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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.

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Related Experiment Video

Updated: May 30, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Note: High sensitivity pulsed electron spin resonance spectroscopy with induction detection.

Ygal Twig1, Ekaterina Dikarov, Wayne D Hutchison

  • 1Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel.

The Review of Scientific Instruments
|August 3, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed new microresonators for electron spin resonance (ESR) spectroscopy, significantly improving sensitivity. This breakthrough enhances detection capabilities for spin-based applications by over 100 times.

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Area of Science:

  • Physics
  • Spectroscopy
  • Materials Science

Background:

  • Commercial electron spin resonance (ESR) spectroscopy and imaging rely on induction/Faraday detection.
  • Current ESR detection sensitivity is limited to approximately 3 × 10^8 spins/√Hz.

Purpose of the Study:

  • To develop a novel detection method for electron spin resonance spectroscopy with significantly enhanced sensitivity.
  • To overcome the sensitivity limitations of conventional induction detection.

Main Methods:

  • Utilized novel surface loop-gap microresonators with an inner size of 20 micrometers.
  • Operated the microresonators at cryogenic temperatures and a magnetic field of 0.5 T.

Main Results:

  • Achieved spin sensitivities exceeding current barriers by more than two orders of magnitude.
  • Reached a sensitivity of approximately 1.5 × 10^6 spins/√Hz.
  • Demonstrated a spin sensitivity of approximately 2.5 × 10^4 spins for 1-hour measurements.

Conclusions:

  • The developed microresonator technology offers a substantial improvement in ESR detection sensitivity.
  • This advancement opens new possibilities for high-sensitivity spin detection in various scientific fields.
  • The new method surpasses the sensitivity limits of traditional induction detection.