Lab-on-Fiber Sensors with Ag/Au Nanocap Arrays Based on the Two Deposits of Polystyrene Nanospheres.
Lab-on-Fiber Sensors with Ag/Au Nanocap Arrays Based on the Two Deposits of Polystyrene Nanospheres.
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DOI：
10.3390/polym15204107
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发表时间：
2023-10-16
期刊：
影响因子：
5
通讯作者：
Li Z
中科院分区：
文献类型：
--
作者：
Shi M;Gao S;Shang L;Ma L;Wang W;Liu G;Li Z
表面增强拉曼光谱(SERS)可以显着提高原始拉曼信号，可用于制造具有先进性能的新型传感器件。然而，SERS系统固有的复杂性限制了其在快速检测方面的进一步应用，特别是在狭窄区域的原位检测。在这里，我们通过在光纤表面涂覆聚苯乙烯纳米球得到的Ag/Au纳米帽阵列，构建了一种高效、灵活的基于SERS的光纤上实验室(Lab-on-Fiber，LOF)传感器。我们在相邻的纳米帽之间的纳米缝隙处获得了丰富的热点，并借助激光诱导金属薄膜上的热电泳法进一步实现了SERS性能，实现了被检测分子的高效聚集。对于基于上述传感器的最有效的样品，我们实现了很高的拉曼增强，低检测下限为10−7mol/L。该传感器在多次检测下表现出良好的重复性和稳定性，在基于光纤反射率的在线检测中具有潜在的应用前景。
Surface-enhanced Raman spectroscopy (SERS) can boost the pristine Raman signal significantly which could be exploited for producing innovative sensing devices with advanced properties. However, the inherent complexity of SERS systems restricts their further applications in rapid detection, especially in situ detection in narrow areas. Here, we construct an efficient and flexible SERS-based Lab-on-Fiber (LOF) sensor by integrating Ag/Au nanocap arrays obtained by Ag/Au coating polystyrene nanospheres on the optical fiber face. We obtain rich “hot spots” at the nanogaps between neighboring nanocaps, and further achieve SERS performance with the assistance of laser-induced thermophoresis on the metal film that can achieve efficiency aggregation of detected molecules. We achieve a high Raman enhancement with a low detection limitation of 10−7 mol/L for the most efficient samples based on the above sensor. This sensor also exhibits good repeatability and stability under multiple detections, revealing the potential application for in situ detection based on the reflexivity of the optical fiber.
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影响因子：
2.8
作者：
Liu, Ting;Xiao, Xiaosheng;Yang, Changxi
通讯作者：
Yang, Changxi
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影响因子：
8.4
作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1073/pnas.1518980113
发表时间：
2016-01-12
影响因子：
11.1
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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