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Related Concept Videos

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Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than...
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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Related Experiment Video

Updated: Apr 28, 2026

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
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A charge optimized many-body potential for titanium nitride (TiN).

Y-T Cheng1, T Liang, J A Martinez

  • 1Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|June 7, 2014
PubMed
Summary
This summary is machine-generated.

A new variable charge potential for titanium nitride (TiN) was developed and validated. This potential accurately models TiN properties and is suitable for simulating TiN thin films and their oxidation behavior.

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Area of Science:

  • Materials Science
  • Computational Materials Science
  • Surface Science

Background:

  • Titanium nitride (TiN) is a critical material in various technological applications.
  • Accurate modeling of TiN properties, especially at interfaces and surfaces, is essential for understanding its behavior.
  • Existing potentials may not fully capture the complexities of TiN, particularly its variable charge characteristics.

Purpose of the Study:

  • To develop a new empirical, variable charge potential for titanium nitride (TiN) within the charge-optimized many-body potential framework.
  • To validate the developed potential against experimental data and first-principles calculations for fundamental TiN properties.
  • To utilize the validated potential in molecular dynamics simulations to investigate TiN interfaces and surface chemistry.

Main Methods:

  • Empirical potential development using the charge-optimized many-body potential framework.
  • Parameter fitting to experimental data including enthalpy of formation, lattice parameters, and elastic constants.
  • Validation against first-principles calculations for defect formation and surface energies.
  • Classical molecular dynamics simulations to study Ti(001)/TiN(001) interfaces and oxygen adsorption on TiN(001).

Main Results:

  • A new variable charge potential for TiN was successfully developed.
  • The potential accurately reproduces experimental and first-principles calculated properties of TiN.
  • Simulations revealed insights into the Ti(001)/TiN(001) interface and oxygen adsorption behavior on TiN surfaces.
  • The potential demonstrates suitability for modeling TiN thin films and their oxidation.

Conclusions:

  • The developed variable charge potential is a significant advancement for modeling TiN systems.
  • This potential enables more accurate and efficient simulations of TiN thin films and their interactions with other species.
  • The findings pave the way for further exploration of TiN-based materials and their applications, particularly in oxidation environments.