The natural line width of low field nuclear magnetic resonance spectra

Harcken, Hans; Ketzler, Rainer; Albrecht, M.; Burghoff, M.; Hartwig, Stefan; Trahms, Lutz

doi:10.1016/j.jmr.2010.06.008

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…A Gaussian fit reveals a full-width-at-half-maximum (FWHM) of 0.65±0.05 Hz. While a substantial improvement over previous studies, this is broader than the expected natural linewidth of water under our experimental conditions, ∼0.1 Hz [27]. We attribute the discrepancy to residual temporal instability in B 0 (Sec.…”

Section: Sensitivity and Spectral Resolutioncontrasting

confidence: 63%

Two-dimensional nuclear magnetic resonance spectroscopy with a microfluidic diamond quantum sensor

et al. 2019

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Quantum sensors based on nitrogen-vacancy centers in diamond have emerged as a promising detection modality for nuclear magnetic resonance (NMR) spectroscopy owing to their micrometer-scale detection volume and noninductive-based detection. A remaining challenge is to realize sufficiently high spectral resolution and concentration sensitivity for multidimensional NMR analysis of picoliter sample volumes. Here, we address this challenge by spatially separating the polarization and detection phases of the experiment in a microfluidic platform. We realize a spectral resolution of 0.65 ± 0.05 Hz, an order-of-magnitude improvement over previous diamond NMR studies. We use the platform to perform two-dimensional correlation spectroscopy of liquid analytes within an effective ∼40-picoliter detection volume. The use of diamond quantum sensors as in-line microfluidic NMR detectors is a major step toward applications in mass-limited chemical analysis and single-cell biology.

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Section: Sensitivity and Spectral Resolutioncontrasting

confidence: 63%

Two-dimensional nuclear magnetic resonance spectroscopy with a microfluidic diamond quantum sensor

et al. 2019

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“…All characterization measurements are carried out within the Physikalisch-Technische Bundesanstalt (PTB)'s active EMF compensation (Zikmund et al, 2015b), which reduces the local EMF value of about 49 µT to a background field of less than 20 nT. We use an NMR technique on protons, and the free induction decay (FID) on water samples (Slichter, 1996;Harcken et al, 2010) to measure the scalar magnetic flux density B generated by the 3D coil system. The NMR probe consists of a 40 mm glass sphere filled with highly purified water.…”

Section: Measurements With Nmrmentioning

confidence: 99%

Three-dimensional coil system for the generation of traceable magnetic vector fields

Rott

Lüdke

Ketzler

et al. 2022

J. Sens. Sens. Syst.

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Abstract. A precise and efficient way to calibrate 3D magnetometers is by utilizing triaxial coil systems. We describe the development and characterization of a 3D coil system that generates magnetic flux densities up to 2 mT in arbitrary field direction. Coil parameters, such as coil constants and the misalignment of its spacial axes are determined with nuclear magnetic resonance (NMR) techniques, ensuring traceability to SI standards. Besides the generation of a constant magnetic field inside a sphere of radius 1 cm in the center of the coil, the 3D coil system enables the realization of gradient and saddle field profiles, which allow a precise estimate of sensor positions in 3D. Fluxgate and Hall sensor measurements are carried out to characterize the quality of the generated magnetic fields. The homogeneity achieved the orthogonality, and the position and structure of the saddles are determined experimentally and compared to calculated values.

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A Superconducting Quantum Interference Device Measurement System for Ultra Low-Field Nuclear Magnetic Resonance

et al. 2012

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The natural line width of low field nuclear magnetic resonance spectra

Cited by 5 publications

References 13 publications

Two-dimensional nuclear magnetic resonance spectroscopy with a microfluidic diamond quantum sensor

Two-dimensional nuclear magnetic resonance spectroscopy with a microfluidic diamond quantum sensor

Three-dimensional coil system for the generation of traceable magnetic vector fields

A Superconducting Quantum Interference Device Measurement System for Ultra Low-Field Nuclear Magnetic Resonance

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