ecoli with and without particles
Optical microscope images of E.coli (left) and E. coli incubated with a ligand-modified gold nanocrystal antibiotic.
Peptide-modified gold nanoparticles inside fibroblast cells.

crystal of gold nanocrystals

Electron microscope image of a crystal of 2.0 nm diameter gold nanocrystals.

sdc1721 model

Model of a gold nanocrystal HIV entry inhibitor.