How Charged Gold Nanoparticles Unravel DNA (image) North Carolina State University Share Print E-Mail Caption Positively-charged ligands on the nanoparticles attach to the DNA, but the hydrophobic ligands of the nanoparticles became tangled with each other. As this tangling pulled the nanoparticles into clusters, the nanoparticles pulled the DNA apart. Credit Yaroslava Yingling, North Carolina State University Usage Restrictions Image credit must be given. Share Print E-Mail 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.