Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/5235
Title: Novel Ag/Au/Pt trimetallic nanocages used with surface-enhanced Raman scattering for trace fluorescent dye detection
Authors: Trần, Thị Bích Quyên
Liu, Jyong-Yue
Chen, Ching-Hsiang
Hwang, Bing-Joe
Rick, John
Su, Wei-Nien
Keywords: Surface-enhanced Raman scattering
Ag nanocubes
Ag/Au/Pt trimetallic nanocages
Rhodamine 3B
Trimetallic nanocages
Issue Date: 2014
Series/Report no.: Journal of Materials Chemistry B;2 .- p.1-26
Abstract: 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 10ˉ¹⁵ to 10⁻⁸ M, with the lower limit of detection being 10ˉ¹⁵ M.
URI: http://localhost:8080//jspui/handle/123456789/5235
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