Fig. 2: Conductance modulation mechanism of RuXLPH SAM.
From: Molecular HDD logic for encrypted massive data storage
a Ru 3d5/2 and (b) N 1 s XPS spectra of the RuXLPH SAM in OFF and ON states. c HOMO, LUMO and ESP distribution of the RuXLPH molecule with Ru2+ and Ru3+ cations. The brown, white, blue, green, red and light purple spheres represent carbon, hydrogen, nitrogen, oxygen, phosphor and ruthenium atoms, respectively. d Evolution of the PFM phase signals of the RuXLPH SAM upon being subject to bias voltage of 0 V, 1.0 V, 2.0 V and 3.0 V. e A phenomenological model describing the evolution of redox states of the Ru cation as well as the local drifting and accumulation of chloride anions in the RuXLPH SAM during biased voltage sweepings.
