Results 261 to 270 of about 2,700,521 (330)

Spintronic sensors for NMR and MRI

Spintronics XII, 2019
Giant magnetoresistive sensors (GMR) and tunnel magnetoresistive sensors (TMR) can be efficiently used to detect weak magnetic signals corresponding to the field created by the precession of nuclear spins. In this paper, we present two experiments with their advantages and limitations.
Doll, Andrin, Lecurieux Lafayette, Samson, Moulin, Juien, Chopin, Chloé, Jasmin-Lebras, Guenaelle, Pannetier-Lecoeur, Myriam, Solignac, Aurélie, Fermon, Claude   +7 more
openaire   +2 more sources

Silicon RF NMR biomolecular sensor - review

Proceedings of 2010 International Symposium on VLSI Design, Automation and Test, 2010
This paper reviews our first miniature nuclear magnetic resonance (NMR) system originally reported in [1], [2], which, weighing only 2 kg, is 60 times lighter, 40 times smaller, yet 60 times more spin mass sensitive than a 120-kg state-of-the-art commercial benchtop NMR system.
Nan Sun, Yong Liu, Hakho Lee, Ralph Weissleder, Donhee Ham   +4 more
openaire   +1 more source

Nanoscale NMR Spectroscopy Using Nanodiamond Quantum Sensors

Physical Review Applied, 2020
While conventional nuclear magnetic resonance (NMR) spectroscopy is widely used for chemical analysis of macroscopic sample volumes, quantum NMR sensors based on nitrogen-vacancy (N-V) centers in bulk diamond have brought NMR spectroscopy to the nanoscale, demonstrating single-nucleus sensitivity and chemical structure determination.
Jeffrey Holzgrafe, Qiushi Gu, Jan Beitner, Dhiren M. Kara, Helena S. Knowles, Mete Atatüre   +5 more
openaire   +1 more source

A novel approach of 19F NMR based sensor

Research Journal of Chemistry and Environment, 2023
Reliable and precise methods are to be applied ranging from biological field to diagnosis and quality control to identify target analytes in samples. Nuclear magnetic resonance (NMR) is a strongly recommended process that is suitable for collecting data multidimensionally at molecular and atomic levels.
Amit Kumar Khandelwal, Poonam Hariyani, Barkha Shrivastava   +2 more
openaire   +1 more source

NMR hand-held moisture sensor

Magnetic Resonance Imaging, 2001
An open magnet design, hand-held NMR sensor head is presented. Wood moisture content and cement hydration tests demonstrate the potential of the tool for in-situ material assessment. The magnetic field distribution was adjusted by positioning blocks of permanent magnets using millimeter scale 3-dimensional magnetic field modeling.
openaire   +2 more sources

Single-sided sensor for high-resolution NMR spectroscopy

Journal of Magnetic Resonance, 2006
The unavoidable spatial inhomogeneity of the static magnetic field generated by open sensors has precluded their use for high-resolution NMR spectroscopy. In fact, this application was deemed impossible because these field variations are usually orders of magnitude larger than those created by the microscopic structure of the molecules to be detected ...
J, Perlo, F, Casanova, B, Blümich
openaire   +2 more sources

RF Sensor of a Novel NMR Apparatus

Journal of Electromagnetic Waves and Applications, 1993
A novel NMR instrument to be used in holes drilled for geophysical exploration employs an unusual RF sensor which resembles one half of a coaxial cable that is split along its axis. The magnetic field and the efficiency of the sensor are computed by the method of moments.
A. Sezginer, D.D. Griffin, R.L. Kleinberg, M. Fukuhara, D.G. Dudley   +4 more
openaire   +1 more source

Spatial Localization with Single-Sided NMR Sensors

Applied Magnetic Resonance, 2007
In the last years, special effort has been made to achieve spatial localization with single-sided nuclear magnetic resonance systems. The implementation of three-dimensional imaging techniques on such sensors converted the tool in a truly noninvasive open tomograph useful to resolve the structure of arbitrary large samples.
J. Kolz, N. Goga, F. Casanova, T. Mang, B. Blümich   +4 more
openaire   +1 more source

Velocity distributions remotely measured with a single-sided NMR sensor.

Journal of Magnetic Resonance, 2004
The pulsed field gradient nuclear magnetic resonance (PFG NMR) method has proved to be a powerful non-invasive technique to measure molecular displacement in various systems. It has been largely implemented with conventional NMR magnets where the volume for housing the flow setup is restricted.
F. Casanova, J. Perlo, B. Blümich
semanticscholar   +3 more sources

Comparison of Lanthanide Macrocyclic Complexes as ²³Na NMR Sensors

Analytical Chemistry, 2022
Nuclear magnetic resonance (NMR) agents, composed of paramagnetic lanthanide ions (Ln3+) complexed with negatively charged cyclic chelating agents (Che(n+3)-) forming polyanionic lanthanide complexes (LnChen-), perturb sodium-23 (23Na) signals, a phenomenon which depends sodium ions (Na+) exchanging with LnChen-.
Muhammad H. Khan, Sandeep Kumar Mishra, A. B. M. Zakaria, Jelena M. Mihailović, Daniel Coman, Fahmeed Hyder   +5 more
openaire   +2 more sources