Fabrication process (IMAGE) City University of Hong Kong Caption Figure A shows the fabrication process of ultrathin film from small intestine submucosa. Figure B is a scanning electron microscope image showing the thickness comparison between the untreated (78.5 μm) and peeled-off small intestine submucosa (8.5 μm). Figure C shows the thickness of ultrathin film by repeated peeling (about 100nm). Figure D shows ultrathin film on a silicon substrate. Credit Z. Zhang, S. Liu, et al. / DOI number: 10.1002/adma.202200864 Usage Restrictions Image must be used with appropriate caption and credit. 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.