Novel Ag/Au/Pt trimetallic nanocages used with surface-enhanced Raman scattering for trace fluorescent dye detection
| Autor: | Ching-Hsiang Chen, Tran Thi Bich Quyen, Bing-Joe Hwang, Wei-Nien Su, John Rick, Jyong-Yue Liu |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Biomedical Engineering Analytical chemistry Nanoparticle General Chemistry General Medicine engineering.material Photochemistry Fluorescence Rhodamine symbols.namesake chemistry.chemical_compound Nanocages chemistry Transmission electron microscopy symbols engineering General Materials Science Noble metal Bimetallic strip Raman scattering |
| Zdroj: | Journal of materials chemistry. B. 2(34) |
| ISSN: | 2050-7518 |
| Popis: | Trimetallic nanostructures have received considerable attention in recent years, due to their widespread use in photonics, catalysis, and surface-enhanced Raman scattering (SERS) detection. Nanoparticles consisting of multiple (n ≥ 3) noble metal components, synthesized under controlled conditions, show better SERS-active stability than mono- or bimetallic nanoparticles. In this work, a simple and novel protocol was used for the synthesis of hollow or porous Ag/Au/Pt trimetallic nanocages, based on a galvanic replacement reaction and co-reduction of the corresponding ions. The nanocages were characterized by UV-vis spectroscopy, transmission electron microscopy (TEM), high-resolution TEM, and X-ray diffraction. It was also demonstrated that the Ag/Au/Pt trimetallic nanocages were both extremely SERS-active and stable. Our results show that Rhodamine 3B, used as a fluorescent marker, could be detected over a wide concentration range from 10−15 to 10−8 M, with the lower limit of detection being 10−15 M. |
| Databáze: | OpenAIRE |
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