Size-controlled preparation of Cu2O octahedron nanocrystals and studies on their optical absorption

Ping He; Xinghai Shen; Hongcheng Gao

doi:10.1016/j.jcis.2004.10.060

Size-controlled preparation of Cu2O octahedron nanocrystals and studies on their optical absorption

J Colloid Interface Sci. 2005 Apr 15;284(2):510-5. doi: 10.1016/j.jcis.2004.10.060.

Authors

Ping He¹, Xinghai Shen, Hongcheng Gao

Affiliation

¹ Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China.

PMID: 15780289
DOI: 10.1016/j.jcis.2004.10.060

Abstract

We report herein the size-controlled preparation of monodispersed cuprous oxide octahedron nanocrystals smaller than 100 nm. The method is based on the reduction of copper nitrate in Triton X-100 water-in-oil (w/o) microemulsions by gamma-irradiation. The average edge length of the octahedron-shaped nanocrystals varies from 45 to 95 nm as a function of the dose rate. The quantum confinement effect was illustrated by the blueshift in the optical absorption. In addition, the growth process was also traced by absorption spectra.