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A flexible nudged elastic band program for optimization of minimum energy pathways using ab initio electronic
Dominic R Alfonso1, Kenneth D Jordan
1Department of Chemistry and Center for Molecular and Materials Simulations, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
Journal of Computational Chemistry
|April 30, 2003
Summary
A new driver program optimizes reaction pathways using the nudged elastic band method. This computational chemistry tool determines minimum energy paths from energies and gradients, aiding chemical reaction studies.
Area of Science:
- Computational Chemistry
- Chemical Physics
- Materials Science
Background:
- Determining reaction pathways is crucial for understanding chemical transformations.
- Traditional methods can be computationally intensive.
Purpose of the Study:
- To describe a driver program for nudged elastic band (NEB) optimizations.
- To enable the calculation of minimum energy reaction pathways (MEPs).
Main Methods:
- Utilized a driver program for NEB optimizations.
- Interfaced the program with GAUSSIAN 98 for energy and gradient calculations.
- Applied the method to isomerization reactions and surface desorption models.
Main Results:
- Successfully implemented NEB optimizations for MEP determination.
- Calculated MEPs using only energy and gradient information.
- Demonstrated applications in isomerization and H(2) desorption from Si(100).
Conclusions:
- The developed driver program provides an efficient method for MEP calculations.
- The approach is versatile, applicable to various chemical systems.
- Facilitates the study of reaction mechanisms in chemistry and materials science.