Simulating the sensing properties of silver nanoparticles for identifying molecular structures using modified discrete dipole approximation method  ‎

Siabi- Garjan, Araz

doi:10.47176/ijpr.23.2.51683

Simulating the sensing properties of silver nanoparticles for identifying molecular structures using modified discrete dipole approximation method ‎

Document Type : Original Article

Author

araz siabi- Garjan

Department of Engineering Sciences, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin, Iran

https://doi.org/10.47176/ijpr.23.2.51683

Abstract

By making a modification to the usual discrete dipole approximation (DDA) method, the effect of different molecules on the plasmonic properties of silver nanoparticles was investigated. Several calculations were performed for molecules with different structures, sizes and concentrations. The obtained results indicated that considering that the modified DDA method is very sensitive to the geometrical details and the type of atoms of the guest molecule, the smallest change in the dimensions and also the type of atoms of the guest molecule leads to a change in the peak wavelength of the absorption spectrum of silver nanoparticle. These changes are unique for different molecules with good accuracy.

Keywords

discrete dipole approximation

molecular polarizability

sensing properties of silver nanoparticles

Subjects

Optics and Photonics

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