You could use Polymer-capped ZnO QDs synthesis method. See the link:

http://www.intechopen.com/download/get/type/pdfs/id/25340

Thanks but i have no a stainless steel autoclave

so i would like another method

thanks

So the best way is hot-injection method (I have tried this method before and got nice results). see the links:

http://arxiv.org/ftp/cond-mat/papers/0407/0407500.pdf

http://pubs.rsc.org/en/content/articlelanding/2013/nr/c3nr02571c#!divAbstract

A very simple way is to use Zn(OAc)2+LiOH or NaOH reaction:

http://www.iitk.ac.in/asid06/proceedings/papers/TP5_02.pdf

For using polyvinyl pyrrolidone:

"Enhanced ultraviolet emission and optical properties in polyvinyl pyrrolidone surface modified ZnO quantum dots"

Link:

http://scitation.aip.org/content/aip/journal/jap/90/9/10.1063/1.1406973

Kindly check the paper