Issue
EPL
Volume 80, Number 6, December 2007
Article Number 67003
Number of page(s) 4
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/80/67003
Published online 06 November 2007
EPL, 80 (2007) 67003
DOI: 10.1209/0295-5075/80/67003

Formation, photoluminescence and charge storage characteristics of Au nanocrystals embedded in amorphous Al2O3 matrix

C. L. Yuan1, P. S. Lee2 and S. L. Ye3

1  Department of Physics, Jiangxi Normal University - Nanchang 330022, Jiangxi, PRC
2  School of Materials Science and Engineering, Nanyang Technological University - Nanyang Avenue, 639798 Singapore
3  Institute of Microelectronics of Tsinghua University - Beijing 100084, PRC

clyuan@jxnu.edu.cn

received 5 August 2007; accepted in final form 15 October 2007; published December 2007
published online 6 November 2007

Abstract
A method to fabricate Au nanocrystals embedded in amorphous Al2O3 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 Al2O3 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.

PACS
77.55.+f - Dielectric thin films.
78.67.Bf - Nanocrystals and nanoparticles.
78.55.-m - Photoluminescence, properties and materials.

© Europhysics Letters Association 2007