The influence of the laser power, laser irradiation time and laser wavelength in the synthesis process were studied. The structure and morphology of nanoparticles were characterized by using UV-vis absorption spectroscopy, transmission electron microscopy (TEM), energydispersive X-ray spectroscopy (EDX), and X-ray diffraction measurements. The preparation procedures, results and discussion were given in this report. | VNU Journal of Science: Mathematics – Physics, Vol. 32, No. 4 (2016) 12-19 Preparation of Metal, Alloy and Semiconductor Nanoparticles Tran Trong Duc*, Ngo Gia Long, Hoang Ha My, Nguyen The Binh Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam Received 20 October 2016 Revised 16 November 2016; Accepted 28 December 2016 Abstract: By using Nd: YAG laser, we have successfully prepared noble metal nanoparticles (Au, Ag), semi-conductor nanoparticles (Si), and metalic alloy nanoparticles (Au/Ag) in different clean liquids (such as pure water, ethanol). Both metal and semi-conductor nanoparticles were synthesized by laser ablation of pure metal or semi-conductor plate in liquids . Au/Ag alloy nanoparticles were prepared by laser induced synthesis from a mixture of colloidal Au and Ag nanoparticles . The influence of the laser power, laser irradiation time and laser wavelength in the synthesis process were studied. The structure and morphology of nanoparticles were characterized by using UV-vis absorption spectroscopy, transmission electron microscopy (TEM), energydispersive X-ray spectroscopy (EDX), and X-ray diffraction measurements. The preparation procedures, results and discussion were given in this report. Keywords: Laser ablation, nanoparticle, laser induced synthesis. 1. Introduction Metal, semiconductor and metallic alloy NPs are very attractive and interesting area of current research because of their diverse applications in biomedical field. Besides many well known applications of noble metal NPs, many applications of nanoscale semiconductor have been recently studied. It is well known that Si is one of the most important materials for electronic devices. Recently, applications for opto elecronic devices have been examined since efficient visible photoluminescence was observed in Silicon nanocrystallites [1]. Apart from electronic or optical devices, semiconductor nanocrystallites are possible materials for biological .
