Gold nanoparticle-based optical microfluidic sensors for analysis of environmental pollutants
Gold nanoparticle-based optical microfluidic sensors for analysis of environmental pollutants
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DOI：
10.1039/c2lc40543a
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发表时间：
2012-11-21
期刊：
影响因子：
6.1
通讯作者：
Kutter, Jorg P.
中科院分区：
文献类型：
--
作者：
Lafleur, Josiane P.;Senkbeil, Silja;Kutter, Jorg P.
随着便携式微尺度技术的发展，可以大大改进传统的环境分析方法，以便在偏远地区直接进行现场监测。这份报告展示了基于金纳米颗粒的微流控传感器在现场快速检测两类重要环境污染物--重金属和农药--的巨大潜力。用金纳米微粒微流控传感器与简易数码相机连接作为检测器，对重金属汞和二硫代氨基甲酸酯类农药齐拉姆的检出限分别可达到0.6mg L-1和16mgL-1。这些结果表明，金纳米颗粒探测器诱人的光学特性与微流控平台的固有特性相结合，为环境污染物提供了简单、便携和灵敏的传感器。
Conventional methods of environmental analysis can be significantly improved by the development of portable microscale technologies for direct in-field sensing at remote locations. This report demonstrates the vast potential of gold nanoparticle-based microfluidic sensors for the rapid, in-field, detection of two important classes of environmental contaminants - heavy metals and pesticides. Using gold nanoparticle-based microfluidic sensors linked to a simple digital camera as the detector, detection limits as low as 0.6 mu g L-1 and 16 mu g L-1 could be obtained for the heavy metal mercury and the dithiocarbamate pesticide ziram, respectively. These results demonstrate that the attractive optical properties of gold nanoparticle probes combine synergistically with the inherent qualities of microfluidic platforms to offer simple, portable and sensitive sensors for environmental contaminants.