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Related Experiment Videos

Implementing solenoid microcoils for wide-line solid-state NMR.

K Yamauchi1, J W G Janssen, A P M Kentgens

  • 1Department of Physical Chemistry/Solid-State NMR, NSRIM Center, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|February 28, 2004
PubMed
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New solid-state nuclear magnetic resonance (NMR) probeheads with microcoils offer high sensitivity for small samples. These advanced NMR tools enable the study of quadrupolar nuclei with large interactions.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Spectroscopy

Background:

  • Solid-state nuclear magnetic resonance (NMR) is crucial for analyzing solid samples.
  • Studying mass-limited samples requires highly sensitive NMR techniques.
  • Existing NMR probeheads face limitations with small sample sizes and high radiofrequency (RF) fields.

Purpose of the Study:

  • To develop and evaluate novel solid-state NMR probeheads utilizing solenoid microcoils.
  • To assess the performance, sensitivity, and RF characteristics of these microcoil probeheads for various nuclei.
  • To demonstrate the feasibility of using these probeheads for specific applications, including the study of quadrupolar nuclei.

Main Methods:

  • Fabrication of solenoid microcoils with inner diameters of 300-400 micrometers.

Related Experiment Videos

  • Mechanical ruggedness testing for ease of sample changing.
  • Performance evaluation of probeheads using (1)H, (31)P, and (27)Al nuclei in model compounds.
  • Characterization of sensitivity and RF properties under high RF power conditions.

    • Main Results:

    • Achieved high sensitivity, capable of detecting approximately 10(14) spins/sqrt Hz with a signal-to-noise ratio of 1 in a single scan.
    • Demonstrated the ability to generate extremely high RF fields (in excess of 1 MHz) using hundreds of Watts of RF power.
    • Successfully excited spectra of nuclei with large resonance line dispersions, including quadrupolar nuclei like (27)Al in minerals.

    Conclusions:

    • Developed microcoil-based solid-state NMR probeheads provide exceptional sensitivity for mass-limited samples.
    • The high RF fields generated are advantageous for studying nuclei with broad spectral features, such as quadrupolar nuclei.
    • These probeheads represent a significant advancement for solid-state NMR applications, particularly in materials science and geochemistry.