Determination of Particle Sizes and Crystalline Phases on Colloidal Silicon Nanoparticle Suspensions

Abstract

Abstract: Particle size and crystallinity of silicon nanoparticles were determined by analyzing the optical extinction spectra of colloidal suspensions. Experimental results from these colloids were analyzed using Mie theory in connection with effective medium theory, in order to determine particle sizes and their internal structure with the simple technique of optical transmission spectroscopy. By modeling an effective refractive index for the particles, the crystalline volume fraction can be extracted from extinction spectra in addition to information about the size. The crystalline volume fraction determined in this way were used to calibrate the ratio of the Raman cross sections for nanocrystalline and amorphous silicon, which was found to be σc/σa=0.66.

Key words:

S.M. Scholz, H. Hofmann. Determination of Particle Sizes and Crystalline Phases on Colloidal Silicon Nanoparticle Suspensions[J]. J Mater Sci Technol, 1999, 15(06): 548-550.

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Determination of Particle Sizes and Crystalline Phases on Colloidal Silicon Nanoparticle Suspensions

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