Institute of Modern Optics, Nankai University, Tianjin 300071, China.
Environ Technol. 2012 Sep;33(16-18):2071-5. doi: 10.1080/09593330.2012.660643.
In this study, we employed the metal-enhanced fluorescence (MEF) method for the detection of polycyclic aromatic hydrocarbons (PAHs) in diesel oil emulsions in artificial seawater. Silver nanoparticles with an average diameter of 80 nm were immobilized onto silanized quartz as MEF substrates. Excited by illumination at 355 nm, a 4.6-fold increase in the fluorescence signals of PAHs was recorded when MEF substrates were used. The finite-difference time-domain (FDTD) method was used to provide mechanistic insights into the fluorescence enhancement. Monitoring water pollution has environmental significance and MEF spectroscopy is finding direct applications in this field.
在这项研究中，我们采用金属增强荧光（MEF）方法检测人工海水中柴油乳液中的多环芳烃（PAHs）。将平均直径为 80nm 的银纳米粒子固定在硅烷化石英上作为 MEF 基底。在 355nm 的光激发下，当使用 MEF 基底时，PAHs 的荧光信号增加了 4.6 倍。我们使用时域有限差分（FDTD）方法提供了荧光增强的机理见解。监测水污染具有环境意义，MEF 光谱在这一领域正得到直接应用。
