Morphologies, structures, and interfacial electronic structure of perylene on Au(111)

Abstract

Various coverages of perylene thin films on Au(111) were investigated using scanning tunneling microscopy (STM) and ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. A Schottky junction formed between Au(111) and perylene consisted of a large 0.65 eV interface dipole and a hole barrier height of 0.85 eV. A wetting layer of approximately 4 Å thickness was initially formed followed by island formation, consistent with Stranski–Krastanov growth. Room temperature STM investigations of nominal one monolayer perylene films revealed symmetry equivalent domains and two different stable commensurate lattice structures. Perylene film growth mode, film structure and the energy level diagram are discussed.

Profiles of Work Function Shifts and Collective Charge Transfer in Submonolayer Metal–Organic Films

“…F4TCNQ is a strong acceptor with Δ > 0 and CT to the molecule. The profile25 of perylene/Au with about 10% larger A 0 is quite similar, aside from the sign, Δ < 0. The calculated profiles agree quantitatively with these data for ρ (0) ∼ 0.50 in Table 2, or 50% CT for an isolated adsorbed molecule, and considerably smaller ρ (1) ∼ 0.10 for a ML.…”

“…Published work function profiles23–32 of sub‐ML films are cited and listed in Table 2 . The data extend beyond θ = 1.…”

Construction of an Internally B3N3‐Doped Nanographene Molecule

“…[13] Them easured electronic height of the molecule (1.8 ; Figure 1c)iscomparable to previous reports for other two-dimensional polyaromatic hydrocarbon molecules on aA u(111) surface. [14] This suggests that BN-HBC is flatlying and two-dimensional. Larger scale STM images reveal that upon adsorption, the BN-HBC molecules are preferentially adsorbed at the elbows of the herringbone reconstruction (as in Figure 1b), with aminority also adsorbed on the fcc regions of the surface.I ti sapparent that the symmetries of the molecule and the substrate align, in am anner similar to unsubstituted HBC on Au(111).…”

“…1c), is comparable with previous reports for other two-dimensional polyaromatic hydrocarbon molecules on a Au(111) surface. [14] This suggests that BN-HBC is flat-lying and two-dimensional. Larger scale STM images reveal that upon adsorption, the BN-HBC molecules are preferentially adsorbed at the elbows of the herringbone reconstruction (as is the case in Fig.…”

Supramolecular organization of bi- and terthiophene disubstituted diketopyrrolopyrrole, donor–acceptor–donor semiconducting derivatives

“…Scanning tunneling microscopy (STM) is very well suited for the investigations of the self-assembly phenomena, provided that monolayers of the studied compounds can be obtained on appropriate substrates such as gold single crystals or HOPG, assuring images at molecular resolution, for example [15][16][17][18][19][20][21].…”