Size- Dependent Optical Properties Of Nanoparticles

Davlatov Utkir Tagaevich; Nafasova Gulnoza Baxtiyorovna; Ashurova Muxlisa Akbarali qizi

Authors

Davlatov Utkir Tagaevich Associate Professor of the Department of Physics, Candidate of Physical and Mathematical Sciences, Gulistan State University, Uzbekistan
Nafasova Gulnoza Baxtiyorovna Teacher at of the Department of Physics,Gulistan State University, Uzbekistan
Ashurova Muxlisa Akbarali qizi Master’s student of the Department of Physics, Uzbekistan

Keywords:

Nanoparticles, Size-dependent optical properties, Surface plasmon resonance, Quantum dots

Abstract

The rapid development of nanotechnology requires a thorough understanding of the size-dependent optical properties of nanoparticles. In this study, the synthesis, size control, and optical characterization of gold (Au), silver (Ag) nanoparticles, and CdSe quantum dots were investigated. The results showed that the surface plasmon resonance (SPR) of Au nanoparticles shifted to longer wavelengths with increasing particle size, while Ag nanoparticles exhibited sharper and higher amplitude SPR peaks.These findings highlight the potential applications of nanoparticles in biosensing, bioimaging, photonics, energy conversion, and photothermal therapy.