Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (02): 138-144.doi: 10.3866/PKU.WHXB20000209

• ARTICLE • Previous Articles     Next Articles

Dependence of the Raman Intensity on the Surface Coverage of Nanoparticles in SERS-ctive Gole Nanoparticulate Films

Zhu Zi-Hua, Zhu Tao, Wang Jian, Liu Zhong-Fan   

  1. Center for Nanoscale Science and Technology(CNST),College of Chemistry Molecular Engineering,Peking University,Beijing 100871
  • Received:1999-04-08 Revised:1999-08-17 Published:2000-02-15
  • Contact: Zhu Tao

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Abstract:

The relationship between the surface coverage of nanoparticles and the intensity of surface enhanced Raman scattering(SERS) in a two dimensional gold nanoparticulate film was studied. High enhancement was observed due to the nanoparticle substrate electromagnetic coupling and the contribution of chemical enhancement. It was found that SERS intensity increased linearly at lower coverage, then negatively deflected from the initial line, and finally reached a plateau at increased coverages. It was also found that larger nanoparticles were more effective in Raman enhancement.

Key words: Au nanoparticles, Nanoparticle assembly, SERS, Surface coverage