Multiple plasmon resonances in small-sized citrate reduced gold nanoparticles

Show simple item record Ngumbi, Paul K. Mugo, Simon W. Ngaruiya, James M. King’ondu, Cecil K. 2019-05-29T09:16:25Z 2019-05-29T09:16:25Z 2019-05-15
dc.identifier.citation Materials Chemistry and Physics, Volume 233, 15 May 2019, Pages 263-266 en_US
dc.identifier.issn 0254-0584
dc.description en_US
dc.description.abstract Metallic nanoparticles exhibit localized surface plasmon resonances resulting from the coherent oscillation of free electrons in response to electric field from incident electromagnetic radiation. In this work, the dependence of peak surface plasmon resonance of gold nanoparticles on the particle size using UV–Vis spectra is shown. Small-sized gold nanoparticles (10–15 nm) were prepared through citrate reduction method. From theoretical modelling based on their resonance peaks and full wave at half maximum, the gold nanoparticles were found to have a narrow size distribution of ∼12 nm optimized over 1.0–1.10 mL of the citrate. A comparison of the experimental data and data from multiple scattering theory revealed that the plasmon resonances were centered at wavelengths between 520 and 518 nm for all samples under citrate volume range from 0.85 to 1.15 mL. Further analysis indicated that, small sized AuNPs exhibited multiple resonances, which could be attributed to the radiative interband recombination between the sp- and d-bands. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Small-sized gold nanoparticles en_US
dc.subject Citrate reduction en_US
dc.subject UV–Vis spectroscopy en_US
dc.subject Full wave at half maximum (FWHM) en_US
dc.subject Multiple plasmon resonances en_US
dc.title Multiple plasmon resonances in small-sized citrate reduced gold nanoparticles en_US
dc.type Article en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search Repository


My Account