[RSC Advances] Close-packed assemblies of discrete tiny silver nanoparticles on triangular gold nanoplates as high performance SERS probe
作者：Youju Huang,* Palanisamy Kannan, Lei Zhang, Yun Rong, Liwei Dai, Rongqin Huang and Tao Chen *
关键字：Gold NPs, Ag Nps, Hybrid, SERS Probes
论文来源：期刊
具体来源：RSC Advances, 2015, 5, 94849-94854
发表时间：2015年
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
nanoparticles bounded triangular Au nanoplates as a SERS-active substrate and
validate the SERS effect. Fabricated SERS substrate is 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 islands like tiny Ag
nanoparticles bounded triangular Au nanoplates and its large “hot spots”. This substrate
could also be used for label-free immunoassays, biosensing, and nanoscale
optical antennas and light sources.