Natural non-proteinogenic amino acid piezoelectric assembly for energy harvesting.

Amino acid-based piezoelectric assemblies have been significantly developed. However, the piezoelectricity of natural non-proteinogenic amino acid assemblies remains rarely reported. Herein, we present a novel piezoelectric assembly of natural non-proteinogenic amino acid 5-hydroxytryptophan for energy harvesting. This work expands the family of biomolecule-based piezoelectric supramolecular materials.