scholarly journals On-Surface Synthesis of Boroxine-Based Molecules

Chemistry ◽  
2021 ◽  
Vol 3 (4) ◽  
pp. 1401-1410
Author(s):  
Elia Turco ◽  
Matus Stredansky ◽  
Roberto Costantini ◽  
Javier A. Martinez ◽  
Martina Dell’Angela ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Dft Calculations ◽  
Convenient Method ◽  
Electronic Transitions ◽  
Scanning Tunneling ◽  
Condensation Process ◽  
Tunneling Microscopy ◽  
X Ray ◽  
Molecular Precursor ◽  
Synthesis Protocol

The on-surface synthesis of boroxine-containing molecules can be a convenient method of introducing specific functionalities. Here, we show the validity of a previously described synthesis protocol on the Au (111) surface by applying it to a different molecular precursor. We study in detail the assembly of the precursor, highlighting possible intermediate stages of the condensation process. We combine scanning tunneling microscopy and X-ray spectroscopies to fully characterize both the morphology and the electronic properties of the system. DFT calculations are presented to assign the main electronic transitions originating the B K-edge absorption spectrum. The study paves the way to a facile strategy for functionalizing a surface with molecules of tailored sizes and compositions.

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

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.

scholarly journals Interface morphology of a Cr(001)/Fe(001) superlattice determined by scanning tunneling microscopy and x-ray diffraction: A comparison

2001 ◽  
Vol 89 (1) ◽  
pp. 181-187 ◽  
Author(s):  
C. M. Schmidt ◽  
D. E. Bürgler ◽  
D. M. Schaller ◽  
F. Meisinger ◽  
H.-J. Güntherodt ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Scanning Tunneling ◽  
Interface Morphology ◽  
X Ray Diffraction ◽  
Tunneling Microscopy ◽  
X Ray

scholarly journals Structural determination of the Si(111) √3×√3-Bi surface by x-ray standing waves and scanning tunneling microscopy

1994 ◽  
Vol 50 (16) ◽  
pp. 12246-12249 ◽  
Author(s):  
J. C. Woicik ◽  
G. E. Franklin ◽  
Chien Liu ◽  
R. E. Martinez ◽  
I.-S. Hwong ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Standing Waves ◽  
Scanning Tunneling ◽  
Structural Determination ◽  
Tunneling Microscopy ◽  
X Ray

scholarly journals On-surface synthesis of singly and doubly porphyrin-capped graphene nanoribbon segments

2021 ◽  
Vol 12 (1) ◽  
pp. 247-252
Author(s):  
Luis M. Mateo ◽  
Qiang Sun ◽  
Kristjan Eimre ◽  
Carlo A. Pignedoli ◽  
Tomas Torres ◽  
...  
Keyword(s):  
High Resolution ◽  
Dft Calculations ◽  
Scanning Tunneling Microscopy ◽  
Electronic Properties ◽  
Graphene Nanoribbon ◽  
Scanning Tunneling ◽  
Tunneling Microscopy

Singly and doubly porphyrin-capped graphene nanoribbon segments are reported and their electronic properties are studied by high-resolution scanning tunneling microscopy and spectroscopy, and DFT calculations.

Hard X-ray beam damage study of monolayer Ni islands using SX-STM

2015 ◽  
Vol 1754 ◽  
pp. 135-140 ◽  
Author(s):  
Nozomi Shirato ◽  
Marvin Cummings ◽  
Heath Kersell ◽  
Yang Li ◽  
Dean Miller ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Scanning Tunneling ◽  
X Rays ◽  
Tunneling Microscopy ◽  
X Ray ◽  
Induced Changes ◽  
Metal Islands ◽  
Beam Damage ◽  
Damage Study

ABSTRACTX-ray beam-induced damage in nanoscale metal islands was investigated. Monolayer-high Ni islands were prepared on a Cu(111) substrate. High brilliance X-rays with photon energies between 8.45 and 8.85 keV illuminated the sample for about 11 hours. In order to track changes in the morphology of the islands, the synchrotron X-ray scanning tunneling microscopy (SX-STM) technique was utilized. The result shows that X-ray illumination onto Ni islands does not induce noticeable damage. The study demonstrates that local beam-induced changes can be studied using SX-STM.

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