In earlier SANDALS investigations we have shown that protic ionic liquids (PILs) are nanostructured in the bulk, and how dissolved inorganic salts and small molecule solvents influence nanostructure. PIL nanostructure results from attractive solvophobic interactions between amphiphilic cation alkyl chains, and becomes better defined as the cation alkyl chain length is increased. We have recently developed a class of amphiphilic deep eutectic solvents (DES) with ion structures derived from PILs we have studied previously. This work will elucidate the nanostructure of 1:2 mixtures of urea with ethylammonium bromide (EABr), propylammonium bromide (PABr) and butylammonium bromide (BABr) to reveal the effect of cation alkyl chain length on nanostructure in these DES.