Related Experiment Video
Updated: Jul 9, 2026
13:58
Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
Published on: September 28, 2016
Atomistic Simulations of Fe(CO)5 Fragmentation Dynamics on a Substrate
Hlib Lyshchuk1,2, Alexey V Verkhovtsev3, Juraj Fedor1
1J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
Summary
Electron beam irradiation causes iron pentacarbonyl fragmentation, influencing nanofabrication. Fragmentation dynamics are similar across substrates but affected by binding strength and substrate structure.
Area of Science:
- Surface science
- Computational chemistry
- Materials science
Background:
- Electron-induced dissociation of organometallic molecules is crucial for focused electron beam nanofabrication.
- Molecular fragmentation impacts the elemental composition and metal content of nanodeposits.
Purpose of the Study:
- To investigate the fragmentation dynamics of iron pentacarbonyl (Fe-(CO)5) upon electron irradiation.
- To explore the influence of different substrates on Fe-(CO)5 fragmentation.
Main Methods:
- Irradiation-driven molecular dynamics (IDMD) simulations were employed.
- Simulations included covalent bond breaking and explicit substrate dynamics.
- Fe-(CO)5 was studied on crystalline Au(111), Au(100), polycrystalline gold, and amorphous carbon.
Main Results:
- Fragmentation dynamics of Fe-(CO)5 were found to be similar across various substrates.
- Substrate binding strength and structural irregularity influenced Fe-(CO)5 orientation and fragmentation.
- The study simulated covalent bond breaking and substrate dynamics.
Conclusions:
- The findings provide insights into nanostructure formation via focused electron beams.
- Results aid in interpreting surface science experiments involving electron beam irradiation of molecular systems.
More Related Videos
Related Concept Videos
01:12Fermi Level Dynamics
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
01:08Atomic Force Microscopy
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
01:20Mass Spectrometry: Molecular Fragmentation Overview
The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...