Svirinovsky-Arbeli, Asya, Dina Rosenberg, Daniel Krotkov, Ran Damari, Krishnendu Kundu, Akiva Feintuch, Lothar Houben, Sharly Fleischer, and Michal Leskes. “The Effects of Sample Conductivity on the Efficacy of Dynamic Nuclear Polarization for Sensitivity Enhancement in Solid State NMR Spectroscopy.” Solid State Nuclear Magnetic Resonance 99 (July 2019): 7–14.
In recent years dynamic nuclear polarization (DNP) has greatly expanded the range of materials systems that can be studied by solid state NMR spectroscopy. To date, the majority of systems studied by DNP were insulating materials including organic and inorganic solids. However, many technologically-relevant materials used in energy conversion and storage systems are electrically conductive to some extent or are employed as composites containing conductive additives. Such materials introduce challenges in their study by DNP-NMR which include microwave absorption and sample heating that were not thoroughly investigated so far.