Research on spectral characteristics of laser-induced plasma by combining Au-nanoparticles and magnetic field confinement on Cu
Research on spectral characteristics of laser-induced plasma by combining Au-nanoparticles and magnetic field confinement on Cu
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DOI：
10.1016/j.ijleo.2018.05.114
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发表时间：
2018-01-01
期刊：
影响因子：
3.1
通讯作者：
Hu, Xiaotao
中科院分区：
文献类型：
--
作者：
Tang, Huijuan;Hao, Xiaojian;Hu, Xiaotao
为了增强激光诱导等离子体发射光谱的强度，提出了磁场增强激光诱导击穿光谱（LIBS）与纳米颗粒增强LIBS（NELIBS）相结合的方法。分别采用传统LIBS、磁场增强LIBS、NELIBS以及磁场增强LIBS和NELIBS的组合对铜进行了激光诱导击穿实验，获得了电子温度、电子密度和信噪比等参数，并进行了分析。实验结果表明，在LIBS中，将纳米金颗粒（Au NPs）与磁场结合，能有效地增强等离子体的光谱强度，显著提高信噪比，在激光脉冲能量为80 mJ时达到最佳;电子温度和电子密度变化不明显，显著提高了LIBS检测痕量元素的能力。
In order to enhance the intensity of emission spectra of laser-induced plasma, a method of combining magnetic field enhanced laser induced breakdown spectroscopy(LIBS) with nanoparticle enhanced LIBS (NELIBS) was proposed. Laser-induced breakdown of copper was respectively performed by using traditional LIBS, magnetic field-enhanced LIBS, NELIBS, and the combination of the magnetic field enhanced LIBS and NELIBS.Some parameters including electron temperature, electron density and signal-to-noise ratio were obtained and analyzed. The experimental results show that when the Au-nanoparticles(Au NPs) are combined with magnetic field in LIBS, the spectral intensity of plasma is effectively enhanced and, the signal-to-noise ratio is significantly improved, and the optimum is achieved when the laser pulse energy is 80 mJ; the electron temperature and the electron density do not change obviously, the ability of using LIBS to detect trace elements is significantly improved.