Figure 3.

Flicker Noise Analysis

The conductance data used for flicker noise analysis were also collected from the STM instrument. The gold tip moved downward and forms Au-molecule-Au junction, the junction was held for 150 ms at the position where the molecule junction is likely to be formed, which was controlled by the program automatically. Two-dimensional histogram of normalized flicker noise power versus average conductance for (A) FDH, (B) FDH-NAD⁺, and (C) FDH-NADP⁺. And the schematic diagram of the electron transfer process in FDH, FDH-NAD⁺, FDH-NADP⁺ were listed under the two-dimensional histogram accordingly.

See also Figure S5.