Polysaccharides such as alginate or chitosan have gained increasing attention for applications as soft biomaterials. In particular, alginate-Ca
2+ hydrogel has been applied to food chemistry and as a tissue engineering scaffold. In this study, we prepared an alginate nanofiber without Ca
2+ ions that utilizes self-assembling β-sheet peptides as the cross-linker for the hydrogel. We designed this cross-linker from a sequence of hydrophilic and hydrophobic amino acids, such as (KLVFF)
4, and immobilized the self-assembled β-sheet peptides to the -COOH group of the alginate to form cross-links. We then investigated the molecular conformation of the self-assembled β-sheet peptides in solution by circular dichroism and infrared spectroscopy.
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