Figure 2.

Initial configuration of a glycine and a gold nanoparticle with a diameter of 4.0 nm in a cubic box of a length 7.0 nm. Au atom: yellow, C atom: green, N atom: blue, O atom: red, and H atom: white. The gold nanoparticle and the glycine molecules are depicted in the VDW representation, and the water molecules are depicted in the CPK model. This configuration was generated using the VMD package.⁵⁰