Surface-enhanced Raman Scattering Study of Individual Flower-like Silver Nanoparticles

doi:10.13883/j.issn1004-5929.202001005

Chinese Journal of Light Scattering ›› 2020, Vol. 32 ›› Issue (1) : 46-51. DOI: 10.13883/j.issn1004-5929.202001005

SurfaceEnhanced Raman Scattering(SERS)

Surface-enhanced Raman Scattering Study of Individual Flower-like Silver Nanoparticles

TAO Chenyang, NING Huan, CHEN Haiyi, FAN Tianyu, ZHAN Yiting, YANG Shuo^*

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Flower-like silver nanoparticles are well-controlled synthesized at room temperature by using silver nitrate as silver precursor, ascorbic acid as reductant and polyvinyl pyrrolidone with different concentrations as surfactant. Their structure and elemental composition are characterized by scanning electronic microscopy, atomic force microscope, X-ray diffraction and energy dispersive X-ray spectroscopy. When the concentration of polyvinyl pyrrolidone is up to 0.1 mol/L, the finest surface structure of the prepared flower-like silver nanoparticles is obtained, and the size of the particles reaches micron scale, which is suitable for the location and optical property study of single particles. The surface-enhanced Raman scattering (SERS) activity of individual and a few structure-optimized flower-like silver nanoparticle substrates are investigated using p-hydroxybenzoic acid as probes. The SERS mechanism of the substrates is analyzed by mean of dark field scattering spectroscopy. The experimental results indicate that the special surface structures of the flower-like silver nanoparticles provide large quantities of “hot spots” for the enhanced Raman intensity. The satisfying SERS properties combined with low synthesis costs show the prospective application possibilities of this novel SERS substrate.

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silver nanoparticles / flower-like structure / individual particle / localized surface plasmon resonance / surface-enhanced Raman scattering

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TAO Chenyang, NING Huan, CHEN Haiyi, FAN Tianyu, ZHAN Yiting, YANG Shuo. Surface-enhanced Raman Scattering Study of Individual Flower-like Silver Nanoparticles. Chinese Journal of Light Scattering. 2020, 32(1): 46-51 https://doi.org/10.13883/j.issn1004-5929.202001005

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Received	Revised	Published
2019-06-28	2019-09-07	2020-03-10
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2022-08-19

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