Preparation of Flower-like Silver Micro-Nanoparticles by Lyotropic Liquid Crystal Template Method and Their Surface Enhanced Raman Scattering Properties

YAN Xiatao, YANG Fan, LI Yu, ZHANG Ying

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Chinese Journal of Light Scattering ›› 2021, Vol. 33 ›› Issue (2) : 135-141. DOI: 10.13883/j.issn1004-5929.202102004
Surface-Enhanced Raman Scattering (SERS)

Preparation of Flower-like Silver Micro-Nanoparticles by Lyotropic Liquid Crystal Template Method and Their Surface Enhanced Raman Scattering Properties

  • YAN Xiatao, YANG Fan, LI Yu, ZHANG Ying*
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Abstract

Flower-like silver nanoparticles were prepared on ITO glass substrate by electrodeposition combined with lyotropic liquid crystal soft template assisted silver ion self-assembly synergistic growth effect at room temperature. The controllable preparation of flower-like silver nanoparticles was realized by adjusting the DC voltage of electrodeposition. Scanning electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy were used to characterize the surface morphology, lattice structure and composition of the material. The experimental results show that when the DC voltage is less than 8 V, the number of flake structure and the number of "hot spots" on the surface of silver particles increase with the increase of voltage; when the DC voltage is greater than 8 V, the flake structure tends to be more refined and tends to grow along the substrate surface. Rhodamine 6G was used as a Raman probe to test the Raman enhancement effect of samples prepared under different conditions. The results show that the Raman enhancement effect of samples grown under 8 V voltage is the best, and the enhancement factor can reach 107 order. The sample has good Raman enhancement performance, low cost and simple preparation process, which indicates that the surface enhanced Raman substrate prepared by the modified method has potential application prospects. This study lays the foundation for its further practical application.

Key words

flower-like silver micro-nanostructures / surface enhanced Raman scattering / electrodeposition / lyotropic liquid crystal template

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YAN Xiatao, YANG Fan, LI Yu, ZHANG Ying. Preparation of Flower-like Silver Micro-Nanoparticles by Lyotropic Liquid Crystal Template Method and Their Surface Enhanced Raman Scattering Properties. Chinese Journal of Light Scattering. 2021, 33(2): 135-141 https://doi.org/10.13883/j.issn1004-5929.202102004

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