| Abstract
| - Cationic gemini surfactants complexed with anionic oligoglycine-aspartate (called gemini peptides hereafter) weresynthesized, and their aggregation behaviors were studied. The effects of the hydrophobic chain length (C10−C22)and the length of the oligoglycine (0−4) were investigated, and it was clearly shown by critical micellar concentration,Krafft temperature, and isothermal surface pressure measurements that the hydrophobic effect and interpeptidic interactioninfluence the aggregation behavior in a cooperative manner. Below their Krafft temperatures, some of them formedboth hydro- and organogels with three-dimensional networks and the Fourier transform infrared measurements showthe presence of interpeptidic hydrogen bonds.
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