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Fabrication of a honeycomb-like bimetallic SERS substrate for the detection of triphenyltin chloride
Analyst ( IF 3.6 ) Pub Date : 2021-08-31 , DOI: 10.1039/d1an01359a Shan Jiang 1, 2 , Lin Chang 1, 2 , Jie Luo 3 , Jianfa Zhang 3 , Xiaohong Liu 1 , Chong-Yew Lee 4 , Wei Zhang 1, 2
Analyst ( IF 3.6 ) Pub Date : 2021-08-31 , DOI: 10.1039/d1an01359a Shan Jiang 1, 2 , Lin Chang 1, 2 , Jie Luo 3 , Jianfa Zhang 3 , Xiaohong Liu 1 , Chong-Yew Lee 4 , Wei Zhang 1, 2
Affiliation
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Triphenyltin chloride (TPhT) is an organotin compound that causes intensive toxicological risk to the environment and humans. A detection method with high sensitivity and stability is therefore desired to better detect TPhT. In this study, a novel SERS substrate was prepared by sputtering an ultra-thin Au layer on a honeycomb-like silver nanoarray fabricated via the nanosphere lithography method. The ultra-thin Au layer was formed by sputtering the intermittent Au nanoparticles on the silver nanoarray, resulting in bimetallic coupling with dramatically increased hotspots and extremely high SERS enhancement with an analytical enhancement factor (AEF) of 6.08 × 109 using Rhodamine 6G (R6G) as the probe molecule. Based on density functional theory (DFT) simulations, the Raman characteristic peaks of TPhT at 999 cm−1 and 655 cm−1 were selected for TPhT detection. The AEF of the SERS substrate HC5-AgAu was calculated to be 3.38 × 106 with the detection concentration of TPhT down to 10−10 M. The as-prepared honeycomb-like silver–gold bimetallic SERS substrate demonstrated great stability and sensitivity for TPhT detection, which might also be applied in monitoring many other environmental pollutants.
中文翻译：
用于检测氯化三苯基锡的蜂窝状双金属 SERS 基底的制备
三苯基氯化锡 (TPhT) 是一种有机锡化合物，会对环境和人类造成严重的毒理学风险。因此需要一种具有高灵敏度和稳定性的检测方法以更好地检测TPhT。在这项研究中，通过在通过纳米球光刻方法制造的蜂窝状银纳米阵列上溅射超薄 Au 层制备了一种新型 SERS 衬底。超薄金层是通过在银纳米阵列上溅射间歇性金纳米粒子形成的，导致双金属耦合，热点显着增加和极高的 SERS 增强，分析增强因子 (AEF) 为 6.08 × 10 9使用罗丹明 6G (R6G) 作为探针分子。基于密度泛函理论（DFT）模拟，选择TPhT在999 cm -1和655 cm -1处的拉曼特征峰用于TPhT检测。SERS 基底 HC5-AgAu 的 AEF 计算为 3.38 × 10 6，TPhT的检测浓度低至 10 -10 M。所制备的蜂窝状银-金双金属 SERS 基底对 TPhT 表现出很好的稳定性和灵敏度检测，这也可能应用于监测许多其他环境污染物。
更新日期：2021-09-15
中文翻译：
用于检测氯化三苯基锡的蜂窝状双金属 SERS 基底的制备
三苯基氯化锡 (TPhT) 是一种有机锡化合物，会对环境和人类造成严重的毒理学风险。因此需要一种具有高灵敏度和稳定性的检测方法以更好地检测TPhT。在这项研究中，通过在通过纳米球光刻方法制造的蜂窝状银纳米阵列上溅射超薄 Au 层制备了一种新型 SERS 衬底。超薄金层是通过在银纳米阵列上溅射间歇性金纳米粒子形成的，导致双金属耦合，热点显着增加和极高的 SERS 增强，分析增强因子 (AEF) 为 6.08 × 10 9使用罗丹明 6G (R6G) 作为探针分子。基于密度泛函理论（DFT）模拟，选择TPhT在999 cm -1和655 cm -1处的拉曼特征峰用于TPhT检测。SERS 基底 HC5-AgAu 的 AEF 计算为 3.38 × 10 6，TPhT的检测浓度低至 10 -10 M。所制备的蜂窝状银-金双金属 SERS 基底对 TPhT 表现出很好的稳定性和灵敏度检测，这也可能应用于监测许多其他环境污染物。
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