Dr. Zheng Li and co-workers at Zhejiang University (Hangzhou, China) and at the University of Arkansas report their findings
in a paper recently published in Nano Research.
The full reference:
Uniform Thickness and Colloidal-Stable CdS Quantum Disks with Tunable Thickness: Synthesis and Properties, Zheng Li, Haiyan Qin, Dorel Guzun, Mourad Benamara, Gregory Salamo, and Xiaogang Peng, Nano Res. 2012, 5(5): 337–351
http://www.springerlink.com/content/g5873414n10281tq/?MUD=MP