“…Diffusion kinetics in biological tissues have been investigated for decades ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ). Quantification of such transport phenomena is pivotal to pharmacology ( 9 , 10 , 11 ), cryopreservation ( 12 , 13 , 14 ), metabolism and cell signaling studies ( 1 , 2 , 3 , 5 , 6 ), food science ( 15 , 16 ), sample preparation ( 11 ), and medical diagnostics ( 17 , 18 , 19 ). On the macroscopic scale, magnetic resonance imaging ( 20 , 21 ), attenuated total reflection spectroscopy ( 14 , 22 ), and permeation into acceptor reservoirs ( 6 , 9 ) are the predominant analytical techniques.…”