Abstract
Cupper nanoparticles are generated by using Nd:YAG laser nanosecond pulses using the liquid laser ablation technique. Nd:YAG of 6 and 10 nanoseconds pulse length with variable energy in the range are the two systems used (700-760 mJ ).The formation of cupper nanoparticles has been abolished using TEM with identical size distribution It has also been observed that when identical laser parameters are used, the average nanoparticles sizes of 80 and 120 nm for cupper are used.Furthermore, to approximate the temperature distributions for both cupper nanoparticles, the theoretical Mie-Gans model was used. Another factor that has been found is that the maximum temperature for gold nanoparticles is between (1000 K) and (1400 K), especially for the preparation of nanoparticles in the presence of 10 ns Nd:YAG.
Highlights
The word nanoscience is characterized as a range of technologies and developments that rely on nanoscale physical, chemical, and biological phenomena ranging from approximately 1 to 100 nanometers[1]
Nd:YAG laser produces 1064 nm pulses of an energy per pulse up to 1000 mJ, 10 ns pulse duration with a maximum repetition equal to 6Hz, while the second has an energy of 850 mJ and a pulse duration of 6 ns with a maximum repetition rate of 10 Hz.The focused Nd-YAG beam process is conducted using a 10 cm focal length lens on the cupper target
Experimental Results: TEM images of cupper (Cu) nanoparticles formed by laser ablation with a pulse length of 6 ns and a power of 700 and 720 mJ are shown in figures 3 A and 3 B, respectively
Summary
The word nanoscience is characterized as a range of technologies and developments that rely on nanoscale physical, chemical, and biological phenomena ranging from approximately 1 to 100 nanometers[1]. Nanomaterial methods of synthetization are either chemical or physical.Physical methods rely on wire technique, physical vapor deposition, thermal evaporation, sputtering deposition, deposition of chemical vapor and laser ablation, while there are two forms of laser ablation for the creation of NPs using laser ablation: dry and wet.In addition, Pulse Laser Ablation in Liquid (PLAL) requires the contact between the laser and the target, which can be used to create nanoparticles with colloidal suspension[5]. PLAL is defined as a one-step top-down preparation technique for nanoparticles[6].The key benefits of this method are 1- The ability to manufacture different kinds of nanomaterials, such as metals, noble metals, semiconductors, nanoalloys, oxides, magnetic and core shell nanostructure[7], 2- No need for vacuum equipment[8], 3- The aggregation can be regulated by surfactant molecules[9]. Where T(t) : Temperature (K) ,Fo : Surface absorbed power W/m 2 P K : Thermal conductivity W/m.K ,α :Thermal diffusivity mP2 sP−1 , P t : Time s ,z : Depth m , t1 : Time power off s and a,A1,C,b : Constant [10]
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