Does anyone have SOG stored inside SNF?

Hi all,
Does anyone have SOG stored inside SNF? Could you share with me?
I want to spin coat 100-1000nm SiO2 on my nanowire samples to passivate the substrate. The samples are smaller than 1*1cm, so a small amount of SOG is needed.
If anyone can share with me, that will be very helpfull!
Thanks!
Xiaoqing