Abstract
In this study, silver and gold nanospheres were produced in aqueous solution at room temperature. The morphological and optical properties of the nanospheres were studied using scanning electron microscopy and UV–visible spectroscopy. COMSOL Multiphysics software was used to investigate the optical properties, biological properties, and equivalent circuit of chemically synthesized silver and gold nanospheres. Both silver and gold nanospheres were characterized for their surface morphology and optical properties. The optical properties of nanospheres were studied by dispersing them in water and free space as well. The field distribution inside the nanospheres suggested their possible use in anticancer applications. The nanoelements of the equivalent circuits, in the visible domain, were also deduced by using plasmonic and nonplasmonic spheres. Both gold and silver nanospheres have been found to be useful in the design of various components of equivalent electrical circuits. Basic circuit components, including nano-inductors, nano-capacitors, and nano-resistors, have been measured based on optical properties of nanospheres.
Highlights
A bulk material has physical properties that do not depend on shape and size of the material
In the finite element method (FEM), the numerical modeling steps were implemented in the following sequence: the problem was discretized into a finite number of elements, the governing equations for all elements were defined, the elements were assembled in the solution region, and the system of all equations was solved
The maximum value of the enhanced electric field was obtained at the interface between free space and the nanosphere. These findings suggest that one may apply light with different wavelengths to fix the temperature of nanospheres
Summary
A bulk material has physical properties that do not depend on shape and size of the material. Ag-NPs show high electrical conductivity and low optical frequency loss during the propagation of surface plasmons. These particles show better light absorption in the visible and far-IR regions of light.. The surface plasmon resonance of silver and gold nanoparticles enhances the electric field strength near the nanoparticles as compared to the field of incident light.. The dissipative response is observed in terms of Ohmic losses for the measurement of resistance of the circuit.20 These measurements help us understand the plasmonic behavior of the nanoparticles and manipulate the optical information obtained during light–particle interaction.. The experimental results were used in COMSOL Multiphysics software for understanding the optical properties, biological properties, and equivalent electric circuit of silver and gold nanospheres
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