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首页> 外文期刊>RSC Advances >Robust and cost-effective silver dendritic nanostructures for SERS-based trace detection of RDX and ammonium nitrate
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Robust and cost-effective silver dendritic nanostructures for SERS-based trace detection of RDX and ammonium nitrate

机译：鲁棒且经济高效的银树枝状纳米结构，用于基于SERS的RDX和硝酸铵的痕迹检测

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摘要

We report the fabrication and performance evaluation of cost-effective, reproducible silver nanodendrite (AgND) substrates, possessing high-density trunks and branches, achieved by a simple electroless etching process and subsequently utilized them for the trace detection of 1,3,5-trinitroperhydro-1,3,5-triazine (Research Development Explosive, RDX) and Ammonium Nitrate (AN). The intricate structural features in AgNDs offer high-density hotspots for effective molecular detection based on the surface enhanced Raman scattering (SERS) technique. The active SERS-substrate was initially tested with standard Rhodamine 6G (R6G) molecules at 1 nM concentration, which established an effective enhancement factor (EF) of ～10 ~(8) . The AgNDs were subsequently utilized in the detection of the explosives RDX and AN, down to concentrations of 1 μM. The typical EF achieved in the case of RDX and AN was ～10 ~(4) . The sensitivity of 1 μM R6G was further enhanced by two-fold through the deposition of Au nanoparticles on the AgNDs. The reproducibility of the low-cost substrate was also demonstrated, with a ～9% RSD value in the measurements.
机译：我们报告了通过简单的无电蚀刻工艺实现的具有高密度树干和分支的成本效益，可重复的银纳秒（AGND）基板的制造和性能评估，随后利用它们为痕量检测为1,3,5- TrinitroperHydro-1,3,5-三嗪（研究发展爆炸，RDX）和硝酸铵（AN）。基于表面增强拉曼散射（SERS）技术，AGNDS中的复杂结构特征提供了高密度热点，用于基于表面增强的拉曼散射（SERS）技术。最初用标准罗丹明6g（R6G）分子以1nM浓度的标准罗丹明6g（R6G）分子测试活性SERs-基材，其建立了〜10〜（8）的有效增强因子（EF）。随后在检测爆炸物RDX和下降至1μm的浓度之后使用该AGNDS。在RDX和AN〜10〜（4）的情况下实现的典型EF。通过沉积Au纳米颗粒对Agnds的沉积进一步增强1μmr6g的敏感性。还证明了低成本基质的再现性，测量中具有〜9％的RSD值。

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