Plasma-Structural Coloring (IMAGE) Shinshu University Caption (a) Scheme illustrating the “plasma-structural coloring”; (b) The picture of a letter “A” written by a pencil; (c) The picture of the sample after the plasma irradiation for 80 seconds. Credit ADAPTED WITH PERMISSION FROM ACS APPL. MATER. INTERFACES 2023, 15, 3, 4781–4788. COPYRIGHT 2023 AMERICAN CHEMICAL SOCIETY. Usage Restrictions Credit must be given to the creator. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.