Formation, photoluminescence and charge storage characteristics of Au nanocrystals embedded in amorphous Al2O3 matrixC. 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
received 5 August 2007; accepted in final form 15 October 2007; published December 2007
published online 6 November 2007
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.
77.55.+f - Dielectric thin films.
78.67.Bf - Nanocrystals and nanoparticles.
78.55.-m - Photoluminescence, properties and materials.
© Europhysics Letters Association 2007