Alattar Ashraf M, Al-Sharuee Israa F, Odah Jafer Fahdel
Department of Medical Physics, College of Science, Al-Karkh University of Science, Baghdad, Iraq.
Department of Physics, College of Science, Mustansiriyah University, Baghdad, Iraq.
J Med Phys. 2024 Jan-Mar;49(1):95-102. doi: 10.4103/jmp.jmp_153_23. Epub 2024 Mar 30.
The efficacy of fractionation is significantly impacted by the colloidal particles' spontaneous absorption of laser beam radiation. The classification of silver nanoparticles during fragmentation processing is regulated through the collection of a combination of laser pulses with wavelengths of 1064 nm and 532 nm.
This study presents an investigation of the efficacy of a plant extract in conjunction with the incorporation of supplementary silver nanoparticles, as well as the generation of smaller-sized silver nanoparticles using laser fragmentation.and then measure thier toxity on the blood.
Ag nanoparticles were synthesized using pulsed laser fragmentation on green tea AgNPs. The synthesis process involved the utilization of a Q-switch Nd:YAG laser with wavelengths of 1064 nm and 532 nm, with energy ranging from 200 to 1000 mJ. Initially, a silver nano colloid was synthesized through the process of fragmented of the Ag target using the second harmonic generation of 532 nm at various energy levels. The optimal energy within the selected wavelengths was determined in order to facilitate the ultimate comparison. Transmission electron microscopy (TEM) was used to determine surface morphology and average particle size, while a spectrophotometer was used to analyses UV light's spectrum characteristics. The measurements focused on the surface plasmon resonance (SPR) phenomenon. The absorption spectra of silver nanoparticles exhibit distinct and prominent peaks at wavelengths of 405 nm and 415 nm. The mean diameter of the silver nanoparticles was found to be 16 nm and 20 nm, corresponding to wavelengths of 1064 nm and 532 nm, respectively.
As a consequence, there is a decrease in the range of particle sizes and a decrease in the mean size to lower magnitudes, resulting in a very stable colloid. This particular methodology has demonstrated considerable efficacy in the production of colloidal suspensions with the intended particle dimensions. Moreover, by the analysis of nanoparticles in human blood, no discernible alterations in the blood constituents were seen, indicating their non-toxic nature.
分馏的效果受到胶体颗粒对激光束辐射的自发吸收的显著影响。在破碎过程中，银纳米颗粒的分类是通过收集波长为1064nm和532nm的激光脉冲组合来调节的。
本研究旨在探讨植物提取物与补充银纳米颗粒结合的效果，以及利用激光破碎产生更小尺寸的银纳米颗粒，然后测量它们对血液的毒性。
使用脉冲激光破碎法在绿茶银纳米颗粒上合成了银纳米颗粒。合成过程中使用了波长为1064nm和532nm的调Q Nd:YAG激光，能量范围为200至1000mJ。最初，通过在不同能量水平下使用532nm的二次谐波对银靶进行破碎过程合成了银纳米胶体。为了便于最终比较，确定了所选波长内的最佳能量。使用透射电子显微镜（TEM）确定表面形态和平均粒径，同时使用分光光度计分析紫外光的光谱特性。测量重点是表面等离子体共振（SPR）现象。银纳米颗粒的吸收光谱在405nm和415nm波长处呈现出明显且突出的峰。发现银纳米颗粒的平均直径分别为16nm和20nm，对应于波长1064nm和532nm。
因此，粒径范围减小，平均尺寸减小到更低的量级，从而形成非常稳定的胶体。这种特定方法在生产具有预期颗粒尺寸的胶体悬浮液方面已显示出相当的效果。此外，通过对人体血液中的纳米颗粒进行分析，未观察到血液成分有明显变化，表明它们无毒。
