Nuclear Magnetic Resonance Force Detection Using a Micro-Glass-Tube Resonator

Nuclear magnetic resonance (NMR) forces successfully actuated a micro fluidic resonator filled with water. The microtube of glass was driven under a gradient magnetic field by irradiating the microtubes containing protons with RF (4 – 24 MHz) waves modulated at the resonance frequency <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\sim 3.4 \ \text{kHz})$</tex> of the microtube. The actuation force of 1.25 pN based on NMR when irradiated with an RF wave of 14 MHz, which is theoretically consistent. This has opened up the possibility of NMR detection based on a new principle of measuring NMR using the vibration of the resonator.