Construction of Ag nanowire@Au nanoparticle nano nests with densely stacked small gaps for actively trapping molecules to realize diversity SERS detection
| Autor: | Tao Xie, Pan Li, Meihong Ge, Siyu Chen, Guangyao Huang, Junxiang Li, Meiting Gong, Shirui Weng, Liangbao Yang |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | The Analyst. 147:2541-2548 |
| ISSN: | 1364-5528 0003-2654 |
| DOI: | 10.1039/d2an00527a |
| Popis: | Highly sensitive surface-enhanced Raman spectroscopy (SERS) sensing not only depends on an active substrate with high density of hot spots, but also depends more on whether the molecules can effectively enter the hot spot region. In this paper, a new SERS detection method based on the nano nest model is developed to autonomously capture molecules into hot spots. The nano nest is composed of silver nanowires modified with gold nanoparticles (Ag NW@Au NPs), which not only form high density hot spots between particles or particles-wires, but also have a coupled electromagnetic field enhancement effect. The SERS detection method based nano nest actively traps molecules through the capillary stage, and makes the molecules move toward densely stacked small gaps (hot spots) by capillary action. The above method has been used to detect different kinds of molecules, such as pesticide residues, adenosine triphosphate in culture medium, and antibiotic residues in aquatic products. In addition, an |
| Databáze: | OpenAIRE |
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