Interface Feedback Effect in Molecular Tunnel Junctions.

ABSTRACT: Despite numerous prior studies on molecular tunnel junctions, many important questions remain about the nature of metal-molecule contacts. Using the conducting probe atomic force microscope (CP-AFM) platform, we report here an investigation of electrical contact effects in junctions based on oligophenylene and alkyl dithiols (OPDn, n = 1, 2, 3 and CnDT, n = 8, 9, 10) linked via thiol anchoring groups to dissimilar Ag, Au, and Pt metal electrodes. Our data reveal a peculiar effect: the two metal-molecule interfaces "talk" to each other, i.e., the choice of metal for the tip (t) electrode substantially changes the metal-HOMO electronic coupling Γ associated with the substrate (s) electrode, and vice versa. The metal-HOMO couplings Γ_t and Γ_s<

SUBMITTER: Feng Y 

PROVIDER: S-EPMC11938015 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature