Stc.unm

Abqmr, Inc.

Sandia Corporation

National Technology & Engineering Solutions of Sandia, LLC

Todd M Alam

Andrew Frederick McDowell

Laurel Sillerud

Eric G Sorte

Mark S Conradi

Brennan J Walder

Electrochemical devices with metal casings have been considered incompatible with nuclear magnetic resonance (NMR) spectroscopy because the oscillating magnetic fields ('rf fields') responsible for excitation and detection of NMR active nuclei do not penetrate metals. According to the present invention, rf fields can still efficiently penetrate into nonmetallic layers of electrochemical cells (such as a coin cell battery configuration) provided the magnetic field is oriented tangentially to the electrochemical cell electrodes in a 'skimming' orientation. As an example, noninvasive high field in situLi andF NMR of an unmodified commercial off-the-shelf rechargeable coin cell was demonstrated using a traditional external NMR coil setup. The in operando NMR measurements revealed that irreversible physical changes accumulate at the anode during electrochemical cycling.

Probe for operando in situ electrochemical nuclear magnetic resonance spectroscopy

A biological detector includes a conduit for receiving a fluid containing one or more magnetic nanoparticle-labeled, biological objects to be detected and one or more permanent magnets or electromagnet for establishing a low magnetic field in which the conduit is disposed. A microcoil is disposed proximate the conduit for energization at a frequency that permits detection by NMR spectroscopy of whether the one or more magnetically-labeled biological objects is/are present in the fluid.

Biological detector and method

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Cedar Crest, NM, United States of America

Todd M Alam