Scanning Tunneling Microscopy Images of Alkane Derivatives on Graphite: Role of Electronic Effects

Solvent Effects on the Self-Assembly of 1-Bromoeicosane on Graphite. Part I. Scanning Tunneling Microscopy

Self-assembled monolayers of 1-bromoeicosane (BrC20H41) have been investigated at the vacuum-graphite and liquid-graphite interfaces using scanning tunneling microscopy (STM) (Part I) and theory (Part II). Under ultrahigh vacuum conditions at 80 K, STM images show 1-bromoeicosane in a lamellar assembly structure where individual molecules are predominantly arranged with their bromine groups poi...

First-principles calculation of highly asymmetric structure in scanning-tunneling-microscopy images of graphite.

Using a first-principles calculation, we have computed the charge density for states near EF that is related to the current density observable in scanning-tunneling-microscopy experiments for surfaces of hexagonal, rhombohedral, and a model stage-l intercalated graphite. In hexagonal and rhombohedral graphite, the tunneling current is predicted to be considerably smaller at surface atomic sites...

Scanning tunneling spectroscopy of graphene on graphite.

We report low temperature high magnetic field scanning tunneling microscopy and spectroscopy of graphene flakes on graphite that exhibit the structural and electronic properties of graphene decoupled from the substrate. Pronounced peaks in the tunneling spectra develop with increasing field revealing a Landau level sequence that provides a direct way to identify graphene and to determine the de...

Ion irradiation effects on graphite with scanning tunneling microscope

Comparison of electronic and mechanical contrast in scanning tunneling microscopy images of semiconductor heterojunctions

The use of cross-sectional scanning tunneling microscopy (STM) to study strain in semiconductor heterostructures is discussed. In particular, intermixing between constituent heterostructure layers leads to internal strains in the heterostructure, and these strained regions are evident by displacement of the cleavage surface formed in the STM study. A theoretical analysis is made of the magnitud...