A Comparison of Induction-Detection NMR and Force- Detection NMR on Micro-NMR Device Design

Nuclear Magnetic Resonance (NMR) is widely used in medical diagnostics and chemical analysis. Due to rapid growing of the NMR applications, the conventional NMR systems may not fulfill the need of all applications. The development of a micro-NMR device would not only benefit the original NMR applications but could also open a door for new NMR applications. Two approaches for building a NMR system, Induction-Detection Nuclear Magnetic Resonance (IDNMR) and Force-Detection Nuclear Magnetic Resonance (FDNMR) are explored and compared in this paper. The comparison result shows that the FDNMR approach outperforms the IDNMR approach in signal-to-noise ratio when the sample radius is below 410 mm for protons and 1900 mm for chlorides. This suggests that the FDNMR approach is more appropriate for making the micro-NMR device.