Pic 3 (IMAGE) National Research Council of Science & Technology Caption Actual fabricated 4-inch WS₂-Graphene heterostructure sample photo, and atomic layer cross-sectional TEM image Credit Korea Institute of Machinery and Materials (KIMM) Usage Restrictions The sources of photos and research results from KIMM must be specified. License Original 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.