Key points are not available for this paper at this time.
C nuclei in powdered microdiamonds at low fields, increasing the DNP enhancement from 30 to 100 measured with respect to the thermal signal at 7T. For low concentrations of broad linewidth electron radicals e.g., TEMPO ((2,2,6,6-tetramethylpiperidin-1-yl)oxyl), these multiplicative gains could exceed an order of magnitude.
Ajoy et al. (Tue,) studied this question.