Abstract: A palm-size portable ?NMR relaxometer system for performing multi-step multi-sample chemical/biological assays, comprising a PCB having a CMOS ?NMR transceiver and a DMF device integrated thereon. A portable magnet has an inner gap configured to at least partially receive the DMF device. The DMF device comprises a platform of electrodes including a sensing site and receives one or more samples for analysis at an electrode and automatically transports the one or more samples on individual paths sequentially to the sensing site, for performing sensing on each sample sequentially. A Butterfly coil disposed on the PCB and underneath the DMF device and is at least partially received in the inner gap. The Butterfly coil excites the sample at the ?NMR sensing site by transducing a magnetic field produced at the sensing site to an electrical signal which is processed by the CMOS ?NMR transceiver to produce an analytical signal.

Abstract: A portable modular NMR-DMF system for performing chemical/biological assays. The system comprises a PCB having an NMR electronic circuit thereon, wherein the NMR electronic circuit includes a figure-8 shaped RF coil generating a plane-parallel magnetic field. A planar DMF chip comprises a platform comprising an array of electrodes, the array of electrodes including a sensing site located under the figure-8 shaped RF coil. A portable magnet is disposed parallel to the DMF chip and the RF coil. The array of electrodes is configured to receive a sample under detection, move the sample along the array, mix the sample with a probe in the form of at least one droplet with target-specific nanoparticles, and move the mixed sample to the sensing site. A magnetic field corresponding to the mixed sample under detection is produced at the sensing site. The figure-8 shaped RF coil acts to transduce the magnetic field produced at the sensing site to a voltage signal.

Abstract: A palm-size portable ?NMR relaxometer system for performing multi-step multi-sample chemical/biological assays, comprising a PCB having a CMOS ?NMR transceiver and a DMF device integrated thereon. A portable magnet has an inner gap configured to at least partially receive the DMF device. The DMF device comprises a platform of electrodes including a sensing site and receives one or more samples for analysis at an electrode and automatically transports the one or more samples on individual paths sequentially to the sensing site, for performing sensing on each sample sequentially. A Butterfly coil disposed on the PCB and underneath the DMF device and is at least partially received in the inner gap. The Butterfly coil excites the sample at the ?NMR sensing site by transducing a magnetic field produced at the sensing site to an electrical signal which is processed by the CMOS ?NMR transceiver to produce an analytical signal.