Open AccessEffect of Experimental Parameters on the Fabrication of Gold Nanoparticles via Laser Ablation
Author(s) -
Hisham Imam,
Khaled A. Elsayed,
M.A. Ahmed,
Rania Ramdan
Publication year - 2012
Publication title -
optics and photonics journal
Language(s) - English
Resource type - Journals
eISSN - 2160-889X
pISSN - 2160-8881
DOI - 10.4236/opj.2012.22011
Subject(s) - materials science , laser , absorbance , ablation , wavelength , laser ablation , nanoparticle , particle size , colloidal gold , optics , laser ablation synthesis in solution , fabrication , optoelectronics , analytical chemistry (journal) , nanotechnology , x ray laser , laser power scaling , chemical engineering , chemistry , chromatography , medicine , physics , alternative medicine , pathology , aerospace engineering , engineering
In this study we report the effect of laser parameters such as laser energy, laser wavelength as well as focusing condition of laser beam on the size and morphology of the gold nanoparticles (GNPs) prepared in deionised water by pulsed laser ablation. The optimum conditions at which gold nanoparticles obtained with controllable average size have been reported as these parameters affected on the size, distribution and absorbance spectrum. Effect of energy was studied. The laser energy was divided into three regions (low, middle and high). A noteworthy change was observed at each region, as the average size changed from 5.9 nm at low energy to 14.4 nm at high energy and the gold nanoparticles reached a critical size of 8 nm at 100 mJ. The Effect of the wavelength on the particle size was examined at 1064 nm, 532 nm. It was found that, the optimum ablation laser wavelength was 1064 nm. Finally, significant results obtained when the effect of focusing conditions studied