https://news.ncsu.edu/2012/06/wms-melechko-dna/
Researchers Find Gold Nanoparticles Capable of 'Unzipping' DNA
>New research from North Carolina State University finds that gold nanoparticles with a slight positive charge work collectively to unravel DNA's double helix. This finding has ramifications for gene therapy research and the emerging field of DNA-based electronics. As the nanoparticles cluster together, they pull the strands of DNA apart.