摘要: Bimetallic nanocatalysts often display enhanced physical and chemical properties compared to those of their monometallic counterparts. Herein, we introduce a simple method to fabricate an island like array of tiny Ag nanoparticles bounded on triangular Au nanoplates as the surface-enhanced Raman scattering (SERS) substrate. The surface morphology of the synthesized nanoparticles was characterized via field emission scanning electron microscopy (FE-SEM), and atomic force microscopy (AFM). Rhodamine 6G (R6G) is used as a model analyte to evaluate the performance of the tiny Ag nanoparticle bounded triangular Au nanoplates as a SERS-active substrate and validate the SERS effect. The fabricated SERS substrate showed drastically enhanced intensity with a SERS enhancement factor as high as 107, which is enough to detect a single molecule, and excellent reproducibility (less than `5%) of the signal intensity. This is because of the island-like tiny Ag nanoparticle bounded triangular Au nanoplates and their large number of “hot spots”. This substrate could also be used for label-free immunoassays, biosensing, and nanoscale optical antennas and light sources.
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期刊:
RSC ADVANCES
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分类:
物理学
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普通物理:统计和量子力学,量子信息等
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引用:
ChinaXiv:201705.00501
(或此版本
ChinaXiv:201705.00501V1)
DOI:10.12074/201705.00501V1
CSTR:32003.36.ChinaXiv.201705.00501.V1
- 推荐引用方式:
Huang, YJ [Huang, Youju][ 1 ],Kannan, P [Kannan, Palanisamy][ 2 ],Zhang, L [Zhang, Lei][ 1 ],Rong, Y [Rong, Yun][ 1 ],Dai, LW [Dai, Liwei][ 1 ],Huang, RQ [Huang, Rongqin][ 3 ],Chen, T [Chen, Tao][ 1 ].(2017).Close-packed assemblies of discrete tiny silver nanoparticles on triangular gold nanoplates as a high performance SERS probe.RSC ADVANCES.[ChinaXiv:201705.00501]
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