Theory of scanning tunneling microscopy of adsorbed molecules on metallic surfaces for nearly localized atomic states

We present a new theoretical approach to determine the interaction energy due to the coupling of adsorbed molecules to their environment in scanning tunneling microscopy. In fact, the above coupling energy is estimated by assuming the involved adsorbed molecules as Morse oscillators and their environment (electrodes, leads) as external reservoir.

Download Full-text

METALLIC SURFACES UNDER ELEVATED GAS PRESSURE STUDIED IN SITU BY SCANNING TUNNELING MICROSCOPY: O2, H2/Au(111); CO/Au(110)

Physics at Surfaces and Interfaces ◽

10.1142/9789812704221_0002 ◽

2003 ◽

Cited By ~ 1

Author(s):

FRANCISCO JOSE CADETE SANTOS AIRES ◽

CYRILE DERANLOT ◽

YVETTE JUGNET ◽

LAURENT PICCOLO ◽

JEAN-CLAUDE BERTOLINI

Keyword(s):

Scanning Tunneling Microscopy ◽

Gas Pressure ◽

Scanning Tunneling ◽

Metallic Surfaces ◽

Tunneling Microscopy

Download Full-text

Deuteration of C60 on a highly oriented pyrolytic graphite surface

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320000344 ◽

2019 ◽

Vol 15 (S350) ◽

pp. 458-459

Author(s):

G. Pantazidis ◽

M. Scheffler ◽

F. D. S. Simonsen ◽

A. Cassidy ◽

P. A. Jensen ◽

...

Keyword(s):

Thermal Stability ◽

Interstellar Medium ◽

Scanning Tunneling Microscopy ◽

Pyrolytic Graphite ◽

Graphite Surface ◽

Scanning Tunneling ◽

Highly Oriented Pyrolytic Graphite ◽

Tunneling Microscopy ◽

Adsorbed Molecules ◽

Thermal Stability Of

AbstractReactions on carbonaceous surfaces play an important role in processes such as H2 formation in the interstellar medium. We have investigated the adsorption of C2 molecules on a highly oriented pyrolytic graphite (HOPG) surface and then exposed them to a beam of deuterium atoms in order to investigate the formation of deuterated fullerenes. Scanning tunneling microscopy (STM) was used to probe the adsorbed molecules and their deuteration. Deuteration of C2 films results in increased thermal stability of the film, relative to films of pristine C2, along with an evolution towards higher deuterated species. The STM data provide confirmatory evidence for the formation of deuterated fullerene species.

Download Full-text

A unifying model for non-adiabatic coupling at metallic surfaces beyond the local harmonic approximation: From vibrational relaxation to scanning tunneling microscopy

The Journal of Chemical Physics ◽

10.1063/1.4811150 ◽

2013 ◽

Vol 138 (24) ◽

pp. 244106 ◽

Cited By ~ 12

Author(s):

Jean Christophe Tremblay

Keyword(s):

Scanning Tunneling Microscopy ◽

Vibrational Relaxation ◽

Harmonic Approximation ◽

Scanning Tunneling ◽

Metallic Surfaces ◽

Tunneling Microscopy

Download Full-text

Sub-monolayer film growth of a volatile lanthanide complex on metallic surfaces

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.6.248 ◽

2015 ◽

Vol 6 ◽

pp. 2412-2416

Author(s):

Hironari Isshiki ◽

Jinjie Chen ◽

Kevin Edelmann ◽

Wulf Wulfhekel

Keyword(s):

Scanning Tunneling Microscopy ◽

Film Growth ◽

Lanthanide Complex ◽

Scanning Tunneling Spectroscopy ◽

Molecular Magnets ◽

Scanning Tunneling ◽

Metallic Surfaces ◽

Tunneling Microscopy ◽

Monolayer Film ◽

Monolayer Films

We deposited a volatile lanthanide complex, tris(2,2,6,6-tetramethyl-3,5-heptanedionato)terbium(III), onto metal surfaces of Cu(111), Ag(111) and Au(111) in vacuum and observed well-ordered sub-monolayer films with low temperature (5 K) scanning tunneling microscopy. The films show a distorted three-fold symmetry with a commensurate structure. Scanning tunneling spectroscopy reveals molecular orbitals delocalized on the ligands of the molecule. Our results imply that this complex can be transferred onto the metal substrates without molecular decomposition or contamination of the surface. This new rare-earth-based class of molecules broadens the choice of molecular magnets to study with scanning tunneling microscopy.

Download Full-text

A study on α-RuCl3 crystal structure by scanning tunneling microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100152124 ◽

1989 ◽

Vol 47 ◽

pp. 30-31

Author(s):

H.-J. Cantow ◽

H. Hillebrecht ◽

S. Magonov ◽

H. W. Rotter ◽

G. Thiele

Keyword(s):

Crystal Structure ◽

Density Distribution ◽

Scanning Tunneling Microscopy ◽

Electron Density ◽

Structure Determination ◽

Electron Density Distribution ◽

Scanning Tunneling ◽

Monoclinic Space Group ◽

Tunneling Microscopy ◽

X Ray

From X-ray analysis, the conclusions are drawn from averaged molecular informations. Thus, limitations are caused when analyzing systems whose symmetry is reduced due to interatomic interactions. In contrast, scanning tunneling microscopy (STM) directly images atomic scale surface electron density distribution, with a resolution up to fractions of Angstrom units. The crucial point is the correlation between the electron density distribution and the localization of individual atoms, which is reasonable in many cases. Thus, the use of STM images for crystal structure determination may be permitted. We tried to apply RuCl3 - a layered material with semiconductive properties - for such STM studies. From the X-ray analysis it has been assumed that α-form of this compound crystallizes in the monoclinic space group C2/m (AICI3 type). The chlorine atoms form an almost undistorted cubic closed package while Ru occupies 2/3 of the octahedral holes in every second layer building up a plane hexagon net (graphite net). Idealizing the arrangement of the chlorines a hexagonal symmetry would be expected. X-ray structure determination of isotypic compounds e.g. IrBr3 leads only to averaged positions of the metal atoms as there exist extended stacking faults of the metal layers.

Download Full-text