Figure 2. STM images and DFT calculation results for the L-type valinomycin monomer and its hydrate prepared using the “two-step dosing” method.
(a, b) Typical STM images of an individual L-type valinomycin monomer (ML) and its hydrate (ML') adsorbed onto the Cu(111) surface at 78 K. Both of the STM image sizes are 3 nm × 3 nm. Both of the STM images were collected at −2 V and 0.03 nA. (c) Calculated adsorption configuration of ML' on the Cu(111) surface. (d, e) Calculated electron density of ML and ML'.