In a recently published note we presented the first experimental evidence (obtained using the LoQ instrument at ISIS) for nanoscale segregation of short (< C4) alkyl chain ionic liquids (ILs) using propylammonium nitrate and ethylammonium nitrate (EAN). We have since completed neutron diffraction experiments on SANDALS using EAN and ethanolammonium nitrate (EtAN), and modelling revealed a sponge like morphology in both liquids. This structure is more pronounced in EAN, as the ethoxy group of EtAN disrupts solvophobic interactions between cation alkyl groups. In this study, we will examine the effect of variation in the anion species on protic ionic liquid nanostructure using ethylammonium formate (EAF) and ethylammonium hydrogen sulphate (EAHSO4); changing the anion allows solvophobic interactions and the hydrogen bond network strength to be varied.