Inkjet printing lanthanide doped nanorods test paper for visual assays of nitroaromatic explosives.
Inkjet printing lanthanide doped nanorods test paper for visual assays of nitroaromatic explosives.
复制标题
DOI：
10.1016/j.aca.2013.10.002
复制
发表时间：
2013-11
影响因子：
6.2
通讯作者：
Liang Hong;Qingsong Mei;Lei Yang;Cheng Zhang;Renyong Liu;M. Han;Ruilong Zhang;Zhongpin Zhang
中科院分区：
文献类型：
--
作者：
Liang Hong;Qingsong Mei;Lei Yang;Cheng Zhang;Renyong Liu;M. Han;Ruilong Zhang;Zhongpin Zhang
在许多具有挑战性的环境中，特别是在打击恐怖主义的国土安全中，检测硝基芳香炸药的简便而敏感的策略是非常需要的。在这里，我们将聚乙烯亚胺（PEI）涂层的Ce， Tb共掺杂的NaGdF4纳米棒（NaGdF4:Ce/Tb NRs）喷墨打印到普通滤纸上，以构建用于视觉和即时检测典型爆炸物2,4,6-三硝基苯酚（TNP）的试纸。聚乙烯亚胺分子不仅有利于形成均匀的nagdf4纳米棒，而且通过酸碱配对相互作用为TNP提供了特定的识别位点。在pei包覆的NaGdF4:Ce/Tb NRs表面结合的TNP可以通过从NaGdF4:Ce/Tb NRs到TNP的电荷转移机制强烈猝灭磷光，猝灭常数非常高。通过将探针打印在一张滤纸上，在紫外线灯下，可以通过在亮绿色背景下的深色外观来直观地检测微量的TNP。该试纸可以通过肉眼检测到低至0.45 ng mm−2的TNP，这为快速在线检测爆炸物提供了潜在的应用。
The facile and sensitive strategies for detections of nitroaromatic explosives are highly desirable in many challenging environments, especially for homeland security against terrorism. Here, we inkjet printed polyethylenimine (PEI)-coated Ce, Tb co-doped NaGdF4nanorods (NaGdF4:Ce/Tb NRs) onto common filter paper to construct test paper for visual and instant detections of a typical explosive 2,4,6-trinitrophenol (TNP). Polyethylenimine molecules not only facilitate the formation of uniform NaGdF4nanorods but also provide specific recognized sites for TNP by the acid–base pairing interaction. The resultant TNP bound at the surface of PEI-coated NaGdF4:Ce/Tb NRs can strongly quench the phosphorescence with a remarkably high quenching constant by the charge transfer mechanism from NaGdF4:Ce/Tb NRs to TNP. By printing of the probe on a piece of filter paper, trace amounts of TNP can be visually detected by the appearance of a dark color against a bright green background under a UV lamp. This test paper can detect TNP as low as 0.45 ng mm−2by the naked eye, which provides a potential application in the rapid, on-line detections of explosives.