Abstract: A spin-selective conduction structure comprises a crystal having a monolayer of metal atoms between two layers of chiral organic molecules. Each metal atom is coupled to two chiral organic molecules, one at each layer, wherein a chirality of organic molecules in one of the two layers is the same as a chirality of organic molecules in another one of the two layers.

Abstract: A piezoelectric transducer is provided herein, comprising a three-dimensional structure made of a plurality of peptides, the peptides being self-assembling and the structure being piezoelectric, wherein at least a portion, or each, of said plurality of peptides comprises peptides of 2 to 10 amino acid residues, provided that the plurality of peptides is not consisted of a plurality of Phe-Phe dipeptides. Further described herein are peptides having an amino acid sequence Hyp-Phe-Phe, Boc-Dip-Dip, (L)Trp-(D)Trp or (D)Trp-(L)Trp, as well as three-dimensional structures comprising such peptides.

Abstract: A thermally stable composition having at least one aromatic cyclic di-peptide is provided having a thermal sustainability of up to 680 Kelvin. The thermally stable compositions can be used in high temperature applications.

Abstract: Self-assembled structures formed of a plurality of cyclic peptides which are in association with metal ions is provided. The cyclic peptides are each of from 2 to 6 amino acid residues, and two or more of the amino acid residues are each independently an aromatic amino acid residue. The self-assembled structures exhibit photoluminescence and can be used or incorporated in light emitting systems.

Abstract: Provided herein are composite structures that include a core fiber and a plurality of peptide-based self-assembled nanostructures attached thereto, wherein the nanostructures may be loaded with a bioactive agent, such that the composite structures may act as slow-release drug-delivery medical device. Also provided is process for producing the composite structures, and uses thereof.