SERS-active composite based on rGO and Au/Ag core-shell nanorods for analytical applications
SERS-active composite based on rGO and Au/Ag core-shell nanorods for analytical applications
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DOI：
10.1016/j.snb.2017.07.034
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发表时间：
2018
影响因子：
8.4
通讯作者：
Jiawen Yu;Yanan Ma;Congxing Yang;Hang Zhang;Lijun Liu;J. Su;Yihua Gao
中科院分区：
文献类型：
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作者：
Jiawen Yu;Yanan Ma;Congxing Yang;Hang Zhang;Lijun Liu;J. Su;Yihua Gao
本工作提出了一种新的方法来合成由还原氧化石墨烯和Au/Ag核壳纳米棒组成的功能杂化材料（rGO-Au@AgNRs）。该杂化材料对罗丹明6 G（R6 G）的检测增强因子（EF）高达（5.0 ± 0.2）× 108，是rGO-AuNRs的4倍。与SERS活性基底Au@Ag（不含rGO）相比，rGO-Au@ AgNR上的R6 G的拉曼强度具有显著增强，特别是在611 cm-1的拉曼峰处，约为17倍。我们还使用rGO-Au@AgNRs来监测农药福美双，在561 cm−1处的低水平为10− 7 M，RSD为7.5%。用rGO-Au@AgNRs检测福美双的检出限（LOD）为5.12 × 10−3μM，表明rGO-Au@AgNRs在环境污染物检测方面具有潜在的应用价值。
This work demonstrated a new method to synthesize the functional hybrid material composed of reduced graphene oxide and Au/Ag core-shell nanorods (rGO-Au@AgNRs). The hybrid material can detect rhodamine-6G (R6G) with an enhancement factor (EF) up to (5.0 ± 0.2) × 108, 4 fold higher than that of the rGO-AuNRs. Comparing with SERS-active substrate Au@Ag (without rGO), the Raman intensity of R6G on the rGO-Au@AgNRs has significant enhancement, especially at the Raman peak of 611 cm−1, around 17 times. We also use rGO-Au@AgNRs to monitor the pesticide thiram at a low level ∼10−7M and RSD 7.5% at the 561 cm−1. The limit of detection (LOD) of thiram using rGO-Au@AgNRs was low to 5.12 × 10−3μM, which suggested that the rGO-Au@AgNRs has potential applications in the detection of environment pollutantsetc.