Full Quantum Dynamics Study for H Atom Scattering from Graphene.
Lei Shi1, Markus Schröder2, Hans-Dieter Meyer2
1Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay UMR 8214, 91405 Orsay, France.
The Journal of Physical Chemistry. A
|January 14, 2025
Summary
Quantum dynamics simulations reveal discrepancies between classical simulations and experiments for hydrogen atom scattering on graphene. This highlights the crucial role of quantum effects and potential energy surfaces in atom-surface interactions.
Area of Science:
- Surface science
- Quantum chemistry
- Computational physics
Background:
- Understanding hydrogen atom scattering from graphene is crucial for C-H bond formation and energy transfer.
- Previous work utilized reduced-dimensional (15D) and full-dimensionality (75D) quantum dynamics (QD) simulations, comparing QD to classical molecular dynamics (cMD).
Purpose of the Study:
- To refine simulation methods to better mimic experimental conditions for hydrogen-graphene interactions.
- To identify discrepancies between cMD simulations and experimental results.
- To investigate the role of quantum effects and potential energy surfaces in atom-surface collisions.
Main Methods:
- Employed plane wave for hydrogen atoms parallel to the graphene surface, mimicking experimental conditions.
- Utilized advanced techniques including Monte Carlo canonical polyadic decomposition (MCCPD) and multilayer multiconfiguration time-dependent Hartree (ML-MCTDH).
- Developed quantum flux calculations and benchmarked against cMD.
Main Results:
- Identified discrepancies between cMD simulations and experimental data for hydrogen-graphene collisions.
- Attributed discrepancies to the potential energy surface (PES) and quantum mechanical effects.
- Elucidated the role of classical collective normal modes in collision energy transfer.
Conclusions:
- Validated the robustness of the developed simulation methodologies.
- Emphasized the critical importance of incorporating quantum mechanical effects for accurate modeling of hydrogen-graphene interactions.
- Provided insights into energy transfer mechanisms during atom-surface collisions.
Related Concept Videos
02:45The Quantum-Mechanical Model of an Atom
41.9K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
41.9K
02:32The de Broglie Wavelength
25.3K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
25.3K
01:192D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
625
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
625
01:16IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
1.2K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
According to Hooke's law, the vibrational frequency is directly proportional to...
1.2K
02:18The Bohr Model
50.9K
Following the work of Ernest Rutherford and his colleagues in the early twentieth century, the picture of atoms consisting of tiny dense nuclei surrounded by lighter and even tinier electrons continually moving about the nucleus was well established. This picture was called the planetary model since it pictured the atom as a miniature “solar system” with the electrons orbiting the nucleus like planets orbiting the sun. The simplest atom is hydrogen, consisting of a single proton as...
50.9K
00:26Hydrogen Bonds
120.6K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
120.6K