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  1. Article ; Online: Synthesis AgO Nanoparticles by Nd:Yag Laser with Different Pulse Energies

    Munaf S. Majeed / Shaymaa M. Mahmoud Mahmoud / Raghad Majeed Rasheed / Alaa Adnan Rashad

    Baghdad Science Journal, Vol 21, Iss

    2024  Volume 1

    Abstract: One technique used to prepare nanoparticles material is Pulsed Laser Ablation in Liquid (PLAL), Silver Oxide nanoparticles (AgO) were prepared by using this technique, where silver target was submerged in ultra-pure water (UPW) at room temperature after ... ...

    Abstract One technique used to prepare nanoparticles material is Pulsed Laser Ablation in Liquid (PLAL), Silver Oxide nanoparticles (AgO) were prepared by using this technique, where silver target was submerged in ultra-pure water (UPW) at room temperature after that Nd:Yag laser which characteristics by 1064 nm wavelength, Q-switched, and 6ns pulse duration was used to irradiated silver target. This preparation method was used to study the effects of laser irradiation on Nanoparticles synthesized by used varying laser pulse energy 1000 mJ, 500 mJ, and 100 mJ, with 500 pulses each time on the particle size. Nanoparticles are characterized using XRD, SEM, AFM, and UV-Visible spectroscopy. All the structural peaks determined by the XRD test can be indexed as face-centered cubic (FCC) type, the stronger crystalline orientation is located in the (111) plane. The nanoscale particles have an almost spherical shape as inferred from the SEM images. In (1000) mJ laser pulse energy the best smallest particle size was produced. According to AFM results of all films, the particle size 32.45nm, 64.3nm, and 67.86nm respectively for 1000 mJ, 500 mJ, and 100 mJ , the surface roughness affected and increased as increase the laser energy because the increase particle size and aggregation of partials. UV-Visible spectroscopy measured the absorbance of the silver nanoparticle prepared which is increased as increase pulsed laser ablation energy at wavelength 440 nm.
    Keywords AgO Nanoparticles ; Nd:Yag Laser ; Particle size ; Pulsed Laser Ablation Technique ; UV-Visible spectroscopy ; Science ; Q
    Subject code 620
    Language Arabic
    Publishing date 2024-01-01T00:00:00Z
    Publisher College of Science for Women, University of Baghdad
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Frequency doubling by nonlinearity of TiO2 nanomaterial

    Rabea Q. Nafil / Munaf S. Majeed

    Heliyon, Vol 6, Iss 3, Pp e03649- (2020)

    2020  

    Abstract: We reported titanium dioxide nanoparticles solution (TiO2 NPS) preparation by the sol-gel method. The produced NPS was employed as a liquid crystal to generate the second harmonic (SH) of one part of the pumping Nd: YAG laser at different pumping ... ...

    Abstract We reported titanium dioxide nanoparticles solution (TiO2 NPS) preparation by the sol-gel method. The produced NPS was employed as a liquid crystal to generate the second harmonic (SH) of one part of the pumping Nd: YAG laser at different pumping intensities. The remaining part of the pumping laser was focused on a stander nonlinear material (NPP63) to produce another SH pulse (to be used as a reference). Then the two SH pulses (one from TiO2 and one from NPP63) were used to calculate the nonlinear coefficient (β) of the synthesized TiO2 Nano solution. The suggested method represents a simple and inexpensive setup for calculation β by excluding the very expensive femtosecond laser used in previous studies. The results reveal that β for the prepared TiO2 nanoparticles is very large (5.3×10−26 esu).
    Keywords Optics ; Nonlinear physics ; Nonlinear optics ; Nanomaterials ; Frequency doubling ; Laser ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
    Subject code 535
    Language English
    Publishing date 2020-03-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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