In recent SANDALS experiments, we showed that simple ionic liquids (ILs) ethylammonium nitrate (EAN) and ethanolammonium nitrate (EtAN) are structurally hetereogeneous, with bulk correlation lengths of 1.1 and 0.86 nm respectively. EPSR modelling suggested that this is a result of ion amphiphilicity; EAN exhibits bicontinuous nanostructure due to Coulombic, H-bonding and solvophobic interactions. EtAN¿s alcohol group interferes with solvophobic association between cation alkyl chains, leading to small ion clusters, rather than an extended network. In this proposal, we will examine how IL nanostructure evolves between these two regimes by studying EAN:EtAN mixtures (1:3, 1:1, 3:1 mol/mol) and compare the structures obtained to that determined for the pure ILs.1 This enables the contribution of solvophobic interactions and cation amphiphilicity towards IL bulk structure to be elucidated.