In this image, fluorescence is used to look at the self-assembly of amino acids. Self-assembly of nanostructures has been a recent interest in the nanoscience field. Self-assembly is a process where smaller subunits (like amino acids, molecules, and atoms) spontaneously organize into larger structures (like peptides), without human intervention.

A. Lampel, S.A. McPhee, S. Kassem, D. Sementa, T. Massarano, J. M. Aramini, Y. He, and R. V. Ulijn, Melanin-Inspired Chromophoric Microparticles Composed of Polymeric Peptide Pigments, Angew Chem Int Ed Engl, 2021, 60, 7564-7569.