1 Introduction The self-assembly of short peptides can be used to form useful materials, including gels for cell culture and tissue engineering, optoelectronics, drug delivery, pressure-sensitive materials, and sensors.[1-3] A number of these materials are now commercialized.[4, 5] A well-known strategy for forming peptide-based materials involves the double layers of β-strands, in which repeats of amino acids with a high β-strand forming potential are used, usually by alternating polar and...