Dipping into a drink: Basil-seed supported silver nanoparticles as surface-enhanced Raman scattering substrates for toxic molecule detection

Dipping into a drink: Basil-seed supported silver nanoparticles as surface-enhanced Raman scattering substrates for toxic molecule detection
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浸入饮料中:罗勒籽支持的银纳米颗粒作为表面增强拉曼散射基质,用于有毒分子检测

DOI:
10.1016/j.snb.2015.09.115
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发表时间:
2016-02
期刊:
Sensors and Actuators B: Chemical
影响因子:
--
通讯作者:
Qing Huang
Qing Huang
中科院分区:
其他
文献类型:
--
作者:
Qitao Zhou;Guowen Meng;Nianqiang Wu;Ningning Zhou;Bensong Chen;Fadi Li;Qing Huang

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在天然罗勒种子的三维骨架上合成了高密度的等离子体银纳米粒子(Ag-NPs),作为廉价的表面增强拉曼散射(Sers)基底。将Ag-NPs修饰的罗勒种子(表示为Ag-NPs@罗勒种子)浸入分析物溶液中,用于快速检测橙子汁中的甲基异硫氰酸根。或者,它们被整合到微流控芯片中,用于在线测量牛奶中的三聚氰胺。多孔罗勒种子可以将微量三聚氰胺吸附到种子内部的微腔中,从而将三聚氰胺分子负载到差距中,在激光激发下,缝隙中出现高密度的“热点”。因此,Ag-NP @罗勒种子不仅分离和预浓缩痕量分析物,而且还将分析物暴露于强等离子体场中。这种独特的功能可以消除Sers检测之前对分析物的预处理,并提高传感器的灵敏度。
High-density plasmonic Ag nanoparticles (Ag-NPs) have been synthesized on a three-dimensional framework of natural basil seeds as the inexpensive substrates for surface-enhanced Raman scattering (SERS). The Ag-NPs decorated basil seeds (denoted as Ag-NPs@basil-seeds) are dipped into the analyte solution for rapid detection of methyl parathion in orange juice. Alternatively, they are incorporated into a microfluidic chip for online measurement of melamine in milk. The porous basil seeds can absorb trace melamine into the micro-cavity in the seeds, which load the melamine molecules into the gap where high-density “hot spots” appear under laser excitation. Hence the Ag-NPs@basil-seeds not only separate and pre-concentrate the trace analyte but also expose the analyte into the strong plasmonic field. This unique feature can eliminate the pre-treatment of analyte prior to SERS detection, and improve the sensitivity of the sensor.
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