Water was found to tune the self-assembled nanostructures of a cationic amphiphile in organic solvents from nanofibers to helical tapes, helical tubes and chiral nanotwists with various pitch lengths depending on water content. Inversion of CD spectra was observed in the water-triggered polar and non-polar solvent gels.

A chiral logic circuit is proposed based on the multiple chiroptical responsiveness of a supramolecular gel material. The gel is fabricated by mixing a chiral gelator and a spiropyran derivative. Chiral responsiveness including the chiral switch and the logic gate is realized through the combined chirality transfer, photochromism, and acidichromism of the system.