The invention is directed to small molecules that self-assemble hierarchically to form NPs termed SHS (due to their architectural features). These SHS are composed by precise supramolecules known as Supramolecular G-Quadruplexes (SGQs) which are formed when amphiphilic guanosine (G) derivatives that self-assemble in presence of salt by non-covalent interactions. The resulting SGQs are made of amphiphilic guanosine (G) subunits (with precisely eight subunits at neutral pH (pH>5.7) or sixteen subunits at acidic pH (pH<5.7)). The SGQs are responsive entities that further self-assemble upon an external stimulus, such as an increase in temperature or a change in pH, leading to the formation of the aforementioned SHS.
