Excess Entropy of Janus Particles Immersed in Hydrogen Bonding Fluids

Rich aggregation states and phase behavior of Janus particles can be observed in various solvents because of its characterized features, which is closely related to its excess entropy in solution. For the mixture of Janus particles immersed in a hydrogen-bonding(HB) fluid, we presented the excess entropy of a Janus particle in the limit of dilute solution. This investigation was performed by means of the density functional theory for classical fluids. With the aid of local density profiles of HB fluid around the Janus particle under various conditions, the pair correlation functions were given and then were employed to calculate the excess entropy. Furthermore, the effect of interactions between Janus particle and HB fluid, bulk density of HB fluid, HB strength and HB functionality on the excess entropy was elucidated. An attempt was made to find the dependence of the excess entropy on these factors such that the driving force of the assembly of Janus particles can be quantitatively presented. As a result, it is expected that such an effort can provide useful clues to investigate aggregation of Janus particles.