Ligand Bulk and Nanoparticle Size (image) North Carolina State University Caption This image shows that the bulkier the ligand, the fewer ligands can sit side-by-side -- leading to a smaller nanoparticle. Credit Dr. Joe Tracy, North Carolina State University Usage Restrictions Image credit must be given. 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.