Chapter 19
Perspectives
Abstract The dynamic VLEED, in junction with STM and PES, has enabled the
hitherto comprehensive insight into the nature and dynamics of four-stage CuO 2
and subsequent Cu 3 O 2 bond forming on the Cu(001) surface and its consequences
on the behavior of atoms and valence electrons in terms of the tetrahedral bond
geometry, four valence DOS features and the 3D SPB evolution. Derived quantititive information also includes the 2D Brillouin zones, effective masses of electrons
at the boundaries, energy band dispersion, muffin-tin potential, work function and
forces driving the missing rows, lattice reconstruction and relaxation, etc. VLEED
forms such a promising means that reconciles crystallography, surface morphology and electron enenrgy spectroscopy overing the valence band and above, though
sophisticated logic thinking and patience are necessary. Progeress proved that the
impact of Coordination Bonding and Electronic Dynamics is immesely profound
and essential to the understanding of the surface processes.
Highlights
• VLEED reconciles capabilities of electronic spectroscopy, crystallography and
morphology.
• Orbital hybridization and surface bond contraction are key drivers for chemisorption.
• It is forbidden that one O forms more than one bond with any specific atom.
• The two bonds forms one after the other followed by sp
3 -orbital hybridization.
The dynamic VLEED, in junction with STM and PES, has enabled the hitherto
comprehensive insight into the nature and dynamics of oxide bond forming on the
Cu (001) surface and its consequences on the behavior of atoms and valence electrons from the perspective of the bond geometry, valence DOS and the 3D SPB.
Strategies of extracting information from the combination of STM, PES and the
dynamic VLEED are proven essential, effective and correct. Major progress made
is summarized as follows:
(1) VLEED is such a unique technique that it collects quantitative and nondestructive information from a single atomic layer and covers the valence band of a
© The Editor(s) (if applicable) and The Author(s), under exclusive license
to Springer Nature Singapore Pte Ltd. 2020
C. Q. Sun, Electron and Phonon Spectrometrics,
https://doi.org/10.1007/978-981-15-3176-7_19
361
Perspectives
Abstract The dynamic VLEED, in junction with STM and PES, has enabled the
hitherto comprehensive insight into the nature and dynamics of four-stage CuO 2
and subsequent Cu 3 O 2 bond forming on the Cu(001) surface and its consequences
on the behavior of atoms and valence electrons in terms of the tetrahedral bond
geometry, four valence DOS features and the 3D SPB evolution. Derived quantititive information also includes the 2D Brillouin zones, effective masses of electrons
at the boundaries, energy band dispersion, muffin-tin potential, work function and
forces driving the missing rows, lattice reconstruction and relaxation, etc. VLEED
forms such a promising means that reconciles crystallography, surface morphology and electron enenrgy spectroscopy overing the valence band and above, though
sophisticated logic thinking and patience are necessary. Progeress proved that the
impact of Coordination Bonding and Electronic Dynamics is immesely profound
and essential to the understanding of the surface processes.
Highlights
• VLEED reconciles capabilities of electronic spectroscopy, crystallography and
morphology.
• Orbital hybridization and surface bond contraction are key drivers for chemisorption.
• It is forbidden that one O forms more than one bond with any specific atom.
• The two bonds forms one after the other followed by sp
3 -orbital hybridization.
The dynamic VLEED, in junction with STM and PES, has enabled the hitherto
comprehensive insight into the nature and dynamics of oxide bond forming on the
Cu (001) surface and its consequences on the behavior of atoms and valence electrons from the perspective of the bond geometry, valence DOS and the 3D SPB.
Strategies of extracting information from the combination of STM, PES and the
dynamic VLEED are proven essential, effective and correct. Major progress made
is summarized as follows:
(1) VLEED is such a unique technique that it collects quantitative and nondestructive information from a single atomic layer and covers the valence band of a
© The Editor(s) (if applicable) and The Author(s), under exclusive license
to Springer Nature Singapore Pte Ltd. 2020
C. Q. Sun, Electron and Phonon Spectrometrics,
https://doi.org/10.1007/978-981-15-3176-7_19
361