2007•Europhysics Letters (EPL)Requires access

Formation, photoluminescence and charge storage characteristics of Au nanocrystals embedded in amorphous Al 2 O 3 matrix

Cailei Yuan, Pooi See Lee, S. L. Ye

Abstract

A method to fabricate Au nanocrystals embedded in amorphous Al 2 O 3 matrix has been developed. The formation of spherically shaped Au nanocrystals has been observed using high-resolution transmission electron microscopy (HRTEM). The Au nanocrystals size distribution is narrow and the average diameters are approximately 5 nm. The photoluminescence and charge storage characteristics of Au nanocrystals embedded in amorphous Al 2 O 3 matrix were investigated. A relatively intense visible photoluminescence was exhibited in the small Au nanocrystals. Good performances in terms of large memory window were also observed.

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Key concepts: Photoluminescence, Nanocrystal, High-resolution transmission electron microscopy, Amorphous solid, Materials science, Transmission electron microscopy, Nanotechnology, Matrix (chemical analysis)