Simulating and Analyzing the Electronic Structure of a Spherical Amorphous SiO2 Nanoparticle of Finite Radius

Authors

  • C. P. Dhakal Department of Physics, Florida International University, USA
  • K. B. Rai Department of Physics, Patan Multiple Campus, Tribhuvan University, Nepal

DOI:

https://doi.org/10.3126/jnphyssoc.v9i2.62285

Keywords:

Amorphous silica nanoparticles,, Continuous random network, Orthogonalized, Linear Combination of Atomic Orbital, angling bonds,, Band gap.

Abstract

This study focuses on the electronic structure and properties of amorphous SiO2 nanoparticle with a radius of 18 Å using Density Functional Theory and the Orthogonalized Linear Combination of Atomic Orbital method. Through employing appropriate statistical techniques, three distinct models (I, II, and III) of amorphous SiO2 nanoparticle with an 18 Å radius are generated based on the continuous random network structure incorporating periodic boundaries. The calculated Total Density of States and Partial Density of States reveal insights into the electronic interactions within the nanoparticle. The band gap values are assessed at both less accurate and more accurate potentials such that the band gap increases from 2 eV to 4.2 eV with higher potentials for Model I, where surface atoms has dangling bonds stabilized by hydrogen atoms. Model II, consisting of all surface silicon atoms bonded to four oxygen atoms, exhibits a band gap of 1 eV, increasing to 1.8 eV with higher potentials. Model III, saturated with hydrogen atoms, shows a band gap of 4 eV, decreasing to 3.75 eV at higher potentials. The introduction of the more accurate potential serves to minimize the gap states initially observed with the less accurate potential. The electronic structure calculations provide crucial information for understanding the electronic interactions within the amorphous SiO2 nanoparticle with implications for their applications in various fields such as biomedicine, catalysis, electronics, and nanotechnology.

Downloads

Download data is not yet available.
Abstract
62
PDF
69

Downloads

Published

2023-12-31

How to Cite

Dhakal, C. P., & Rai, K. B. (2023). Simulating and Analyzing the Electronic Structure of a Spherical Amorphous SiO2 Nanoparticle of Finite Radius. Journal of Nepal Physical Society, 9(2), 14–22. https://doi.org/10.3126/jnphyssoc.v9i2.62285

Issue

Section

Articles