Fig. 5
Concentration of Resorufin formed under α-rays as a function of dose delivered to solution. In black, without GNP; in red, with GNP of 6 nm at concentration of 1 nM. Dose rate was deduced, considering an empirical exponential growth of the Resorufin. N2O saturated solution of Ampliflu® Red was used at a concentration of 5 × 10−5 M in phosphate buffer. The initial rate shows a ratio of 2.2 between the slopes in solutions in presence and in absence of GNP