Abstract The microstructure and optical absorption of Au--MgF2 nanoparticle cermet films with different Au contents are studied. The microstructural analysis shows that the films are mainly composed of the amorphous MgF2 matrix with embedded fcc Au nanoparticles with a mean size of 9.8--21.4nm. Spectral analysis suggests that the surface plasma resonance (SPR) absorption peak of Au particles appears at $\lambda$ = 492--537nm. With increasing Au content, absorption peak intensity increases, profile narrows and location redshifts. Theoretical absorption spectra are calculated based on Maxwell-Garnett theory and compared with experimental spectra.
Received: 19 December 2005
Revised: 13 January 2006
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 59972001), the Natural Science Foundation of Anhui Province, China (Grant No 01044901), the Talent Foundation of Anhui Province, China (Grant No 2004Z029), and the Talent Development Foundation of Anhui University,Anhui Province, China.
Cite this article:
Sun Zhao-Qi (孙兆奇), Cai Qi (蔡琪), Song Xue-Ping (宋学萍) Microstructure and optical absorption of Au--MgF2 nanoparticle cermet films 2006 Chinese Physics 15 859
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