Figure 2
From: Antimicrobial mechanisms due to hyperpolarisation induced by nanoporous Au

Electrostatic potentials of a part of peptidoglycan (glycan chain) close to the cell membrane, interacting with (a) no Au, (b) flat Au (FG), (c) nanoporous Au (NPG) (+5% strain) and (d) NPG (−5% strain), where the isosurface is plotted as the negative value of −20 kT. Only slight negative hyperpolarisation is observed for peptidoglycan interacting with no Au, FG or NPG (+5% strain). However, large negative hyperpolarisation is found for peptidoglycan interacting with NPG (−5% strain).