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Improving Nuclear Magnetic Resonance and Electron Spin Resonance Thermometry with Size Reduction of Superparamagnetic Iron Oxide Nanoparticles by Lin, Pei-Yun; Chalise, Darshan; Cahill, David G. is a scholarly article available to read on EtoBox.

What is Improving Nuclear Magnetic Resonance and Electron Spin Resonance Thermometry with Size Reduction of Superparamagnetic Iron Oxide Nanoparticles about?

Thermometry based on magnetic resonance has been extensively studied due to its important application in biomedical imaging. In our previous work, we showed that the spin-spin relaxation time (T2) of nuclear magnetic resonance (NMR) in water is a highly sensitive thermometer as T2 scales with the highly temperature-sensitive self-diffusion constant of water. In this work, in addition to temperature dependent self-diffusion constant of a fluid, we utilize the temperature dependent magnetization of 4 nm SPIONs to improve T2 sensitivity (4.96) by 1.4 times over self-diffusion (3.48) alone in hexane between 248 K and 333 K. To extend the application of NMR T2 thermometry to engineering systems, we also investigate the temperature dependence of T2 in mineral oil (Thermo Scientific, J62592), which exhibits remarkably high sensitivity (11.62) between 273 K and 353 K. This result implies that applications of NMR T2 thermometry in heat transfer fluids are promising. NMR thermometry, however, is generally not applicable to solids. Therefore, we also evaluate the potential of electron spin resonance (ESR) thermometry with SPIONs in solids between 100 K and 290 K, for potential temperature mon

Author

Lin, Pei-Yun; Chalise, Darshan; Cahill, David G.

Published

2024

Language

EN