The optical property of core-shell nanosensors and detection of atrazine based on localized surface plasmon resonance (LSPR) sensing.
The optical property of core-shell nanosensors and detection of atrazine based on localized surface plasmon resonance (LSPR) sensing.
复制标题
基于局域表面等离子体共振（LSPR）传感的核壳纳米传感器的光学特性和莠去津的检测
DOI：
10.3390/s140713273
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发表时间：
2014-07-23
期刊：
影响因子：
--
通讯作者：
Tan W
中科院分区：
文献类型：
--
作者：
Yang S;Wu T;Zhao X;Li X;Tan W
采用分子自组装和蒸发技术制备了三种不同的核壳结构纳米传感器。这种紧密堆积的纳米颗粒表现出精细的光学性质，这对于生物化学传感是有用的。通过改变周围介质的折射率来检测纳米传感器的折射率灵敏度（RIS），并使用逐层叠层组装来研究纳米传感器的衰减长度。结果表明，Au壳层的厚度对RIS和衰变长度起着重要的作用。本研究建立了一套基于局域表面等离子体共振（LSPR）的传感系统。该传感器可检测10 ng/mL的阿特拉津溶液，适用于农药残留检测。
Three different nanosensors with core-shell structures were fabricated by molecular self-assembly and evaporation techniques. Such closely packed nanoparticles exhibit fine optical properties which are useful for biochemical sensing. The refractive index sensitivity (RIS) of nanosensors was detected by varying the refractive index of the surrounding medium and the decay length of nanosensors was investigated using a layer-by-layer polyelectrolyte multilayer assembly. The results showed that the thickness of the Au shell plays an important role in determining the RIS and the decay length. A system based on localized surface plasmon resonances (LSPR) sensing was constructed in our study. The core-shell nanosensors can detect 10 ng/mL atrazine solutions and are suitable for pesticide residue detection.
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