ESR: Miniature Electron Spin Resonance ...


    American Laboratory
    https://www.americanlaboratory.com › 1664-Micro-ESR...
    American Laboratory
    https://www.americanlaboratory.com › 1664-Micro-ESR...
    Apr 1, 2011 — An ESR spectrometer detects the concentration and composition of free radicals present in a sample. Free radicals are atomic or molecular ...Read more

    ESR spectrometers using electromagnetic horns


    ScienceDirect.com
    https://www.sciencedirect.com › science › article › pii
    ScienceDirect.com
    https://www.sciencedirect.com › science › article › pii
    by H Ohya-Nishiguchi · 1986 · Cited by 6 — A new ESR spectrometer using electromagnetic horns has been developed for practical applications to biological or material sciences.Read more

    EPR Instruments - Electron Paramagnetic Resonance


    Bruker
    https://www.bruker.com › products-and-solutions › epr...
    Bruker
    https://www.bruker.com › products-and-solutions › epr...
    Discover Bruker's high-performance portfolio of electron paramagnetic resonance instruments. EPR research covers many areas, see how Bruker can help today.
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