C₆₀ Adsorbed on Platinum Surface: A Good Mediator of Metal Wave Function

Abstract

A combined spectroscopic and theoretical study has been performed to clarify the local electronic properties induced at the C 60 -Pt(111) interface. The C 60 molecules are regularly bound to the Pt(111) substrate via covalent bond, forming hybridized states just below the Fermi level (E F ). Such a metallic feature is originated by strong Pt 5d-C 60 π couplings and is extended to the entire molecule, indicating that the adsorbed C 60 molecule serves as an excellent mediator of metal wave function. Our findings correspond well to an extremely high conductivity in C 60 bridged by a pair of Pt electrodes and will provide a useful guide for fabricating moleculebased devices.

C60on the Pt(111) surface: Structural tuning of electronic properties

“…Furthermore, the strong Pt-C 60 interactions turn the C 60 monolayer into a metal (states appear just below the Fermi level); also our simulated PDOS features using our reconstructed model fit the experimental spectroscopic data (ultraviolet photoemission spectroscopy and metastable atom electron spectroscopy data in Ref. 15) better than with the unreconstructed model adopted in that study.…”

“…15 These properties can lead to an extremely high conductivity of C 60 contacts with Pt electrodes. 16 Although the electronic and transport properties reported for C 60 /Pt(111) are exceptional and the electronic properties of the two structural phases can be anticipated to be different, there appear to have been no reports of the electronic properties for C 60 in either of the two possible single-phase structures on Pt(111).…”

Survey of structural and electronic properties of C60 on close-packed metal surfaces

“…Also, the simulated PDOS features using the reconstructed model better fit the experimental spectroscopic data (ultraviolet photoemission spectroscopy and metastable atom electron spectroscopy data in Ref. [79]) than with the unreconstructed model adopted in that study. For the LUMOs of C 60 , the effects of the Pt-C 60 interactions on the PDOS are relatively smaller than for other orbitals shown in the PDOS plots.…”

Local electronic structure at organic–metal interface studied by UPS, MAES, and first-principles calculation

“…Furthermore, a wave function exposed outside the surface gives more effective overlap than that localized on the surface, yielding a stronger band in the spectrum. This unique feature enables us to probe the spatial electron distribution of the surface, and therefore has been applied to directly detect gap states near E F (e.g., CIGSs for benzene on Pd(1 1 0) [11] and Pt(1 1 1) [12], dichloroethane on Pt(1 1 1) [13], alkanethiols on Pt(1 1 1) [14,15], benzenethiol and benzeneselenol on Pt(1 1 1) and Au(1 1 1) [16,17], C 60 on Pt(1 1 1) [18], thiophene derivatives on Pt(1 1 1) [19] and CBGSs for bathocuproine on K-precovered Au [20], and K-doped dibenzopentacene (DBP) [21]) and to trace the electronic response of the final hole produced at the topmost condensed layer [12,[22][23][24].…”

“…After a brief description of experimental and computational methods, we address two types of CIGSs for C n H 2n+1 SH on Pt(1 1 1) [14,15] in Section 4.1 and C 60 on Pt(1 1 1) [18] in Section 4.2. In Section 4.3, we describe the CBGSs that emerge in a K-doped DBP thin film [21].…”