Identification of TiO2 nanoparticles using La and Ce as labels: application to the evaluation of surface contamination during the handling of nanosized matter
Identification of TiO2 nanoparticles using La and Ce as labels: application to the evaluation of surface contamination during the handling of nanosized matter
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DOI：
10.1039/c4en00060a
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发表时间：
2014-10-01
影响因子：
7.3
通讯作者：
Santamaria, Jesus
中科院分区：
文献类型：
--
作者：
Gomez, Virginia;Clemente, Alberto;Santamaria, Jesus
将感兴趣的纳米材料与已经存在于采样环境中的背景纳米级物质区分开来是一项具有挑战性的任务。在这项研究中，我们建议使用稀土元素（REEs）作为高灵敏度的标签，以识别和监测其命运后操纵。稀土元素的标签添加在合成的二氧化钛纳米粒子的流体动力学尺寸为15 nm。稀土标记的纳米材料允许监测在手套箱中处理纳米颗粒材料期间形成的纳米颗粒气溶胶。标记的二氧化钛纳米粒子在工作表面上的沉积可以通过电子显微镜和表面分析来验证，使用镧系元素的存在作为识别标记。沉积材料中的TiO 2纳米颗粒的总量可以通过基于擦拭沉积区域，然后消化收集的物质并通过火焰发射光谱法分析的程序来定量。
Distinguishing nanomaterials of interest from background nanosized matter already present in the sampling environment is a challenging task. In this study, we propose the use of rare earth elements (REEs) as high-sensitivity labels to identify and to monitor their fate following manipulation. The REE labels were added during the synthesis of TiO2 nanoparticles with hydrodynamic sizes of 15 nm. The REE-labelled nanomaterials allow the monitoring of nanoparticle aerosols formed during handling of nanoparticulate materials in a glove box. The deposition of the labelled TiO2 nanoparticles on working surfaces could be verified by electron microscopy and surface analysis, using the presence of lanthanide elements as an identification label. The total amount of TiO2 nanoparticles in the deposited material could be quantified by a procedure based on wiping the deposition area followed by digestion of the collected matter and analysis by flame emission spectrometry.