with either 100 ppm of DDA, 100 ppm of Brij-35 or a 50 ppm:50 ppm mixture of the two surfactants in dodecane. In a different set, these simulations were repeated in the presence of a small amount (100 ppm) of molecular water. Further details are provided in the method section, The results of these simulation, as summarized in Figure ), show that DDA can form weak dimers or trimers in dodecane. While Brij-35 forms a few dimers in dodecane, larger complexes are formed when DDA and Brij-35 are present together, in which the DDA clusters around Brij-35. These DPD-MD simulations also allow an estimate of the time (𝑡 + ) of formation of an aggregate and the time (𝑡 -) to its dissolution. The ratio (𝑡 -/𝑡 + ) is thus a measure of the stability of the aggregates, which is very low for both pure DDA (0.002) and pure Brij-35 (0.001) but is rather high (0.3 to 0.7) for the mixture of the anionic and nonionic surfactants. Overall, we see the picture developed from the UV spectroscopy contrasts positively with that obtained from the DPD-MD simulations in that an aggregated structure formed from a mixture of the ionic and non-ionic surfactants is more stable than those of the pure surfactants.