Wearable Nuclear Magnetic Resonance Spectroscopy System to Detect Stress and Viral Biomarkers, and Illicit Drugs Non-Intrusively In Vivo

This paper reports on a low power 1H-NMR sensor capable of detecting biomarkers and chemicals in the blood flowing through fingers. It uses a trampoline magnetometer, and coils to non-intrusively detect chemicals with unpaired nuclei such as 1H. Molecular electrons shield the external fields by different amounts in different chemicals enabling their unique identification by the Larmor precession frequencies (ωLarmour) of their 1H nuclei. The NMR described here uses high sensitivity, high-Q, 100 kHz - 400 kHz resonant trampoline magnetometers with relative immunity to acoustic noise.