“…In many of these applications, ESRM could provide information complementary to that obtained by more common techniques such as fluorescence and atomic force microscopy. For example, ESR can be used to accurately map 0 2 concentration [2,9], reveal chemical specific information about reactive oxygen and nitrogen species [10][11][12], measure and image microviscosity [13], pH [14], and redox state [15]. All these parameters of interest were already measured with conventional "spectroscopic" ESR, as well as with large-scale ESR imaging machines and could therefore be acquired by ESRM measurements.…”