*2.1. Materials*

The Gemini 12-2-12 surfactant (from now on, G12-2-12), was synthetized in our laboratory [13] following a slightly modified method employed by Zana et al. [14]. The success of the synthesis was confirmed by nuclear magnetic resonance (NMR) measurements. After synthesis and purification, the surfactant was kept under vacuum over dried silica to minimize water absorption before use. Milli-Q water (resistance >18.2 MΩ·cm) was used for the preparation of all solutions used in this work.
